TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Jović, Borka
AU  - Jović, Vladimir
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6675
AB  - Alkaline fuel cells (AFCs) have recently become attractive as environmental friendly future power sources. It was really important having in mind that in alkaline media less expensive non noble catalysts could be used. Namely, successful alkaline anion exchange membrane development enabled benefits of faster kinetics of oxygen reduction reaction in alkaline solutions. In this study electrodeposited silver-palladium alloys of various composition were investigated and tested as the prospective catalysts for direct ethanol fuel cells application. All samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, as well as by electrochemical techniques: cyclic voltammetry, polarization measurements at rotating disc electrode. The electrochemical active surface area was determined from the charge values corresponding to the reduction of Pd (II) oxide, assuming 420 μC for full oxide monolayer coverage. The optimal alloy composition showing the best catalytic activity for oxygen reduction and ethanol oxidation, with as much as possible lower content of Pd, was determined. It was found that it could be possible to obtain alloys containing only ~ 20% of more noble metal – palladium, showing high activity for both anode and cathode reaction. The stability testing gave very promising results, as well.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019
T1  - Cost effective alloys based catalysts for alkaline fuel cells application
SP  - 104
EP  - 104
UR  - https://hdl.handle.net/21.15107/rcub_dais_6675
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Jović, Borka and Jović, Vladimir and Zabinski, Piotr and Elezović, Nevenka",
year = "2019",
abstract = "Alkaline fuel cells (AFCs) have recently become attractive as environmental friendly future power sources. It was really important having in mind that in alkaline media less expensive non noble catalysts could be used. Namely, successful alkaline anion exchange membrane development enabled benefits of faster kinetics of oxygen reduction reaction in alkaline solutions. In this study electrodeposited silver-palladium alloys of various composition were investigated and tested as the prospective catalysts for direct ethanol fuel cells application. All samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, as well as by electrochemical techniques: cyclic voltammetry, polarization measurements at rotating disc electrode. The electrochemical active surface area was determined from the charge values corresponding to the reduction of Pd (II) oxide, assuming 420 μC for full oxide monolayer coverage. The optimal alloy composition showing the best catalytic activity for oxygen reduction and ethanol oxidation, with as much as possible lower content of Pd, was determined. It was found that it could be possible to obtain alloys containing only ~ 20% of more noble metal – palladium, showing high activity for both anode and cathode reaction. The stability testing gave very promising results, as well.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019",
title = "Cost effective alloys based catalysts for alkaline fuel cells application",
pages = "104-104",
url = "https://hdl.handle.net/21.15107/rcub_dais_6675"
}

Gajić Krstajić, L., Jović, B., Jović, V., Zabinski, P.,& Elezović, N.. (2019). Cost effective alloys based catalysts for alkaline fuel cells application. in Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019
Belgrade : Materials Research Society of Serbia., 104-104.
https://hdl.handle.net/21.15107/rcub_dais_6675

Gajić Krstajić L, Jović B, Jović V, Zabinski P, Elezović N. Cost effective alloys based catalysts for alkaline fuel cells application. in Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019. 2019;:104-104.
https://hdl.handle.net/21.15107/rcub_dais_6675 .

Gajić Krstajić, Ljiljana, Jović, Borka, Jović, Vladimir, Zabinski, Piotr, Elezović, Nevenka, "Cost effective alloys based catalysts for alkaline fuel cells application" in Programme and The Book of abstracts / Twenty-first Annual Conference YUCOMAT 2019 & Eleventh World Round Table Conference on Sintering WRTCS 2019, Herceg Novi, Montenegro, September 2-6, 2019 (2019):104-104,
https://hdl.handle.net/21.15107/rcub_dais_6675 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Radmilović, Velimir R.
AU  - Ercius, Peter
AU  - Jović, Borka
AU  - Jović, Vladimir
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3633
AB  - Platinum based nanostructures on carbon support are state of the art materials for proton exchange membrane fuel cells application. Contemporary research directions in this field imply synthesis and characterization of novel carbon free catalysts supports to overcome disadvantages of carbon supported ones. We have recently synthesized platinum and palladium nanocatalysts onto different novel metal oxide based supports: titanium-oxide, tin oxide and tungsten oxide, doped by different metals (Nb, Ru, Sb), to achieve satisfactory conductivity. These novel nanostructures were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), as well as by electrochemical techniques. The synthesized nanostructured catalysts were tested for oxygen reduction reaction. Obtained catalytic activities and stabilities were compared to the same noble metal loading catalysts on Vulcan XC-72 support. The results of comparison revealed many advantages of carbon free supported nanocatalysts, regarding both activity and stability.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
T1  - Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application
SP  - 112
EP  - 112
UR  - https://hdl.handle.net/21.15107/rcub_dais_3633
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Radmilović, Velimir R. and Ercius, Peter and Jović, Borka and Jović, Vladimir and Zabinski, Piotr and Elezović, Nevenka",
year = "2018",
abstract = "Platinum based nanostructures on carbon support are state of the art materials for proton exchange membrane fuel cells application. Contemporary research directions in this field imply synthesis and characterization of novel carbon free catalysts supports to overcome disadvantages of carbon supported ones. We have recently synthesized platinum and palladium nanocatalysts onto different novel metal oxide based supports: titanium-oxide, tin oxide and tungsten oxide, doped by different metals (Nb, Ru, Sb), to achieve satisfactory conductivity. These novel nanostructures were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), as well as by electrochemical techniques. The synthesized nanostructured catalysts were tested for oxygen reduction reaction. Obtained catalytic activities and stabilities were compared to the same noble metal loading catalysts on Vulcan XC-72 support. The results of comparison revealed many advantages of carbon free supported nanocatalysts, regarding both activity and stability.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018",
title = "Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application",
pages = "112-112",
url = "https://hdl.handle.net/21.15107/rcub_dais_3633"
}

Gajić Krstajić, L., Radmilović, V. R., Ercius, P., Jović, B., Jović, V., Zabinski, P.,& Elezović, N.. (2018). Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
Belgrade : Materials Research Society of Serbia., 112-112.
https://hdl.handle.net/21.15107/rcub_dais_3633

Gajić Krstajić L, Radmilović VR, Ercius P, Jović B, Jović V, Zabinski P, Elezović N. Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018. 2018;:112-112.
https://hdl.handle.net/21.15107/rcub_dais_3633 .

Gajić Krstajić, Ljiljana, Radmilović, Velimir R., Ercius, Peter, Jović, Borka, Jović, Vladimir, Zabinski, Piotr, Elezović, Nevenka, "Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application" in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018 (2018):112-112,
https://hdl.handle.net/21.15107/rcub_dais_3633 .

TY  - JOUR
AU  - Lović, J. D.
AU  - Elezović, Nevenka
AU  - Jović, Borka
AU  - Zabinski, Piotr
AU  - Gajić-Krstajić, Ljiljana
AU  - Jović, Vladimir
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4076
AB  - The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (−0.178 mA cm−2 and -0.415 mA cm−2 respectively) to the charge of −0.2 C cm−2 (thickness ∼ 0.18 μm) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of −3.0 C cm−2 (thickness ∼ 2.8 μm) at a constant current density of −7.0 mA cm−2 under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag – 27.4 at.% Pd and 84.7 at.% Ag – 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag – hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR. © 2018 Hydrogen Energy Publications LLC
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction
SP  - 18498
EP  - 18508
VL  - 43
IS  - 39
DO  - 10.1016/j.ijhydene.2018.08.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_4076
ER  - 

@article{
author = "Lović, J. D. and Elezović, Nevenka and Jović, Borka and Zabinski, Piotr and Gajić-Krstajić, Ljiljana and Jović, Vladimir",
year = "2018",
abstract = "The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (−0.178 mA cm−2 and -0.415 mA cm−2 respectively) to the charge of −0.2 C cm−2 (thickness ∼ 0.18 μm) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of −3.0 C cm−2 (thickness ∼ 2.8 μm) at a constant current density of −7.0 mA cm−2 under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag – 27.4 at.% Pd and 84.7 at.% Ag – 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag – hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR. © 2018 Hydrogen Energy Publications LLC",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction",
pages = "18498-18508",
volume = "43",
number = "39",
doi = "10.1016/j.ijhydene.2018.08.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_4076"
}

Lović, J. D., Elezović, N., Jović, B., Zabinski, P., Gajić-Krstajić, L.,& Jović, V.. (2018). Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy
Elsevier., 43(39), 18498-18508.
https://doi.org/10.1016/j.ijhydene.2018.08.056
https://hdl.handle.net/21.15107/rcub_dais_4076

Lović JD, Elezović N, Jović B, Zabinski P, Gajić-Krstajić L, Jović V. Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy. 2018;43(39):18498-18508.
doi:10.1016/j.ijhydene.2018.08.056
https://hdl.handle.net/21.15107/rcub_dais_4076 .

Lović, J. D., Elezović, Nevenka, Jović, Borka, Zabinski, Piotr, Gajić-Krstajić, Ljiljana, Jović, Vladimir, "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction" in International Journal of Hydrogen Energy, 43, no. 39 (2018):18498-18508,
https://doi.org/10.1016/j.ijhydene.2018.08.056 .,
https://hdl.handle.net/21.15107/rcub_dais_4076 .

TY  - DATA
AU  - Lović, J. D.
AU  - Elezović, Nevenka
AU  - Jović, Borka
AU  - Zabinski, Piotr
AU  - Gajić-Krstajić, Ljiljana
AU  - Jović, Vladimir
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4082
T2  - International Journal of Hydrogen Energy
T2  - International Journal of Hydrogen Energy
T1  - Supporting information for the article:    Lović, J.D., N.R. Elezović, B.M. Jović, P. Zabinski, L. Gajić-Krstajić, and V.D. Jović. 2018. “Electrodeposited AgPd Alloy Coatings as Efficient Catalysts for the Ethanol Oxidation Reaction.” International Journal of Hydrogen Energy 43 (39): 18498–508. https://doi.org/10.1016/j.ijhydene.2018.08.056
VL  - 43
IS  - 39
UR  - https://hdl.handle.net/21.15107/rcub_dais_4082
ER  - 

@misc{
author = "Lović, J. D. and Elezović, Nevenka and Jović, Borka and Zabinski, Piotr and Gajić-Krstajić, Ljiljana and Jović, Vladimir",
year = "2018",
journal = "International Journal of Hydrogen Energy, International Journal of Hydrogen Energy",
title = "Supporting information for the article:    Lović, J.D., N.R. Elezović, B.M. Jović, P. Zabinski, L. Gajić-Krstajić, and V.D. Jović. 2018. “Electrodeposited AgPd Alloy Coatings as Efficient Catalysts for the Ethanol Oxidation Reaction.” International Journal of Hydrogen Energy 43 (39): 18498–508. https://doi.org/10.1016/j.ijhydene.2018.08.056",
volume = "43",
number = "39",
url = "https://hdl.handle.net/21.15107/rcub_dais_4082"
}

Lović, J. D., Elezović, N., Jović, B., Zabinski, P., Gajić-Krstajić, L.,& Jović, V.. (2018). Supporting information for the article:    Lović, J.D., N.R. Elezović, B.M. Jović, P. Zabinski, L. Gajić-Krstajić, and V.D. Jović. 2018. “Electrodeposited AgPd Alloy Coatings as Efficient Catalysts for the Ethanol Oxidation Reaction.” International Journal of Hydrogen Energy 43 (39): 18498–508. https://doi.org/10.1016/j.ijhydene.2018.08.056. in International Journal of Hydrogen Energy, 43(39).
https://hdl.handle.net/21.15107/rcub_dais_4082

Lović JD, Elezović N, Jović B, Zabinski P, Gajić-Krstajić L, Jović V. Supporting information for the article:    Lović, J.D., N.R. Elezović, B.M. Jović, P. Zabinski, L. Gajić-Krstajić, and V.D. Jović. 2018. “Electrodeposited AgPd Alloy Coatings as Efficient Catalysts for the Ethanol Oxidation Reaction.” International Journal of Hydrogen Energy 43 (39): 18498–508. https://doi.org/10.1016/j.ijhydene.2018.08.056. in International Journal of Hydrogen Energy. 2018;43(39).
https://hdl.handle.net/21.15107/rcub_dais_4082 .

Lović, J. D., Elezović, Nevenka, Jović, Borka, Zabinski, Piotr, Gajić-Krstajić, Ljiljana, Jović, Vladimir, "Supporting information for the article:    Lović, J.D., N.R. Elezović, B.M. Jović, P. Zabinski, L. Gajić-Krstajić, and V.D. Jović. 2018. “Electrodeposited AgPd Alloy Coatings as Efficient Catalysts for the Ethanol Oxidation Reaction.” International Journal of Hydrogen Energy 43 (39): 18498–508. https://doi.org/10.1016/j.ijhydene.2018.08.056" in International Journal of Hydrogen Energy, 43, no. 39 (2018),
https://hdl.handle.net/21.15107/rcub_dais_4082 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Jović, Vladimir
AU  - Jović, Borka
AU  - Lačnjevac, Uroš
AU  - Krstajić, Nedeljko
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15445
AB  - Electrodeposited NiSn alloy coatings were tested for application as cathodes and anodes in the cell for alkaline water electrolysis in 30 wt.% KOH at 80 ºC. The "accelerated service life test" (ASLT) was performed for HER and OER reactions, and compared to those for Ni electrode. The morphology and chemical compositions of the NiSn and Ni coatings were investigated by SEM and EDS, while their surface composition was investigated by XPS before and after the ASLT for both reactions, respectively. It was shown that the cell voltage at j = 0.3 A cm-2 saving with the NiSn electrodes amounts to about 435 mV before and about 304 mV after the ASLT. SEM results showed that no changes in the morphology of as prepared samples could be detected after the ASLTs for both reactions. EDS and XPS analysis confirmed that some changes occurred during the ASLT, particularly for the oxygen content in the surface layer. This work was financially supported by Ministry of Education, Science and Technological Development Republic of Serbia, under Contract No. 172054.
he authors would like to acknowledge networking support by the COST Action MP1407.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Accelerated service life test of electrodeposited NiSn coatings as bifunctional hydrogen and oxygen evolution catalysts for alkaline water electrolysis
SP  - 92
EP  - 92
UR  - https://hdl.handle.net/21.15107/rcub_dais_15445
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Jović, Vladimir and Jović, Borka and Lačnjevac, Uroš and Krstajić, Nedeljko and Zabinski, Piotr and Elezović, Nevenka",
year = "2017",
abstract = "Electrodeposited NiSn alloy coatings were tested for application as cathodes and anodes in the cell for alkaline water electrolysis in 30 wt.% KOH at 80 ºC. The "accelerated service life test" (ASLT) was performed for HER and OER reactions, and compared to those for Ni electrode. The morphology and chemical compositions of the NiSn and Ni coatings were investigated by SEM and EDS, while their surface composition was investigated by XPS before and after the ASLT for both reactions, respectively. It was shown that the cell voltage at j = 0.3 A cm-2 saving with the NiSn electrodes amounts to about 435 mV before and about 304 mV after the ASLT. SEM results showed that no changes in the morphology of as prepared samples could be detected after the ASLTs for both reactions. EDS and XPS analysis confirmed that some changes occurred during the ASLT, particularly for the oxygen content in the surface layer. This work was financially supported by Ministry of Education, Science and Technological Development Republic of Serbia, under Contract No. 172054.
he authors would like to acknowledge networking support by the COST Action MP1407.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Accelerated service life test of electrodeposited NiSn coatings as bifunctional hydrogen and oxygen evolution catalysts for alkaline water electrolysis",
pages = "92-92",
url = "https://hdl.handle.net/21.15107/rcub_dais_15445"
}

Gajić Krstajić, L., Jović, V., Jović, B., Lačnjevac, U., Krstajić, N., Zabinski, P.,& Elezović, N.. (2017). Accelerated service life test of electrodeposited NiSn coatings as bifunctional hydrogen and oxygen evolution catalysts for alkaline water electrolysis. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 92-92.
https://hdl.handle.net/21.15107/rcub_dais_15445

Gajić Krstajić L, Jović V, Jović B, Lačnjevac U, Krstajić N, Zabinski P, Elezović N. Accelerated service life test of electrodeposited NiSn coatings as bifunctional hydrogen and oxygen evolution catalysts for alkaline water electrolysis. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:92-92.
https://hdl.handle.net/21.15107/rcub_dais_15445 .

Gajić Krstajić, Ljiljana, Jović, Vladimir, Jović, Borka, Lačnjevac, Uroš, Krstajić, Nedeljko, Zabinski, Piotr, Elezović, Nevenka, "Accelerated service life test of electrodeposited NiSn coatings as bifunctional hydrogen and oxygen evolution catalysts for alkaline water electrolysis" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):92-92,
https://hdl.handle.net/21.15107/rcub_dais_15445 .

TY  - JOUR
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Jović, Borka
AU  - Martelli, Gian N.
AU  - Jović, Vladimir
AU  - Krstajić, Nedeljko
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15969
AB  - The aim of this study was to gain a better understanding of the feasibility of partial replacement of dichromate, Cr(VI), with phosphate buffer, focusing on the cathode reaction selectivity for hydrogen evolution on mild steel and Fe-Mo cathodes in undivided cell for chlorate production. To evaluate the ability of phosphate and Cr(VI) additions to hinder hypochlorite and chlorate reduction, overall current efficiency (CE) measurements in laboratory cell for chlorate production on stationary electrodes were performed. The concentration of hypochlorite was determined by a conventional potentiometric titration method using 0.01 mol dm-3 As2O3 solution as a titrant. The chlorate concentration was determined by excess of 1.0 mol dm-3 As2O3 solution and excess of arsenic oxide was titrated with 0.1 mol dm-3 KBrO3 solution in a strong acidic solution. Cathodic hypochlorite and chlorate reduction were suppressed efficiently by addition of 3 g dm-3 dichromate at both cathodes, except that Fe-Mo cathode exhibited higher catalytic activity for hydrogen evolution reaction (HER). The overvoltage for the HER was around 0.17 V lower on Fe-Mo cathode than on mild steel at the current density of 3 kA m-2. It was found that a dichromate content as low as 0.1 g dm-3 is sufficient for complete suppression of cathodic hypochlorite and chlorate reduction onto Fe-Mo catalyst in phosphate buffering system (3 g dm-3 Na2HPO4 + NaH2PO4). The overall current efficiency was practically the same as in the case of the presence of 3 g dm-3 dichromate buffer (98 %). However, for the mild steel cathode, the overall current efficiency for the chlorate production was somewhat lower in the above mentioned mixed phosphate + dichromate buffering system (95%) than in the pure dichromate buffering solution (97.5%).
PB  - Belgrade Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Fe–Mo alloy coatings as cathodes in chlorate production process
SP  - 81
EP  - 89
VL  - 70
IS  - 1
DO  - 10.2298/HEMIND150119014G
UR  - https://hdl.handle.net/21.15107/rcub_dais_15969
ER  - 

@article{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Jović, Borka and Martelli, Gian N. and Jović, Vladimir and Krstajić, Nedeljko",
year = "2016",
abstract = "The aim of this study was to gain a better understanding of the feasibility of partial replacement of dichromate, Cr(VI), with phosphate buffer, focusing on the cathode reaction selectivity for hydrogen evolution on mild steel and Fe-Mo cathodes in undivided cell for chlorate production. To evaluate the ability of phosphate and Cr(VI) additions to hinder hypochlorite and chlorate reduction, overall current efficiency (CE) measurements in laboratory cell for chlorate production on stationary electrodes were performed. The concentration of hypochlorite was determined by a conventional potentiometric titration method using 0.01 mol dm-3 As2O3 solution as a titrant. The chlorate concentration was determined by excess of 1.0 mol dm-3 As2O3 solution and excess of arsenic oxide was titrated with 0.1 mol dm-3 KBrO3 solution in a strong acidic solution. Cathodic hypochlorite and chlorate reduction were suppressed efficiently by addition of 3 g dm-3 dichromate at both cathodes, except that Fe-Mo cathode exhibited higher catalytic activity for hydrogen evolution reaction (HER). The overvoltage for the HER was around 0.17 V lower on Fe-Mo cathode than on mild steel at the current density of 3 kA m-2. It was found that a dichromate content as low as 0.1 g dm-3 is sufficient for complete suppression of cathodic hypochlorite and chlorate reduction onto Fe-Mo catalyst in phosphate buffering system (3 g dm-3 Na2HPO4 + NaH2PO4). The overall current efficiency was practically the same as in the case of the presence of 3 g dm-3 dichromate buffer (98 %). However, for the mild steel cathode, the overall current efficiency for the chlorate production was somewhat lower in the above mentioned mixed phosphate + dichromate buffering system (95%) than in the pure dichromate buffering solution (97.5%).",
publisher = "Belgrade Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Fe–Mo alloy coatings as cathodes in chlorate production process",
pages = "81-89",
volume = "70",
number = "1",
doi = "10.2298/HEMIND150119014G",
url = "https://hdl.handle.net/21.15107/rcub_dais_15969"
}

Gajić Krstajić, L., Elezović, N., Jović, B., Martelli, G. N., Jović, V.,& Krstajić, N.. (2016). Fe–Mo alloy coatings as cathodes in chlorate production process. in Hemijska industrija
Belgrade Association of the Chemical Engineers of Serbia., 70(1), 81-89.
https://doi.org/10.2298/HEMIND150119014G
https://hdl.handle.net/21.15107/rcub_dais_15969

Gajić Krstajić L, Elezović N, Jović B, Martelli GN, Jović V, Krstajić N. Fe–Mo alloy coatings as cathodes in chlorate production process. in Hemijska industrija. 2016;70(1):81-89.
doi:10.2298/HEMIND150119014G
https://hdl.handle.net/21.15107/rcub_dais_15969 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Jović, Borka, Martelli, Gian N., Jović, Vladimir, Krstajić, Nedeljko, "Fe–Mo alloy coatings as cathodes in chlorate production process" in Hemijska industrija, 70, no. 1 (2016):81-89,
https://doi.org/10.2298/HEMIND150119014G .,
https://hdl.handle.net/21.15107/rcub_dais_15969 .

TY  - JOUR
AU  - Jović, Borka
AU  - Lačnjevac, Uroš
AU  - Jović, Vladimir
AU  - Gajić Krstajić, Ljiljana
AU  - Kovač, Janez
AU  - Poleti, Dejan
AU  - Krstajić, Nedeljko
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15978
AB  - The oxygen evolution reaction (OER) was studied at pure Ni and Ni-(Ebonex/Ir) composite coatings in 1 M NaOH solution at 25 °C. Ni-(Ebonex-supported Ir) coatings were electrodeposited from a nickel Watts bath containing different concentrations of suspended Ebonex/Ir particles (0–2 g dm−3) onto a Ni 40 mesh substrate. The surface morphology of the coatings was examined by scanning electron microscopy (SEM), the surface composition by energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRPD) and X-ray photoelectron spectroscopy (XPS), whereas the electrochemical properties were studied by electrochemical impedance spectroscopy (EIS), polarization measurements and cyclic voltammetry (CV). It was shown that the roughness factor of Ni-(Ebonex/Ir) composite coatings calculated relative to the surface area of the pure Ni sample increased with the increasing content of Ebonex/Ir particles in the bath to a maximum value of 40.6. All samples displayed a Tafel slope of about 60 mV dec−1 in the potential range corresponding to lower current densities for the OER. The increase of the apparent activity for the OER at Ni-(Ebonex/Ir) coatings compared with the pure Ni coating was attributed only to the increase of the electrochemically active surface area. Although the pure Ni coating initially exhibited higher intrinsic catalytic activity for the OER than the composite coatings, it also showed a drastic loss of activity after subjecting to continuous oxygen evolution at j = 50 mA cm−2 for 24 h (ΔE = 395 mV). At the same time, the OER overpotential at Ni-(Ebonex/Ir) coatings only negligibly increased after the stability test (ΔE = 22 mV). The improved retention of catalytic activity observed with Ni-(Ebonex/Ir) coatings was ascribed to the presence of IrO2, which inhibited the formation of the inactive γ-NiOOH phase.
T2  - International Journal of Hydrogen Energy
T1  - Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution
SP  - 20502
EP  - 20514
VL  - 41
IS  - 45
DO  - 10.1016/j.ijhydene.2016.08.226
UR  - https://hdl.handle.net/21.15107/rcub_dais_15978
ER  - 

@article{
author = "Jović, Borka and Lačnjevac, Uroš and Jović, Vladimir and Gajić Krstajić, Ljiljana and Kovač, Janez and Poleti, Dejan and Krstajić, Nedeljko",
year = "2016",
abstract = "The oxygen evolution reaction (OER) was studied at pure Ni and Ni-(Ebonex/Ir) composite coatings in 1 M NaOH solution at 25 °C. Ni-(Ebonex-supported Ir) coatings were electrodeposited from a nickel Watts bath containing different concentrations of suspended Ebonex/Ir particles (0–2 g dm−3) onto a Ni 40 mesh substrate. The surface morphology of the coatings was examined by scanning electron microscopy (SEM), the surface composition by energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRPD) and X-ray photoelectron spectroscopy (XPS), whereas the electrochemical properties were studied by electrochemical impedance spectroscopy (EIS), polarization measurements and cyclic voltammetry (CV). It was shown that the roughness factor of Ni-(Ebonex/Ir) composite coatings calculated relative to the surface area of the pure Ni sample increased with the increasing content of Ebonex/Ir particles in the bath to a maximum value of 40.6. All samples displayed a Tafel slope of about 60 mV dec−1 in the potential range corresponding to lower current densities for the OER. The increase of the apparent activity for the OER at Ni-(Ebonex/Ir) coatings compared with the pure Ni coating was attributed only to the increase of the electrochemically active surface area. Although the pure Ni coating initially exhibited higher intrinsic catalytic activity for the OER than the composite coatings, it also showed a drastic loss of activity after subjecting to continuous oxygen evolution at j = 50 mA cm−2 for 24 h (ΔE = 395 mV). At the same time, the OER overpotential at Ni-(Ebonex/Ir) coatings only negligibly increased after the stability test (ΔE = 22 mV). The improved retention of catalytic activity observed with Ni-(Ebonex/Ir) coatings was ascribed to the presence of IrO2, which inhibited the formation of the inactive γ-NiOOH phase.",
journal = "International Journal of Hydrogen Energy",
title = "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution",
pages = "20502-20514",
volume = "41",
number = "45",
doi = "10.1016/j.ijhydene.2016.08.226",
url = "https://hdl.handle.net/21.15107/rcub_dais_15978"
}

Jović, B., Lačnjevac, U., Jović, V., Gajić Krstajić, L., Kovač, J., Poleti, D.,& Krstajić, N.. (2016). Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution. in International Journal of Hydrogen Energy, 41(45), 20502-20514.
https://doi.org/10.1016/j.ijhydene.2016.08.226
https://hdl.handle.net/21.15107/rcub_dais_15978

Jović B, Lačnjevac U, Jović V, Gajić Krstajić L, Kovač J, Poleti D, Krstajić N. Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution. in International Journal of Hydrogen Energy. 2016;41(45):20502-20514.
doi:10.1016/j.ijhydene.2016.08.226
https://hdl.handle.net/21.15107/rcub_dais_15978 .

Jović, Borka, Lačnjevac, Uroš, Jović, Vladimir, Gajić Krstajić, Ljiljana, Kovač, Janez, Poleti, Dejan, Krstajić, Nedeljko, "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution" in International Journal of Hydrogen Energy, 41, no. 45 (2016):20502-20514,
https://doi.org/10.1016/j.ijhydene.2016.08.226 .,
https://hdl.handle.net/21.15107/rcub_dais_15978 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Zabinski, Piotr
AU  - Radmilović, Velimir R.
AU  - Ercius, Peter
AU  - Krstajić Pajić, Mila
AU  - Lačnjevac, Uroš
AU  - Krstajić, Nedeljko
AU  - Elezović, Nevenka
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/895
AB  - Tungsten carbide was prepared by polycondensation of resorcinol and formaldehyde in the presence cetyltrimethylammonium bromide (CTABr) surfactant. Pd nanocatalyst at this support was synthesized by borohydride reduction method. The obtained materials were characterized by XRD, HRTEM, EELS, XPS and electrochemical measurements. TEM analysis revealed Pd nanoparticles size in the range of a few nanometers, even the clusters of Pd atoms. X-Ray Photoelectron Spectroscopy was applied to determine surface composition of the substrates. The presence of palladium based species was revealed. The catalytic activity for the hydrogen oxidation reaction and oxygen reduction were investigated in 0.5 M HClO4 by cyclic voltammetry and linear sweep voltammetry at the rotating disc electrode. The catalysts’ activities were compared to the carbon supported Pd nanoparticles (Vulcan XC 72). WC supported Pd nanoparticles have shown higher CO tolerance, compared even to Pt based catalyst. 

Acknowledgements: This work was financially supported by Ministry of Education, Science and Technological Development, Republic of Serbia, contract No. 172054.
The authors would like to acknowledge networking support by the COST Action MP1407.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
T1  - Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application
SP  - 71
EP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_dais_895
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Zabinski, Piotr and Radmilović, Velimir R. and Ercius, Peter and Krstajić Pajić, Mila and Lačnjevac, Uroš and Krstajić, Nedeljko and Elezović, Nevenka",
year = "2016",
abstract = "Tungsten carbide was prepared by polycondensation of resorcinol and formaldehyde in the presence cetyltrimethylammonium bromide (CTABr) surfactant. Pd nanocatalyst at this support was synthesized by borohydride reduction method. The obtained materials were characterized by XRD, HRTEM, EELS, XPS and electrochemical measurements. TEM analysis revealed Pd nanoparticles size in the range of a few nanometers, even the clusters of Pd atoms. X-Ray Photoelectron Spectroscopy was applied to determine surface composition of the substrates. The presence of palladium based species was revealed. The catalytic activity for the hydrogen oxidation reaction and oxygen reduction were investigated in 0.5 M HClO4 by cyclic voltammetry and linear sweep voltammetry at the rotating disc electrode. The catalysts’ activities were compared to the carbon supported Pd nanoparticles (Vulcan XC 72). WC supported Pd nanoparticles have shown higher CO tolerance, compared even to Pt based catalyst. 

Acknowledgements: This work was financially supported by Ministry of Education, Science and Technological Development, Republic of Serbia, contract No. 172054.
The authors would like to acknowledge networking support by the COST Action MP1407.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016",
title = "Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application",
pages = "71-71",
url = "https://hdl.handle.net/21.15107/rcub_dais_895"
}

Gajić Krstajić, L., Zabinski, P., Radmilović, V. R., Ercius, P., Krstajić Pajić, M., Lačnjevac, U., Krstajić, N.,& Elezović, N.. (2016). Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
Belgrade : Materials Research Society of Serbia., 71-71.
https://hdl.handle.net/21.15107/rcub_dais_895

Gajić Krstajić L, Zabinski P, Radmilović VR, Ercius P, Krstajić Pajić M, Lačnjevac U, Krstajić N, Elezović N. Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016. 2016;:71-71.
https://hdl.handle.net/21.15107/rcub_dais_895 .

Gajić Krstajić, Ljiljana, Zabinski, Piotr, Radmilović, Velimir R., Ercius, Peter, Krstajić Pajić, Mila, Lačnjevac, Uroš, Krstajić, Nedeljko, Elezović, Nevenka, "Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application" in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016 (2016):71-71,
https://hdl.handle.net/21.15107/rcub_dais_895 .

TY  - JOUR
AU  - Jović, Borka
AU  - Jović, Vladimir
AU  - Lačnjevac, Uroš
AU  - Gajić Krstajić, Ljiljana
AU  - Krstajić, Nedeljko
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/3530
AB  - The hydrogen evolution reaction (HER) was studied at electrodeposited Ni and Ni-(Ebonex/Ir) composite coatings in 1 mol dm-3 NaOH solution at 25 °C. The Ni-(Ebonex/Ir) coatings were electrodeposited from a nickel Watts type bath containing different amounts of suspended Ebonex/Ir(30 wt.%) powder particles (0-2 g dm-3) onto a Ni 40 mesh substrate. The electrodes were investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electrochemical impedance spectroscopy (EIS) and polarization measurements. It was shown that the roughness factor of coatings increased to a maximum value of 27 with increasing the concentration of Ebonex/Ir particles in the deposition bath, while that of a pure Ni coating was found to be 3.2. In the whole potential range of the HER only one Tafel slope of about -120 mV dec-1 was observed at all polarization curves. Considerably improved intrinsic catalytic activity for the HER compared to pure Ni was achieved with the composite coating deposited from the bath with the lowest concentration of Ebonex/Ir particles (0.1 g dm-3). Further enhancement of the apparent catalytic activity for the HER of Ni-(Ebonex/Ir) composite coatings obtained at higher concentrations of suspended Ebonex/Ir particles in the bath was attributed only to the increase of their electrochemically active surface area. © 2015 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part I: Hydrogen evolution
SP  - 10480
EP  - 10490
VL  - 40
IS  - 33
DO  - 10.1016/j.ijhydene.2015.06.127
UR  - https://hdl.handle.net/21.15107/rcub_dais_3530
ER  - 

@article{
author = "Jović, Borka and Jović, Vladimir and Lačnjevac, Uroš and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko",
year = "2015",
abstract = "The hydrogen evolution reaction (HER) was studied at electrodeposited Ni and Ni-(Ebonex/Ir) composite coatings in 1 mol dm-3 NaOH solution at 25 °C. The Ni-(Ebonex/Ir) coatings were electrodeposited from a nickel Watts type bath containing different amounts of suspended Ebonex/Ir(30 wt.%) powder particles (0-2 g dm-3) onto a Ni 40 mesh substrate. The electrodes were investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electrochemical impedance spectroscopy (EIS) and polarization measurements. It was shown that the roughness factor of coatings increased to a maximum value of 27 with increasing the concentration of Ebonex/Ir particles in the deposition bath, while that of a pure Ni coating was found to be 3.2. In the whole potential range of the HER only one Tafel slope of about -120 mV dec-1 was observed at all polarization curves. Considerably improved intrinsic catalytic activity for the HER compared to pure Ni was achieved with the composite coating deposited from the bath with the lowest concentration of Ebonex/Ir particles (0.1 g dm-3). Further enhancement of the apparent catalytic activity for the HER of Ni-(Ebonex/Ir) composite coatings obtained at higher concentrations of suspended Ebonex/Ir particles in the bath was attributed only to the increase of their electrochemically active surface area. © 2015 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part I: Hydrogen evolution",
pages = "10480-10490",
volume = "40",
number = "33",
doi = "10.1016/j.ijhydene.2015.06.127",
url = "https://hdl.handle.net/21.15107/rcub_dais_3530"
}

Jović, B., Jović, V., Lačnjevac, U., Gajić Krstajić, L.,& Krstajić, N.. (2015). Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part I: Hydrogen evolution. in International Journal of Hydrogen Energy
Elsevier., 40(33), 10480-10490.
https://doi.org/10.1016/j.ijhydene.2015.06.127
https://hdl.handle.net/21.15107/rcub_dais_3530

Jović B, Jović V, Lačnjevac U, Gajić Krstajić L, Krstajić N. Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part I: Hydrogen evolution. in International Journal of Hydrogen Energy. 2015;40(33):10480-10490.
doi:10.1016/j.ijhydene.2015.06.127
https://hdl.handle.net/21.15107/rcub_dais_3530 .

Jović, Borka, Jović, Vladimir, Lačnjevac, Uroš, Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part I: Hydrogen evolution" in International Journal of Hydrogen Energy, 40, no. 33 (2015):10480-10490,
https://doi.org/10.1016/j.ijhydene.2015.06.127 .,
https://hdl.handle.net/21.15107/rcub_dais_3530 .

TY  - JOUR
AU  - Elezović, Nevenka
AU  - Radmilović, Velimir R.
AU  - Kovač, Janez
AU  - Babić, Biljana M.
AU  - Gajić Krstajić, Ljiljana
AU  - Krstajić, Nedeljko
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/3354
AB  - A platinum nanocatalyst on Sb doped tin oxide support (Sb-SnO2) was synthesized and characterized as a catalyst for oxygen reduction reaction in 0.1 mol dm(-3) NaOH solution at 25 degrees C. Sb (5%) doped tin oxide support was synthesized by a modified hydrazine reduction procedure. The platinum nanocatalyst (20% Pt) on Sb-SnO2 support was synthesized by a borohydride reduction method. The synthesized support and catalyst were characterized by high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) and X-ray diffraction technique (XRD). X-ray photoelectron spectroscopy was applied to characterize the chemical status of elements before and after Pt-treatment. XPS spectra of Sn 3d, Pt 4f, Sb 3d and O 1s revealed that the Pt-deposition on Sb-SnO2 support induced the reduction of the Sn(4+) oxidation state to Sn(2+) and Sn(0) states, while Pt remained in the metallic state and Sb was in the (3+) oxidation state. Homogenous Pt nanoparticle distribution over the support, without pronounced particle agglomeration, was confirmed by HRTEM technique. The average Pt particle size was 2.9 nm. The electrochemically active Pt surface area of the catalyst was determined by the integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 mu C cm(-2) for full monolayer coverage. This calculation gave the value of 51 m(2) g(-1). The kinetics of the oxygen reduction reaction with Pt/[Sb-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry using a rotating gold disc electrode. Two different Tafel slopes were observed: one close to 60 mV dec(-1) in the low current density region, and another at similar to 120 mV dec(-1) in the higher current densities region, as was already referred in previous reports for the oxygen reduction reaction with polycrystalline Pt, as well as with different Pt based nanocatalysts. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs. RHE), were compared to a carbon supported (Vulcan XC-72) catalyst. The Pt/[Sb-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The advantages of the carbon free support application in terms of the durability and stability of the catalysts were proved by accelerated stability tests.
T2  - RSC Advances
T1  - Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions
SP  - 15923
EP  - 15929
VL  - 5
IS  - 21
DO  - 10.1039/c4ra13391a
UR  - https://hdl.handle.net/21.15107/rcub_dais_3354
ER  - 

@article{
author = "Elezović, Nevenka and Radmilović, Velimir R. and Kovač, Janez and Babić, Biljana M. and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko",
year = "2015",
abstract = "A platinum nanocatalyst on Sb doped tin oxide support (Sb-SnO2) was synthesized and characterized as a catalyst for oxygen reduction reaction in 0.1 mol dm(-3) NaOH solution at 25 degrees C. Sb (5%) doped tin oxide support was synthesized by a modified hydrazine reduction procedure. The platinum nanocatalyst (20% Pt) on Sb-SnO2 support was synthesized by a borohydride reduction method. The synthesized support and catalyst were characterized by high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) and X-ray diffraction technique (XRD). X-ray photoelectron spectroscopy was applied to characterize the chemical status of elements before and after Pt-treatment. XPS spectra of Sn 3d, Pt 4f, Sb 3d and O 1s revealed that the Pt-deposition on Sb-SnO2 support induced the reduction of the Sn(4+) oxidation state to Sn(2+) and Sn(0) states, while Pt remained in the metallic state and Sb was in the (3+) oxidation state. Homogenous Pt nanoparticle distribution over the support, without pronounced particle agglomeration, was confirmed by HRTEM technique. The average Pt particle size was 2.9 nm. The electrochemically active Pt surface area of the catalyst was determined by the integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 mu C cm(-2) for full monolayer coverage. This calculation gave the value of 51 m(2) g(-1). The kinetics of the oxygen reduction reaction with Pt/[Sb-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry using a rotating gold disc electrode. Two different Tafel slopes were observed: one close to 60 mV dec(-1) in the low current density region, and another at similar to 120 mV dec(-1) in the higher current densities region, as was already referred in previous reports for the oxygen reduction reaction with polycrystalline Pt, as well as with different Pt based nanocatalysts. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs. RHE), were compared to a carbon supported (Vulcan XC-72) catalyst. The Pt/[Sb-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The advantages of the carbon free support application in terms of the durability and stability of the catalysts were proved by accelerated stability tests.",
journal = "RSC Advances",
title = "Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions",
pages = "15923-15929",
volume = "5",
number = "21",
doi = "10.1039/c4ra13391a",
url = "https://hdl.handle.net/21.15107/rcub_dais_3354"
}

Elezović, N., Radmilović, V. R., Kovač, J., Babić, B. M., Gajić Krstajić, L.,& Krstajić, N.. (2015). Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions. in RSC Advances, 5(21), 15923-15929.
https://doi.org/10.1039/c4ra13391a
https://hdl.handle.net/21.15107/rcub_dais_3354

Elezović N, Radmilović VR, Kovač J, Babić BM, Gajić Krstajić L, Krstajić N. Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions. in RSC Advances. 2015;5(21):15923-15929.
doi:10.1039/c4ra13391a
https://hdl.handle.net/21.15107/rcub_dais_3354 .

Elezović, Nevenka, Radmilović, Velimir R., Kovač, Janez, Babić, Biljana M., Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, "Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions" in RSC Advances, 5, no. 21 (2015):15923-15929,
https://doi.org/10.1039/c4ra13391a .,
https://hdl.handle.net/21.15107/rcub_dais_3354 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/825
AB  - A comparative study on catalytic activity of platinum nanoparticles on different titanium oxide supports for proton exchange membrane fuel cells reactions was performed. Non stoichiometric titanium oxides – Ebonex, niobium doped titanium oxide and ruthenium doped titanium oxide were applied as the supporting materials. 
Platinum nanocatalysts (20% Pt) on different support were synthesized by impregnation or borohydride reduction method. Synthesized supports and catalyst were characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Homogenous Pt nanoparticles distribution over the niobium and ruthenium doped TiO2 support, without pronounced particle agglomeration was confirmed by HRTEM technique. The average Pt particle size was 3 nm and 5.4 nm for Pt at niobium doped TiO2 and ruthenium doped TiO2, respectively. However, it was not possible to determine accurately average Pt particle size at Ebonex support, due to the non-uniform distribution of the Pt nanoparticles. Electrochemically active Pt surface area of the catalysts was determined by integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage.
Kinetics of the oxygen reduction reaction at Pt nanocatalysts on different titanium based supports was studied by cyclic voltammetry and linear sweep voltammetry at rotating gold disc electrode. Two different Tafel slopes at Pt catalysts on niobium and ruthenium doped supports were observed: one close to 60 mV dec-1 in low current density region, and other ~120 mV dec-1 in higher current densities region. Only at Ebonex based support one single Tafel slope (~ 106 mV dec-1) was observed. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs RHE, where the mass transport contribution current can be neglected), were compared to carbon supported one, with the same Pt loading. Stability tests, by repetitive cycling from 0.03V to high anodic potentials (up to 1.4 V vs RHE) were performed. The advantages of carbon free supports application in terms of stability, durability and life time of the catalysts were discussed.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
T1  - Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications
SP  - 77
EP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_dais_825
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko",
year = "2015",
abstract = "A comparative study on catalytic activity of platinum nanoparticles on different titanium oxide supports for proton exchange membrane fuel cells reactions was performed. Non stoichiometric titanium oxides – Ebonex, niobium doped titanium oxide and ruthenium doped titanium oxide were applied as the supporting materials. 
Platinum nanocatalysts (20% Pt) on different support were synthesized by impregnation or borohydride reduction method. Synthesized supports and catalyst were characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Homogenous Pt nanoparticles distribution over the niobium and ruthenium doped TiO2 support, without pronounced particle agglomeration was confirmed by HRTEM technique. The average Pt particle size was 3 nm and 5.4 nm for Pt at niobium doped TiO2 and ruthenium doped TiO2, respectively. However, it was not possible to determine accurately average Pt particle size at Ebonex support, due to the non-uniform distribution of the Pt nanoparticles. Electrochemically active Pt surface area of the catalysts was determined by integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage.
Kinetics of the oxygen reduction reaction at Pt nanocatalysts on different titanium based supports was studied by cyclic voltammetry and linear sweep voltammetry at rotating gold disc electrode. Two different Tafel slopes at Pt catalysts on niobium and ruthenium doped supports were observed: one close to 60 mV dec-1 in low current density region, and other ~120 mV dec-1 in higher current densities region. Only at Ebonex based support one single Tafel slope (~ 106 mV dec-1) was observed. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs RHE, where the mass transport contribution current can be neglected), were compared to carbon supported one, with the same Pt loading. Stability tests, by repetitive cycling from 0.03V to high anodic potentials (up to 1.4 V vs RHE) were performed. The advantages of carbon free supports application in terms of stability, durability and life time of the catalysts were discussed.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015",
title = "Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications",
pages = "77-77",
url = "https://hdl.handle.net/21.15107/rcub_dais_825"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Radmilović, V. R.,& Krstajić, N.. (2015). Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
Belgrade : Materials Research Society of Serbia., 77-77.
https://hdl.handle.net/21.15107/rcub_dais_825

Gajić Krstajić L, Elezović N, Babić BM, Radmilović VR, Krstajić N. Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015. 2015;:77-77.
https://hdl.handle.net/21.15107/rcub_dais_825 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko, "Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications" in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015 (2015):77-77,
https://hdl.handle.net/21.15107/rcub_dais_825 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Kovač, Janez
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/560
AB  - Platinum on Sb doped tin oxide support (Sb/SnO2) was synthesized and characterized as the catalyst for oxygen reduction reaction in 0.1 mol dm-3NaOH solution, at 25oC. Sb (5%) doped tin oxide support was synthesized by sol-gel procedure. Platinum nanocatalyst (20% Pt) on Sb-SnO2 support was synthesized by borohydride reduction method. Synthesized support and catalyst were characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). XRD diffraction spectra of the support contained only SnO2 belonging peaks. X-ray photoelectron spectroscopy was applied to characterize chemical status of elements before and after Pt-treatment. XPS spectra Sn 3d, Pt 4f, Sb 3d and O 1s revealed that the Pt-deposition on Sb+SnO2 support induced reduction of Sn(4+) oxidation state to Sn(2+) and Sn(0) states, while Pt remained in metallic state and Sb was in (3+) oxidation state. Homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was confirmed by HRTEM technique. The average Pt particle size was 2.9 nm. Electrochemically active Pt surface area of the catalyst was determined by integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage. This calculation gave the value of 51 m2 g-1. Kinetics of the oxygen reduction reaction at Pt/Sb-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry at rotating gold disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other ~120 mV dec-1 in higher current densities region, as it was already referred in literature for oxygen reduction reaction at polycrystalline Pt, as well as at different Pt based nanocatalysts. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs RHE), were compared to carbon supported (Vulcan XC-72) catalyst. Pt/Sb-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The advantages of carbon free support application in terms of durability and stability of the catalysts were discussed.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution
SP  - 90
EP  - 90
UR  - https://hdl.handle.net/21.15107/rcub_dais_560
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Kovač, Janez and Radmilović, Velimir R. and Krstajić, Nedeljko",
year = "2014",
abstract = "Platinum on Sb doped tin oxide support (Sb/SnO2) was synthesized and characterized as the catalyst for oxygen reduction reaction in 0.1 mol dm-3NaOH solution, at 25oC. Sb (5%) doped tin oxide support was synthesized by sol-gel procedure. Platinum nanocatalyst (20% Pt) on Sb-SnO2 support was synthesized by borohydride reduction method. Synthesized support and catalyst were characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). XRD diffraction spectra of the support contained only SnO2 belonging peaks. X-ray photoelectron spectroscopy was applied to characterize chemical status of elements before and after Pt-treatment. XPS spectra Sn 3d, Pt 4f, Sb 3d and O 1s revealed that the Pt-deposition on Sb+SnO2 support induced reduction of Sn(4+) oxidation state to Sn(2+) and Sn(0) states, while Pt remained in metallic state and Sb was in (3+) oxidation state. Homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was confirmed by HRTEM technique. The average Pt particle size was 2.9 nm. Electrochemically active Pt surface area of the catalyst was determined by integration of the cyclic voltammetry curve in the potential region of underpotential deposition of hydrogen, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage. This calculation gave the value of 51 m2 g-1. Kinetics of the oxygen reduction reaction at Pt/Sb-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry at rotating gold disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other ~120 mV dec-1 in higher current densities region, as it was already referred in literature for oxygen reduction reaction at polycrystalline Pt, as well as at different Pt based nanocatalysts. The specific activities for oxygen reduction, expressed in terms of kinetic current densities per electrochemically Pt active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest (0.85 V and 0.90 V vs RHE), were compared to carbon supported (Vulcan XC-72) catalyst. Pt/Sb-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The advantages of carbon free support application in terms of durability and stability of the catalysts were discussed.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution",
pages = "90-90",
url = "https://hdl.handle.net/21.15107/rcub_dais_560"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Kovač, J., Radmilović, V. R.,& Krstajić, N.. (2014). Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 90-90.
https://hdl.handle.net/21.15107/rcub_dais_560

Gajić Krstajić L, Elezović N, Babić BM, Kovač J, Radmilović VR, Krstajić N. Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:90-90.
https://hdl.handle.net/21.15107/rcub_dais_560 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Kovač, Janez, Radmilović, Velimir R., Krstajić, Nedeljko, "Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution" in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):90-90,
https://hdl.handle.net/21.15107/rcub_dais_560 .

TY  - JOUR
AU  - Jović, Vladimir
AU  - Lačnjevac, Uroš
AU  - Jović, Borka
AU  - Gajić Krstajić, Ljiljana
AU  - Krstajić, Nedeljko
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/256
AB  - In this work the effect of aging of the electrolyte for electrodeposition of Ni-MoO2 composite coatings on their morphology (scanning electron microscopy), chemical composition (energy-dispersive X-ray spectroscopy), polarization characteristics and the “service life” test performance for the hydrogen evolution reaction (HER) in 32 mass % NaOH at 90°C was investigated. Polarization characteristics and results of the “service life” test of Ni-MoO2 composite coatings obtained after different aging periods of the electrolyte for deposition (suspension of MoO2 powder particles in the solution containing 2 M NH4Cl + 0.2 M NiCl2) were compared with that recorded for De Nora’s commercial Ni+RuO2 cathode coating (DN). It was shown that aging of the electrolyte did not influence the morphology and chemical composition of Ni-MoO2 composite coatings electrodeposited under simulated conditions for their industrial production, while polarization characteristics for the HER were influenced. The best coating, obtained after 180 days of the electrolyte aging, showed completely different (layered) structure of the deposit and significantly better performance than the commercial DN electrode during the “service life” test. [Projekat Ministarstva nauke Republike Srbije, br. 172054]
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Ni-MoO2 composite cathodes for hydrogen evolution in alkaline solution: Effect of aging of the electrolyte for their electrodeposition
SP  - 689
EP  - 700
VL  - 78
IS  - 5
DO  - 10.2298/JSC120831112J
UR  - https://hdl.handle.net/21.15107/rcub_dais_256
ER  - 

@article{
author = "Jović, Vladimir and Lačnjevac, Uroš and Jović, Borka and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko",
year = "2013",
abstract = "In this work the effect of aging of the electrolyte for electrodeposition of Ni-MoO2 composite coatings on their morphology (scanning electron microscopy), chemical composition (energy-dispersive X-ray spectroscopy), polarization characteristics and the “service life” test performance for the hydrogen evolution reaction (HER) in 32 mass % NaOH at 90°C was investigated. Polarization characteristics and results of the “service life” test of Ni-MoO2 composite coatings obtained after different aging periods of the electrolyte for deposition (suspension of MoO2 powder particles in the solution containing 2 M NH4Cl + 0.2 M NiCl2) were compared with that recorded for De Nora’s commercial Ni+RuO2 cathode coating (DN). It was shown that aging of the electrolyte did not influence the morphology and chemical composition of Ni-MoO2 composite coatings electrodeposited under simulated conditions for their industrial production, while polarization characteristics for the HER were influenced. The best coating, obtained after 180 days of the electrolyte aging, showed completely different (layered) structure of the deposit and significantly better performance than the commercial DN electrode during the “service life” test. [Projekat Ministarstva nauke Republike Srbije, br. 172054]",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Ni-MoO2 composite cathodes for hydrogen evolution in alkaline solution: Effect of aging of the electrolyte for their electrodeposition",
pages = "689-700",
volume = "78",
number = "5",
doi = "10.2298/JSC120831112J",
url = "https://hdl.handle.net/21.15107/rcub_dais_256"
}

Jović, V., Lačnjevac, U., Jović, B., Gajić Krstajić, L.,& Krstajić, N.. (2013). Ni-MoO2 composite cathodes for hydrogen evolution in alkaline solution: Effect of aging of the electrolyte for their electrodeposition. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 78(5), 689-700.
https://doi.org/10.2298/JSC120831112J
https://hdl.handle.net/21.15107/rcub_dais_256

Jović V, Lačnjevac U, Jović B, Gajić Krstajić L, Krstajić N. Ni-MoO2 composite cathodes for hydrogen evolution in alkaline solution: Effect of aging of the electrolyte for their electrodeposition. in Journal of the Serbian Chemical Society. 2013;78(5):689-700.
doi:10.2298/JSC120831112J
https://hdl.handle.net/21.15107/rcub_dais_256 .

Jović, Vladimir, Lačnjevac, Uroš, Jović, Borka, Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, "Ni-MoO2 composite cathodes for hydrogen evolution in alkaline solution: Effect of aging of the electrolyte for their electrodeposition" in Journal of the Serbian Chemical Society, 78, no. 5 (2013):689-700,
https://doi.org/10.2298/JSC120831112J .,
https://hdl.handle.net/21.15107/rcub_dais_256 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/392
AB  - Platinum nanocatalyst on Ru doped tin oxide support (Ru-SnO2) was synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Ru doped tin oxide support was synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction, HRTEM (high resolution transmission electron microscopy) and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 141 m2 g-1. XRD spectra contained mainly SnO2 belonging peaks. The corresponding crystallite size for Ru-SnO2, determined by Scherrer's equation was 4nm. Platinum nanocatalyst at Ru-SnO2 support was synthesized by borohydride reduction method and characterized by X-ray and TEM techniques. Homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was confirmed. The average Pt particle size was 5.3 nm. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/Ru-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest, were compared to carbon supported (Vulcan XC-72) catalyst. Pt/Ru-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The durability of the catalysts was evaluated by repetitive cycling up to 1.4 V vs RHE. Better stability of Pt/Ru-SnO2 catalyst compared to Pt on carbon support was confirmed by determination of the loss of platinum electrochemically active surface area after potential cycling tests.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction
SP  - 72
EP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_dais_392
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko",
year = "2013",
abstract = "Platinum nanocatalyst on Ru doped tin oxide support (Ru-SnO2) was synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Ru doped tin oxide support was synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction, HRTEM (high resolution transmission electron microscopy) and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 141 m2 g-1. XRD spectra contained mainly SnO2 belonging peaks. The corresponding crystallite size for Ru-SnO2, determined by Scherrer's equation was 4nm. Platinum nanocatalyst at Ru-SnO2 support was synthesized by borohydride reduction method and characterized by X-ray and TEM techniques. Homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was confirmed. The average Pt particle size was 5.3 nm. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge correction, taking into account the reference value of 210 μC cm-2 for full monolayer coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/Ru-SnO2 catalyst was studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area, as well as per mass of Pt loaded, at the constant potential of practical interest, were compared to carbon supported (Vulcan XC-72) catalyst. Pt/Ru-SnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction like carbon supported one. The durability of the catalysts was evaluated by repetitive cycling up to 1.4 V vs RHE. Better stability of Pt/Ru-SnO2 catalyst compared to Pt on carbon support was confirmed by determination of the loss of platinum electrochemically active surface area after potential cycling tests.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction",
pages = "72-72",
url = "https://hdl.handle.net/21.15107/rcub_dais_392"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Radmilović, V. R.,& Krstajić, N.. (2013). Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 72-72.
https://hdl.handle.net/21.15107/rcub_dais_392

Gajić Krstajić L, Elezović N, Babić BM, Radmilović VR, Krstajić N. Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:72-72.
https://hdl.handle.net/21.15107/rcub_dais_392 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko, "Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):72-72,
https://hdl.handle.net/21.15107/rcub_dais_392 .

TY  - JOUR
AU  - Lačnjevac, Uroš
AU  - Jović, Borka
AU  - Gajić Krstajić, Ljiljana
AU  - Kovač, Janez
AU  - Jović, Vladimir
AU  - Krstajić, Nedeljko
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/358
AB  - The aim of this work was to investigate the possibility of preparation of the composite Cr–MoO2 coatings onto steel and titanium substrates as cathode materials with high selective properties which imply the suppression of hypochlorite reduction as a side reaction during hypochlorite commercial production. The electrodes were prepared by simultaneous deposition of chromium and suspended MoO2 particles on titanium substrate from acid chromium (VI) bath. The current efficiency for electrodeposition of the composite coatings did not vary significantly with the concentration of suspended MoO2 particles. The content of molybdenum in the deposits was relatively low (0.2–1.5 at.%) and increased with increasing the concentration of suspended MoO2 particles in the bath, in the range from 0 to 10 g dm−3. With further increase in the concentration of MoO2, the content of molybdenum in the coating varied insignificantly.

X-ray photoelectron spectroscopy-XPS and EDS analysis were applied to analyze elemental composition and chemical bonding of elements on the surface and in the sub-surface region of obtained coatings. When the concentration of MoO2 particles in the bath was raised above 5 g dm−3, the appearance of the coating changed from the typical pure chromium deposit to needle-like deposit with the appearance of black inclusions on the surface. XPS analysis and corresponding Cr 2p spectra showed the presence of chromium oxide, probably Cr2O3 with Cr(3+) valence state on the surface and in the sub-surface region of Cr–MoO2 coatings.

Investigation of the current efficiency for the hydrogen evolution reaction (HER) on Cr–MoO2 cathodes showed that it increased with the increase of the content of MoO2 particles in the coating, exceeding the value of 97% in the solution with the hypochlorite concentration of 0.21 mol dm−3. Under the same conditions, the current efficiency for the HER on Ti and Ti/Cr cathodes is very low (≈20%), and corresponding polarization curves confirmed the fact that the side reaction of hypochlorite reduction takes place in the diffusion-controlled regime on these electrodes. The high selectivity of Cr–MoO2 coating is probably caused by the presence of chromium oxide (hydroxide) formed at the surface of the coating during co-deposition of Cr and MoO2 particles, which prevents hypochlorite reduction on the cathode during the HER.
PB  - Elsevier
T2  - Electrochimica Acta
T1  - Ti substrate coated with composite Cr–MoO2 coatings as highly selective cathode materials in hypochlorite production
SP  - 34
EP  - 42
VL  - 96
IS  - 30
DO  - 10.1016/j.electacta.2013.02.086
UR  - https://hdl.handle.net/21.15107/rcub_dais_358
ER  - 

@article{
author = "Lačnjevac, Uroš and Jović, Borka and Gajić Krstajić, Ljiljana and Kovač, Janez and Jović, Vladimir and Krstajić, Nedeljko",
year = "2013",
abstract = "The aim of this work was to investigate the possibility of preparation of the composite Cr–MoO2 coatings onto steel and titanium substrates as cathode materials with high selective properties which imply the suppression of hypochlorite reduction as a side reaction during hypochlorite commercial production. The electrodes were prepared by simultaneous deposition of chromium and suspended MoO2 particles on titanium substrate from acid chromium (VI) bath. The current efficiency for electrodeposition of the composite coatings did not vary significantly with the concentration of suspended MoO2 particles. The content of molybdenum in the deposits was relatively low (0.2–1.5 at.%) and increased with increasing the concentration of suspended MoO2 particles in the bath, in the range from 0 to 10 g dm−3. With further increase in the concentration of MoO2, the content of molybdenum in the coating varied insignificantly.

X-ray photoelectron spectroscopy-XPS and EDS analysis were applied to analyze elemental composition and chemical bonding of elements on the surface and in the sub-surface region of obtained coatings. When the concentration of MoO2 particles in the bath was raised above 5 g dm−3, the appearance of the coating changed from the typical pure chromium deposit to needle-like deposit with the appearance of black inclusions on the surface. XPS analysis and corresponding Cr 2p spectra showed the presence of chromium oxide, probably Cr2O3 with Cr(3+) valence state on the surface and in the sub-surface region of Cr–MoO2 coatings.

Investigation of the current efficiency for the hydrogen evolution reaction (HER) on Cr–MoO2 cathodes showed that it increased with the increase of the content of MoO2 particles in the coating, exceeding the value of 97% in the solution with the hypochlorite concentration of 0.21 mol dm−3. Under the same conditions, the current efficiency for the HER on Ti and Ti/Cr cathodes is very low (≈20%), and corresponding polarization curves confirmed the fact that the side reaction of hypochlorite reduction takes place in the diffusion-controlled regime on these electrodes. The high selectivity of Cr–MoO2 coating is probably caused by the presence of chromium oxide (hydroxide) formed at the surface of the coating during co-deposition of Cr and MoO2 particles, which prevents hypochlorite reduction on the cathode during the HER.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Ti substrate coated with composite Cr–MoO2 coatings as highly selective cathode materials in hypochlorite production",
pages = "34-42",
volume = "96",
number = "30",
doi = "10.1016/j.electacta.2013.02.086",
url = "https://hdl.handle.net/21.15107/rcub_dais_358"
}

Lačnjevac, U., Jović, B., Gajić Krstajić, L., Kovač, J., Jović, V.,& Krstajić, N.. (2013). Ti substrate coated with composite Cr–MoO2 coatings as highly selective cathode materials in hypochlorite production. in Electrochimica Acta
Elsevier., 96(30), 34-42.
https://doi.org/10.1016/j.electacta.2013.02.086
https://hdl.handle.net/21.15107/rcub_dais_358

Lačnjevac U, Jović B, Gajić Krstajić L, Kovač J, Jović V, Krstajić N. Ti substrate coated with composite Cr–MoO2 coatings as highly selective cathode materials in hypochlorite production. in Electrochimica Acta. 2013;96(30):34-42.
doi:10.1016/j.electacta.2013.02.086
https://hdl.handle.net/21.15107/rcub_dais_358 .

Lačnjevac, Uroš, Jović, Borka, Gajić Krstajić, Ljiljana, Kovač, Janez, Jović, Vladimir, Krstajić, Nedeljko, "Ti substrate coated with composite Cr–MoO2 coatings as highly selective cathode materials in hypochlorite production" in Electrochimica Acta, 96, no. 30 (2013):34-42,
https://doi.org/10.1016/j.electacta.2013.02.086 .,
https://hdl.handle.net/21.15107/rcub_dais_358 .

TY  - JOUR
AU  - Jović, Borka
AU  - Lačnjevac, Uroš
AU  - Jović, Vladimir
AU  - Gajić Krstajić, Ljiljana
AU  - Krstajić, Nedeljko
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/258
AB  - MoO3 particles were co-deposited with Ni onto smooth or rough Ni supports from modified Watt’s baths of different compositions. Morphology and composition of the electrodeposits were characterized by means of cyclic voltammetry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy. The electrocatalytic activity of the composite catalysts for H2 evolution in alkaline solutions was determined by quasi-stationary polarization curves. Activity increases with MoOx content in the Ni deposit up to a limiting value. Composite Ni-MoOx catalyst performed high catalytic activity, similar to that of commercial Ni-RuO2 catalyst. Stability tests showed that Ni-MoOx codeposits are stable under condition of constant current and exhibit excellent tolerance to repeated short-circuiting.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - On the kinetics of the hydrogen evolution reaction on Ni-MoOx composite catalysts in alkaline solutions
SP  - 211
EP  - 224
VL  - 77
IS  - 2
DO  - 10.2298/JSC110621185J
UR  - https://hdl.handle.net/21.15107/rcub_dais_258
ER  - 

@article{
author = "Jović, Borka and Lačnjevac, Uroš and Jović, Vladimir and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko",
year = "2012",
abstract = "MoO3 particles were co-deposited with Ni onto smooth or rough Ni supports from modified Watt’s baths of different compositions. Morphology and composition of the electrodeposits were characterized by means of cyclic voltammetry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy. The electrocatalytic activity of the composite catalysts for H2 evolution in alkaline solutions was determined by quasi-stationary polarization curves. Activity increases with MoOx content in the Ni deposit up to a limiting value. Composite Ni-MoOx catalyst performed high catalytic activity, similar to that of commercial Ni-RuO2 catalyst. Stability tests showed that Ni-MoOx codeposits are stable under condition of constant current and exhibit excellent tolerance to repeated short-circuiting.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "On the kinetics of the hydrogen evolution reaction on Ni-MoOx composite catalysts in alkaline solutions",
pages = "211-224",
volume = "77",
number = "2",
doi = "10.2298/JSC110621185J",
url = "https://hdl.handle.net/21.15107/rcub_dais_258"
}

Jović, B., Lačnjevac, U., Jović, V., Gajić Krstajić, L.,& Krstajić, N.. (2012). On the kinetics of the hydrogen evolution reaction on Ni-MoOx composite catalysts in alkaline solutions. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 77(2), 211-224.
https://doi.org/10.2298/JSC110621185J
https://hdl.handle.net/21.15107/rcub_dais_258

Jović B, Lačnjevac U, Jović V, Gajić Krstajić L, Krstajić N. On the kinetics of the hydrogen evolution reaction on Ni-MoOx composite catalysts in alkaline solutions. in Journal of the Serbian Chemical Society. 2012;77(2):211-224.
doi:10.2298/JSC110621185J
https://hdl.handle.net/21.15107/rcub_dais_258 .

Jović, Borka, Lačnjevac, Uroš, Jović, Vladimir, Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, "On the kinetics of the hydrogen evolution reaction on Ni-MoOx composite catalysts in alkaline solutions" in Journal of the Serbian Chemical Society, 77, no. 2 (2012):211-224,
https://doi.org/10.2298/JSC110621185J .,
https://hdl.handle.net/21.15107/rcub_dais_258 .

TY  - JOUR
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Gajić Krstajić, Ljiljana
AU  - Ercius, Peter
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/465
AB  - Platinum nanocatalyst at nano-tungsten carbide was synthesized, characterized and tested for oxygen reduction reaction (ORR) in 0.1 mol dm−3 NaOH, at 25 °C. Tungsten-carbide islands on nano-tungsten particles (WC) was synthesized from gel prepared by using nanoparticles of WO3, previously produced from W-powder oxidized in H2O2. The support was porous material with high specific surface area (177 m2 g−1).

The WC supported Pt (10 wt.%) catalyst was prepared by borohydride reduction method.

X-ray diffraction of the catalyst demonstrates successful reduction of Pt precursor to metallic form. STEM analysis of Pt/WC catalyst showed the existence of Pt particles lower than 2 nm in size, even the clusters of Pt atoms.

Electrochemically active surface area of Pt was determined from adsorption/desorption charge of hydrogen atoms.

Catalytic activity of the synthesized catalyst for ORR was studied by cyclic voltammetry and linear sweep voltammetry at rotating disk electrode. The onset potential on Pt/WC for ORR, comparing with Pt/Vulcan, was shifted to the positive potentials for about 150 mV. Pt/WC catalyst shows one Tafel slope of −0.105 V dec−1, remarkable catalytic activity expressed either through the value of the current density per real surface area, or through the mass activity and excellent stability.
PB  - Elsevier
T2  - Electrochimica Acta
T1  - Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution
SP  - 239
EP  - 246
DO  - 10.1016/j.electacta.2012.02.105
UR  - https://hdl.handle.net/21.15107/rcub_dais_465
ER  - 

@article{
author = "Elezović, Nevenka and Babić, Biljana M. and Gajić Krstajić, Ljiljana and Ercius, Peter and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2012",
abstract = "Platinum nanocatalyst at nano-tungsten carbide was synthesized, characterized and tested for oxygen reduction reaction (ORR) in 0.1 mol dm−3 NaOH, at 25 °C. Tungsten-carbide islands on nano-tungsten particles (WC) was synthesized from gel prepared by using nanoparticles of WO3, previously produced from W-powder oxidized in H2O2. The support was porous material with high specific surface area (177 m2 g−1).

The WC supported Pt (10 wt.%) catalyst was prepared by borohydride reduction method.

X-ray diffraction of the catalyst demonstrates successful reduction of Pt precursor to metallic form. STEM analysis of Pt/WC catalyst showed the existence of Pt particles lower than 2 nm in size, even the clusters of Pt atoms.

Electrochemically active surface area of Pt was determined from adsorption/desorption charge of hydrogen atoms.

Catalytic activity of the synthesized catalyst for ORR was studied by cyclic voltammetry and linear sweep voltammetry at rotating disk electrode. The onset potential on Pt/WC for ORR, comparing with Pt/Vulcan, was shifted to the positive potentials for about 150 mV. Pt/WC catalyst shows one Tafel slope of −0.105 V dec−1, remarkable catalytic activity expressed either through the value of the current density per real surface area, or through the mass activity and excellent stability.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution",
pages = "239-246",
doi = "10.1016/j.electacta.2012.02.105",
url = "https://hdl.handle.net/21.15107/rcub_dais_465"
}

Elezović, N., Babić, B. M., Gajić Krstajić, L., Ercius, P., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2012). Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution. in Electrochimica Acta
Elsevier., 239-246.
https://doi.org/10.1016/j.electacta.2012.02.105
https://hdl.handle.net/21.15107/rcub_dais_465

Elezović N, Babić BM, Gajić Krstajić L, Ercius P, Radmilović VR, Krstajić N, Vračar L. Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution. in Electrochimica Acta. 2012;:239-246.
doi:10.1016/j.electacta.2012.02.105
https://hdl.handle.net/21.15107/rcub_dais_465 .

Elezović, Nevenka, Babić, Biljana M., Gajić Krstajić, Ljiljana, Ercius, Peter, Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution" in Electrochimica Acta (2012):239-246,
https://doi.org/10.1016/j.electacta.2012.02.105 .,
https://hdl.handle.net/21.15107/rcub_dais_465 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/436
AB  - Platinum nanocatalyst on Sb doped tin oxide support has been synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Sb doped tin oxide support has been synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 42 m2 g-1. Platinum nanocatalyst at modified tin oxide support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. Quite homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was observed. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/SbSnO2 catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. Pt/SbSnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction compared to carbon supported one. Better durability of Pt/SbSnO2 catalyst under repetitive cycling up to 1.4 V vs RHE was confirmed, comparing with Pt on carbon support.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
T1  - Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction
SP  - 56
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_dais_436
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2012",
abstract = "Platinum nanocatalyst on Sb doped tin oxide support has been synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Sb doped tin oxide support has been synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 42 m2 g-1. Platinum nanocatalyst at modified tin oxide support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. Quite homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was observed. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/SbSnO2 catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. Pt/SbSnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction compared to carbon supported one. Better durability of Pt/SbSnO2 catalyst under repetitive cycling up to 1.4 V vs RHE was confirmed, comparing with Pt on carbon support.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts",
title = "Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction",
pages = "56-56",
url = "https://hdl.handle.net/21.15107/rcub_dais_436"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2012). Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 56-56.
https://hdl.handle.net/21.15107/rcub_dais_436

Gajić Krstajić L, Elezović N, Babić BM, Radmilović VR, Krstajić N, Vračar L. Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:56-56.
https://hdl.handle.net/21.15107/rcub_dais_436 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction" in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):56-56,
https://hdl.handle.net/21.15107/rcub_dais_436 .

TY  - JOUR
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Gajić Krstajić, Ljiljana
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/260
AB  - The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-δ-0.995TiO2 (0<δ<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42±4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan® XC-72R high area carbon.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction
SP  - 1139
EP  - 1152
VL  - 76
IS  - 8
DO  - 10.2298/JSC100823100E
UR  - https://hdl.handle.net/21.15107/rcub_dais_260
ER  - 

@article{
author = "Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2011",
abstract = "The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-δ-0.995TiO2 (0<δ<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42±4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan® XC-72R high area carbon.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction",
pages = "1139-1152",
volume = "76",
number = "8",
doi = "10.2298/JSC100823100E",
url = "https://hdl.handle.net/21.15107/rcub_dais_260"
}

Elezović, N., Babić, B. M., Radmilović, V. R., Gajić Krstajić, L., Krstajić, N.,& Vračar, L.. (2011). A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 76(8), 1139-1152.
https://doi.org/10.2298/JSC100823100E
https://hdl.handle.net/21.15107/rcub_dais_260

Elezović N, Babić BM, Radmilović VR, Gajić Krstajić L, Krstajić N, Vračar L. A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction. in Journal of the Serbian Chemical Society. 2011;76(8):1139-1152.
doi:10.2298/JSC100823100E
https://hdl.handle.net/21.15107/rcub_dais_260 .

Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, Vračar, Ljiljana, "A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction" in Journal of the Serbian Chemical Society, 76, no. 8 (2011):1139-1152,
https://doi.org/10.2298/JSC100823100E .,
https://hdl.handle.net/21.15107/rcub_dais_260 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Ercius, Peter
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/155
AB  - Poster presented at the 13th Annual Conference of the Materials Research Society of Serbia - YUCOMAT 2011, Herceg Novi, Montenegro, September 5–9, 2011
T1  - Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications
UR  - https://hdl.handle.net/21.15107/rcub_dais_155
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Ercius, Peter and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2011",
abstract = "Poster presented at the 13th Annual Conference of the Materials Research Society of Serbia - YUCOMAT 2011, Herceg Novi, Montenegro, September 5–9, 2011",
title = "Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications",
url = "https://hdl.handle.net/21.15107/rcub_dais_155"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Ercius, P., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2011). Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications. .
https://hdl.handle.net/21.15107/rcub_dais_155

Gajić Krstajić L, Elezović N, Babić BM, Ercius P, Radmilović VR, Krstajić N, Vračar L. Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications. 2011;.
https://hdl.handle.net/21.15107/rcub_dais_155 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Ercius, Peter, Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications" (2011),
https://hdl.handle.net/21.15107/rcub_dais_155 .

TY  - JOUR
AU  - Krstajić, Nedeljko
AU  - Gajić Krstajić, Ljiljana
AU  - Lačnjevac, Uroš
AU  - Jović, Borka
AU  - Mora, S.
AU  - Jović, Vladimir
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/709
AB  - In this work the Ni–MoOx coatings have been prepared and characterized in view of their possible application as electrocatalysts for hydrogen evolution reaction (HER) in alkaline solution. The procedure of deposition of Ni–MoOx coatings from the Watt’s type bath containing MoO3 powder particles onto Ni mesh, under the conditions of simulated industrial deposition conditions for commercial cathodes, has been presented. The morphology of the obtained coatings was investigated by SEM, the composition by EDS and the phase composition by XRD techniques. The polarization characteristics for hydrogen evolution on the obtained Ni–MoOx coatings were investigated in the 32 wt.% NaOH at 90 °C and compared with the one recorded for the commercial De Nora’s coating (DN). It was shown that the best Ni–MoOx coating exhibits almost identical polarization characteristics as the commercial one. By the cross section and XRD analysis of deposited samples it was confirmed that MoO3 powder particles were not occluded by the Ni deposit and that molybdenum species were deposited from the molybdate ions formed by dissolution of MoO3, following the mechanism of induced co-deposition. The reaction mechanism for MoO3 phase deposition has also been proposed.
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - Non-noble metal composite cathodes for hydrogen evolution. Part I: The Ni–MoOx coatings electrodeposited from Watt’s type bath containing MoO3 powder particles
SP  - 6441
EP  - 6449
DO  - 10.1016/j.ijhydene.2011.02.105
UR  - https://hdl.handle.net/21.15107/rcub_dais_709
ER  - 

@article{
author = "Krstajić, Nedeljko and Gajić Krstajić, Ljiljana and Lačnjevac, Uroš and Jović, Borka and Mora, S. and Jović, Vladimir",
year = "2011",
abstract = "In this work the Ni–MoOx coatings have been prepared and characterized in view of their possible application as electrocatalysts for hydrogen evolution reaction (HER) in alkaline solution. The procedure of deposition of Ni–MoOx coatings from the Watt’s type bath containing MoO3 powder particles onto Ni mesh, under the conditions of simulated industrial deposition conditions for commercial cathodes, has been presented. The morphology of the obtained coatings was investigated by SEM, the composition by EDS and the phase composition by XRD techniques. The polarization characteristics for hydrogen evolution on the obtained Ni–MoOx coatings were investigated in the 32 wt.% NaOH at 90 °C and compared with the one recorded for the commercial De Nora’s coating (DN). It was shown that the best Ni–MoOx coating exhibits almost identical polarization characteristics as the commercial one. By the cross section and XRD analysis of deposited samples it was confirmed that MoO3 powder particles were not occluded by the Ni deposit and that molybdenum species were deposited from the molybdate ions formed by dissolution of MoO3, following the mechanism of induced co-deposition. The reaction mechanism for MoO3 phase deposition has also been proposed.",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "Non-noble metal composite cathodes for hydrogen evolution. Part I: The Ni–MoOx coatings electrodeposited from Watt’s type bath containing MoO3 powder particles",
pages = "6441-6449",
doi = "10.1016/j.ijhydene.2011.02.105",
url = "https://hdl.handle.net/21.15107/rcub_dais_709"
}

Krstajić, N., Gajić Krstajić, L., Lačnjevac, U., Jović, B., Mora, S.,& Jović, V.. (2011). Non-noble metal composite cathodes for hydrogen evolution. Part I: The Ni–MoOx coatings electrodeposited from Watt’s type bath containing MoO3 powder particles. in International Journal of Hydrogen Energy
Elsevier., 6441-6449.
https://doi.org/10.1016/j.ijhydene.2011.02.105
https://hdl.handle.net/21.15107/rcub_dais_709

Krstajić N, Gajić Krstajić L, Lačnjevac U, Jović B, Mora S, Jović V. Non-noble metal composite cathodes for hydrogen evolution. Part I: The Ni–MoOx coatings electrodeposited from Watt’s type bath containing MoO3 powder particles. in International Journal of Hydrogen Energy. 2011;:6441-6449.
doi:10.1016/j.ijhydene.2011.02.105
https://hdl.handle.net/21.15107/rcub_dais_709 .

Krstajić, Nedeljko, Gajić Krstajić, Ljiljana, Lačnjevac, Uroš, Jović, Borka, Mora, S., Jović, Vladimir, "Non-noble metal composite cathodes for hydrogen evolution. Part I: The Ni–MoOx coatings electrodeposited from Watt’s type bath containing MoO3 powder particles" in International Journal of Hydrogen Energy (2011):6441-6449,
https://doi.org/10.1016/j.ijhydene.2011.02.105 .,
https://hdl.handle.net/21.15107/rcub_dais_709 .

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljubomir
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/676
AB  - Platinum nanocatalyst on tungsten based support has been synthesized and characterized as catalyst for oxygen reduction reaction in 0.1 mol dm-3 NaOH solution. Tungsten based support - WxC has been synthesized by modified Ganesan et al. procedure. Synthesized support was characterized by BET, XRD and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was found to be 177 m2 g-1. Platinum nanocatalyst at WxC support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. It was found homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration. Electrochemically active surface area of the catalyst determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species, was found to be 40 m2 g-1. The oxygen reduction reaction at WxC/Pt catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Single Tafel slope was observed (value of -0.105 mV dec-1), close to the slope at high current densities, for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles. The specific activities, expressed in terms of kinetic current densities per real surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. WxC/Pt catalyst exhibited better catalytic activity for oxygen reduction reaction, as well as better durability comparing with Vulcan/Pt one.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
T1  - Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications
SP  - 92
EP  - 92
UR  - https://hdl.handle.net/21.15107/rcub_dais_676
ER  - 

@conference{
author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljubomir",
year = "2011",
abstract = "Platinum nanocatalyst on tungsten based support has been synthesized and characterized as catalyst for oxygen reduction reaction in 0.1 mol dm-3 NaOH solution. Tungsten based support - WxC has been synthesized by modified Ganesan et al. procedure. Synthesized support was characterized by BET, XRD and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was found to be 177 m2 g-1. Platinum nanocatalyst at WxC support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. It was found homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration. Electrochemically active surface area of the catalyst determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species, was found to be 40 m2 g-1. The oxygen reduction reaction at WxC/Pt catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Single Tafel slope was observed (value of -0.105 mV dec-1), close to the slope at high current densities, for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles. The specific activities, expressed in terms of kinetic current densities per real surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. WxC/Pt catalyst exhibited better catalytic activity for oxygen reduction reaction, as well as better durability comparing with Vulcan/Pt one.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts",
title = "Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications",
pages = "92-92",
url = "https://hdl.handle.net/21.15107/rcub_dais_676"
}

Gajić Krstajić, L., Elezović, N., Babić, B. M., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2011). Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 92-92.
https://hdl.handle.net/21.15107/rcub_dais_676

Gajić Krstajić L, Elezović N, Babić BM, Radmilović VR, Krstajić N, Vračar L. Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts. 2011;:92-92.
https://hdl.handle.net/21.15107/rcub_dais_676 .

Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljubomir, "Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications" in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts (2011):92-92,
https://hdl.handle.net/21.15107/rcub_dais_676 .

TY  - JOUR
AU  - Elezović, Nevenka R.
AU  - Babić, Biljana M.
AU  - Gajić Krstajić, Ljiljana
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2010
UR  - https://dais.sanu.ac.rs/123456789/3418
AB  - In order to point out the effect of the support to the catalyst for oxygen reduction reaction nano-crystalline Nb-doped TiO2 was synthesized through a modified sol-gel route procedure. The specific surface area of the support, SBET, and pore size distribution, were calculated from the adsorption isotherms using the gravimetric McBain method. The support was characterized by X-ray diffraction (XRD) technique. The borohydride reduction method was used to prepare Nb-TiO2 supported Pt (20 wt.%) catalyst. The synthesized catalyst was analyzed by TEM technique. Finally, the catalytic activity of this new catalyst for oxygen reduction reaction was investigated in acid solution, in the absence and the presence of methanol, and its activity was compared towards the results on C/Pt catalysts. Kinetic analysis reveals that the oxygen reduction reaction on Nb-TiO2/Pt catalyst follows four-electron process leading to water, as in the case of C/Pt electrode, but the Tafel plots normalized to the electrochemically active surface area show very remarkable enhancement in activity of Nb-TiO2/Pt expressed through the value of the current density at the constant potential. Moreover, Nb-TiO2/Pt catalyst exhibits higher methanol tolerance during the oxygen reduction reaction than the C/Pt catalyst. The enhancement in the activity of Nb-TiO2/Pt is consequence of both: the interactions of Pt nanoparticles with the support and the energy shift of the surface d-states with respect to the Fermi level what changes the surface reactivity. © 2010 Elsevier B.V.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction
SP  - 3961
EP  - 3968
VL  - 195
IS  - 13
DO  - 10.1016/j.jpowsour.2010.01.035
UR  - https://hdl.handle.net/21.15107/rcub_dais_3418
ER  - 

@article{
author = "Elezović, Nevenka R. and Babić, Biljana M. and Gajić Krstajić, Ljiljana and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2010",
abstract = "In order to point out the effect of the support to the catalyst for oxygen reduction reaction nano-crystalline Nb-doped TiO2 was synthesized through a modified sol-gel route procedure. The specific surface area of the support, SBET, and pore size distribution, were calculated from the adsorption isotherms using the gravimetric McBain method. The support was characterized by X-ray diffraction (XRD) technique. The borohydride reduction method was used to prepare Nb-TiO2 supported Pt (20 wt.%) catalyst. The synthesized catalyst was analyzed by TEM technique. Finally, the catalytic activity of this new catalyst for oxygen reduction reaction was investigated in acid solution, in the absence and the presence of methanol, and its activity was compared towards the results on C/Pt catalysts. Kinetic analysis reveals that the oxygen reduction reaction on Nb-TiO2/Pt catalyst follows four-electron process leading to water, as in the case of C/Pt electrode, but the Tafel plots normalized to the electrochemically active surface area show very remarkable enhancement in activity of Nb-TiO2/Pt expressed through the value of the current density at the constant potential. Moreover, Nb-TiO2/Pt catalyst exhibits higher methanol tolerance during the oxygen reduction reaction than the C/Pt catalyst. The enhancement in the activity of Nb-TiO2/Pt is consequence of both: the interactions of Pt nanoparticles with the support and the energy shift of the surface d-states with respect to the Fermi level what changes the surface reactivity. © 2010 Elsevier B.V.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction",
pages = "3961-3968",
volume = "195",
number = "13",
doi = "10.1016/j.jpowsour.2010.01.035",
url = "https://hdl.handle.net/21.15107/rcub_dais_3418"
}

Elezović, N. R., Babić, B. M., Gajić Krstajić, L., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2010). Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction. in Journal of Power Sources
Elsevier., 195(13), 3961-3968.
https://doi.org/10.1016/j.jpowsour.2010.01.035
https://hdl.handle.net/21.15107/rcub_dais_3418

Elezović NR, Babić BM, Gajić Krstajić L, Radmilović VR, Krstajić N, Vračar L. Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction. in Journal of Power Sources. 2010;195(13):3961-3968.
doi:10.1016/j.jpowsour.2010.01.035
https://hdl.handle.net/21.15107/rcub_dais_3418 .

Elezović, Nevenka R., Babić, Biljana M., Gajić Krstajić, Ljiljana, Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction" in Journal of Power Sources, 195, no. 13 (2010):3961-3968,
https://doi.org/10.1016/j.jpowsour.2010.01.035 .,
https://hdl.handle.net/21.15107/rcub_dais_3418 .

TY  - JOUR
AU  - Elezović, Nevenka
AU  - Gajić Krstajić, Ljiljana
AU  - Vračar, Ljiljana
AU  - Krstajić, Nedeljko
PY  - 2010
UR  - https://dais.sanu.ac.rs/123456789/3410
AB  - The influence of poisoning of MoOx-Pt catalyst by CO on the kinetics of H2 oxidation reaction (HOR) at MoOx-Pt electrode in 0.5 mol dm-3 HClO4 saturated with H 2 containing 100 ppm CO, was examined on rotating disc electrode (RDE) at 25 °C. MoOx-Pt nano-catalyst prepared by the polyole method combined with MoOx post-deposition was supported on commercial carbon black, Vulcan XC-72. The MoOx-Pt/C catalyst was characterized by TEM technique. The catalyst composition is very similar to the nominal one and post-deposited MoOx species block only a small fraction of the active Pt particle surface area. MoOx deposition on the carbon support can be ruled out from the EDAX results and from the low mobility of these oxides under used conditions. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations from a dual-pathway model were derived to describe oxidation current-potential behavior on RDE over entire potential range, at various CO coverages. The polarization RDE curves were fitted with derived polarization equations according to the proposed model. The fitting showed that the HOR proceeded most likely via the Tafel-Volmer (TV) pathway. A very high electrocatalytic activity observed at MoOx-Pt catalyst for the hydrogen oxidation reaction in the presence of 100 ppm CO is achieved through chemical surface reaction of adsorbed CO with Mo surface oxides. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T2  - International Journal of Hydrogen Energy
T1  - Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction
SP  - 12878
EP  - 12887
VL  - 35
IS  - 23
DO  - 10.1016/j.ijhydene.2010.09.004
UR  - https://hdl.handle.net/21.15107/rcub_dais_3410
ER  - 

@article{
author = "Elezović, Nevenka and Gajić Krstajić, Ljiljana and Vračar, Ljiljana and Krstajić, Nedeljko",
year = "2010",
abstract = "The influence of poisoning of MoOx-Pt catalyst by CO on the kinetics of H2 oxidation reaction (HOR) at MoOx-Pt electrode in 0.5 mol dm-3 HClO4 saturated with H 2 containing 100 ppm CO, was examined on rotating disc electrode (RDE) at 25 °C. MoOx-Pt nano-catalyst prepared by the polyole method combined with MoOx post-deposition was supported on commercial carbon black, Vulcan XC-72. The MoOx-Pt/C catalyst was characterized by TEM technique. The catalyst composition is very similar to the nominal one and post-deposited MoOx species block only a small fraction of the active Pt particle surface area. MoOx deposition on the carbon support can be ruled out from the EDAX results and from the low mobility of these oxides under used conditions. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations from a dual-pathway model were derived to describe oxidation current-potential behavior on RDE over entire potential range, at various CO coverages. The polarization RDE curves were fitted with derived polarization equations according to the proposed model. The fitting showed that the HOR proceeded most likely via the Tafel-Volmer (TV) pathway. A very high electrocatalytic activity observed at MoOx-Pt catalyst for the hydrogen oxidation reaction in the presence of 100 ppm CO is achieved through chemical surface reaction of adsorbed CO with Mo surface oxides. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy, International Journal of Hydrogen Energy",
title = "Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction",
pages = "12878-12887",
volume = "35",
number = "23",
doi = "10.1016/j.ijhydene.2010.09.004",
url = "https://hdl.handle.net/21.15107/rcub_dais_3410"
}

Elezović, N., Gajić Krstajić, L., Vračar, L.,& Krstajić, N.. (2010). Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction. in International Journal of Hydrogen Energy
Elsevier., 35(23), 12878-12887.
https://doi.org/10.1016/j.ijhydene.2010.09.004
https://hdl.handle.net/21.15107/rcub_dais_3410

Elezović N, Gajić Krstajić L, Vračar L, Krstajić N. Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction. in International Journal of Hydrogen Energy. 2010;35(23):12878-12887.
doi:10.1016/j.ijhydene.2010.09.004
https://hdl.handle.net/21.15107/rcub_dais_3410 .

Elezović, Nevenka, Gajić Krstajić, Ljiljana, Vračar, Ljiljana, Krstajić, Nedeljko, "Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction" in International Journal of Hydrogen Energy, 35, no. 23 (2010):12878-12887,
https://doi.org/10.1016/j.ijhydene.2010.09.004 .,
https://hdl.handle.net/21.15107/rcub_dais_3410 .

TY  - CONF
AU  - Krstajić, Nedeljko
AU  - Elezović, Nevenka
AU  - Vračar, Ljiljana
AU  - Gajić Krstajić, Ljiljana
AU  - Radmilović, Velimir R.
PY  - 2009
UR  - https://dais.sanu.ac.rs/123456789/266
AB  - Poster presented at the 11th Conference of the Materials Research Society of Serbia - YUCOMAT 2009, Herceg Novi, Montenegro, August 31 – September 4, 2009.
T1  - Kinetics of the Hydrogen Oxidation on Pt Modified Moox Nano-Sized Catalyst in the Presence of Carbon Monoxide
UR  - https://hdl.handle.net/21.15107/rcub_dais_266
ER  - 

@conference{
author = "Krstajić, Nedeljko and Elezović, Nevenka and Vračar, Ljiljana and Gajić Krstajić, Ljiljana and Radmilović, Velimir R.",
year = "2009",
abstract = "Poster presented at the 11th Conference of the Materials Research Society of Serbia - YUCOMAT 2009, Herceg Novi, Montenegro, August 31 – September 4, 2009.",
title = "Kinetics of the Hydrogen Oxidation on Pt Modified Moox Nano-Sized Catalyst in the Presence of Carbon Monoxide",
url = "https://hdl.handle.net/21.15107/rcub_dais_266"
}

Krstajić, N., Elezović, N., Vračar, L., Gajić Krstajić, L.,& Radmilović, V. R.. (2009). Kinetics of the Hydrogen Oxidation on Pt Modified Moox Nano-Sized Catalyst in the Presence of Carbon Monoxide. .
https://hdl.handle.net/21.15107/rcub_dais_266

Krstajić N, Elezović N, Vračar L, Gajić Krstajić L, Radmilović VR. Kinetics of the Hydrogen Oxidation on Pt Modified Moox Nano-Sized Catalyst in the Presence of Carbon Monoxide. 2009;.
https://hdl.handle.net/21.15107/rcub_dais_266 .

Krstajić, Nedeljko, Elezović, Nevenka, Vračar, Ljiljana, Gajić Krstajić, Ljiljana, Radmilović, Velimir R., "Kinetics of the Hydrogen Oxidation on Pt Modified Moox Nano-Sized Catalyst in the Presence of Carbon Monoxide" (2009),
https://hdl.handle.net/21.15107/rcub_dais_266 .