Radmilović, Velimir R.

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  • Radmilović, Velimir R. (30)
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Author's Bibliography

Fascinating world of nanosciences and nanotechnologies

Radmilović, Velimir R.; DeHosson, Jeff Th. M.

(Belgrade : SASA, 2020)

TY  - CONF
AU  - Radmilović, Velimir R.
AU  - DeHosson, Jeff Th. M.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/9253
PB  - Belgrade : SASA
C3  - Fascinating world of nanoscience and nanotechnology
T1  - Fascinating world of nanosciences and nanotechnologies
T1  - Фасцинантни свет нанонаукa и нанотехнологијa
SP  - 7
EP  - 14
UR  - https://hdl.handle.net/21.15107/rcub_dais_9253
ER  - 
@conference{
author = "Radmilović, Velimir R. and DeHosson, Jeff Th. M.",
year = "2020",
publisher = "Belgrade : SASA",
journal = "Fascinating world of nanoscience and nanotechnology",
title = "Fascinating world of nanosciences and nanotechnologies, Фасцинантни свет нанонаукa и нанотехнологијa",
pages = "7-14",
url = "https://hdl.handle.net/21.15107/rcub_dais_9253"
}
Radmilović, V. R.,& DeHosson, J. Th. M.. (2020). Fascinating world of nanosciences and nanotechnologies. in Fascinating world of nanoscience and nanotechnology
Belgrade : SASA., 7-14.
https://hdl.handle.net/21.15107/rcub_dais_9253
Radmilović VR, DeHosson JTM. Fascinating world of nanosciences and nanotechnologies. in Fascinating world of nanoscience and nanotechnology. 2020;:7-14.
https://hdl.handle.net/21.15107/rcub_dais_9253 .
Radmilović, Velimir R., DeHosson, Jeff Th. M., "Fascinating world of nanosciences and nanotechnologies" in Fascinating world of nanoscience and nanotechnology (2020):7-14,
https://hdl.handle.net/21.15107/rcub_dais_9253 .

Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag

Nikolić, Irena; Marković, Smilja; Veselinović, Ljiljana; Radmilović, Vuk V.; Janković Častvan, Ivona; Radmilović, Velimir R.

(Elsevier, 2019)

TY  - JOUR
AU  - Nikolić, Irena
AU  - Marković, Smilja
AU  - Veselinović, Ljiljana
AU  - Radmilović, Vuk V.
AU  - Janković Častvan, Ivona
AU  - Radmilović, Velimir R.
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0167577X18315908
UR  - http://dais.sanu.ac.rs/123456789/4551
AB  - Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali activation of EAFS enhances the Cu2+ adsorption. The adsorption process was found to follow a pseudo second-order kinetic model and occurs via formation of posnjakite (Cu4(SO4)(OH)6·H2O) on the surface of both, EAFS and AAS. Enhanced adsorption properties of AAS, compared to EAFS, are attributed to a more porous structure, larger specific surface area and an increased number of surface groups involved in the binding of Cu2+.
PB  - Elsevier
T2  - Materials Letters
T1  - Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag
SP  - 184
EP  - 188
VL  - 235
DO  - 10.1016/j.matlet.2018.10.027
UR  - https://hdl.handle.net/21.15107/rcub_dais_4551
ER  - 
@article{
author = "Nikolić, Irena and Marković, Smilja and Veselinović, Ljiljana and Radmilović, Vuk V. and Janković Častvan, Ivona and Radmilović, Velimir R.",
year = "2019",
abstract = "Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali activation of EAFS enhances the Cu2+ adsorption. The adsorption process was found to follow a pseudo second-order kinetic model and occurs via formation of posnjakite (Cu4(SO4)(OH)6·H2O) on the surface of both, EAFS and AAS. Enhanced adsorption properties of AAS, compared to EAFS, are attributed to a more porous structure, larger specific surface area and an increased number of surface groups involved in the binding of Cu2+.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag",
pages = "184-188",
volume = "235",
doi = "10.1016/j.matlet.2018.10.027",
url = "https://hdl.handle.net/21.15107/rcub_dais_4551"
}
Nikolić, I., Marković, S., Veselinović, L., Radmilović, V. V., Janković Častvan, I.,& Radmilović, V. R.. (2019). Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag. in Materials Letters
Elsevier., 235, 184-188.
https://doi.org/10.1016/j.matlet.2018.10.027
https://hdl.handle.net/21.15107/rcub_dais_4551
Nikolić I, Marković S, Veselinović L, Radmilović VV, Janković Častvan I, Radmilović VR. Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag. in Materials Letters. 2019;235:184-188.
doi:10.1016/j.matlet.2018.10.027
https://hdl.handle.net/21.15107/rcub_dais_4551 .
Nikolić, Irena, Marković, Smilja, Veselinović, Ljiljana, Radmilović, Vuk V., Janković Častvan, Ivona, Radmilović, Velimir R., "Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag" in Materials Letters, 235 (2019):184-188,
https://doi.org/10.1016/j.matlet.2018.10.027 .,
https://hdl.handle.net/21.15107/rcub_dais_4551 .
1
1
2

Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag

Nikolić, Irena; Marković, Smilja; Veselinović, Ljiljana; Radmilović, Vuk V.; Janković Častvan, Ivona; Radmilović, Velimir R.

(Elsevier, 2019)

TY  - JOUR
AU  - Nikolić, Irena
AU  - Marković, Smilja
AU  - Veselinović, Ljiljana
AU  - Radmilović, Vuk V.
AU  - Janković Častvan, Ivona
AU  - Radmilović, Velimir R.
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0167577X18315908
UR  - http://dais.sanu.ac.rs/123456789/4603
AB  - Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali activation of EAFS enhances the Cu2+ adsorption. The adsorption process was found to follow a pseudo second-order kinetic model and occurs via formation of posnjakite (Cu4(SO4)(OH)6·H2O) on the surface of both, EAFS and AAS. Enhanced adsorption properties of AAS, compared to EAFS, are attributed to a more porous structure, larger specific surface area and an increased number of surface groups involved in the binding of Cu2+.
PB  - Elsevier
T2  - Materials Letters
T1  - Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag
SP  - 184
EP  - 188
VL  - 235
DO  - 10.1016/j.matlet.2018.10.027
UR  - https://hdl.handle.net/21.15107/rcub_dais_4603
ER  - 
@article{
author = "Nikolić, Irena and Marković, Smilja and Veselinović, Ljiljana and Radmilović, Vuk V. and Janković Častvan, Ivona and Radmilović, Velimir R.",
year = "2019",
abstract = "Pristine electric arc furnace slag (EAFS) as well as EAFS modified by alkali activation i.e. alkali activated slag (AAS) have found a novel application as adsorbents used in Cu2+ removal from sulfate solutions. The adsorption tests were carried in batch conditions and results have shown that alkali activation of EAFS enhances the Cu2+ adsorption. The adsorption process was found to follow a pseudo second-order kinetic model and occurs via formation of posnjakite (Cu4(SO4)(OH)6·H2O) on the surface of both, EAFS and AAS. Enhanced adsorption properties of AAS, compared to EAFS, are attributed to a more porous structure, larger specific surface area and an increased number of surface groups involved in the binding of Cu2+.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag",
pages = "184-188",
volume = "235",
doi = "10.1016/j.matlet.2018.10.027",
url = "https://hdl.handle.net/21.15107/rcub_dais_4603"
}
Nikolić, I., Marković, S., Veselinović, L., Radmilović, V. V., Janković Častvan, I.,& Radmilović, V. R.. (2019). Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag. in Materials Letters
Elsevier., 235, 184-188.
https://doi.org/10.1016/j.matlet.2018.10.027
https://hdl.handle.net/21.15107/rcub_dais_4603
Nikolić I, Marković S, Veselinović L, Radmilović VV, Janković Častvan I, Radmilović VR. Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag. in Materials Letters. 2019;235:184-188.
doi:10.1016/j.matlet.2018.10.027
https://hdl.handle.net/21.15107/rcub_dais_4603 .
Nikolić, Irena, Marković, Smilja, Veselinović, Ljiljana, Radmilović, Vuk V., Janković Častvan, Ivona, Radmilović, Velimir R., "Enhanced sorption of Cu2+ from sulfate solutions onto modified electric arc furnace slag" in Materials Letters, 235 (2019):184-188,
https://doi.org/10.1016/j.matlet.2018.10.027 .,
https://hdl.handle.net/21.15107/rcub_dais_4603 .
1
1
2

A novel type of building material derived from the by-products of steel making industry

Nikolić, Irena; Milašević, Ivana; Cupara, Nevena; Ivanović, Ljubica; Đurović, Dijana; Marković, Smilja; Veselinović, Ljiljana; Radmilović, Vuk V.; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2019)

TY  - CONF
AU  - Nikolić, Irena
AU  - Milašević, Ivana
AU  - Cupara, Nevena
AU  - Ivanović, Ljubica
AU  - Đurović, Dijana
AU  - Marković, Smilja
AU  - Veselinović, Ljiljana
AU  - Radmilović, Vuk V.
AU  - Radmilović, Velimir R.
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6678
AB  - Electric arc furnace slag (EAFS) and electric arc furnace dust (EAFD) are the waste materials generated during the iron and steel scrap remelting in electric arc furnace. EAFS is non-hazardous material which has found its application in different field of civil engineering. On the other hand, EAFD is classified as hazardous matreials due to the presence of heavy metals (Zn, Pb, Cu Cr and Cd) and their potential leaching into environment. Stabilization/solidification (S/S) of toxic waste is a widely investigated as simply method for production of stable product. Cement binder was mainly used for this purpose but important shift in the use of different waste materials as a cement replacement was observed. The aim of this study was to investigate the possibility of S/S of heavy metals from EAFD using the alkali activated binders based on EAFS. The alkali activated slag with a different content of EAFS was synthesised and characterized using the SEM/EDS, XRDP, FTIR. The binding of Zn into the reaction product of slag alkali activation was founded. The immobilization efficacy was evaluated using TCLP Method No. 1311 (USEPA) and EN 12457-2 (EULFD) leaching tests.
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  - A novel type of building material derived from the by-products of steel making industry
SP  - 84
VL  - 84
UR  - https://hdl.handle.net/21.15107/rcub_dais_6678
ER  - 
@conference{
author = "Nikolić, Irena and Milašević, Ivana and Cupara, Nevena and Ivanović, Ljubica and Đurović, Dijana and Marković, Smilja and Veselinović, Ljiljana and Radmilović, Vuk V. and Radmilović, Velimir R.",
year = "2019",
abstract = "Electric arc furnace slag (EAFS) and electric arc furnace dust (EAFD) are the waste materials generated during the iron and steel scrap remelting in electric arc furnace. EAFS is non-hazardous material which has found its application in different field of civil engineering. On the other hand, EAFD is classified as hazardous matreials due to the presence of heavy metals (Zn, Pb, Cu Cr and Cd) and their potential leaching into environment. Stabilization/solidification (S/S) of toxic waste is a widely investigated as simply method for production of stable product. Cement binder was mainly used for this purpose but important shift in the use of different waste materials as a cement replacement was observed. The aim of this study was to investigate the possibility of S/S of heavy metals from EAFD using the alkali activated binders based on EAFS. The alkali activated slag with a different content of EAFS was synthesised and characterized using the SEM/EDS, XRDP, FTIR. The binding of Zn into the reaction product of slag alkali activation was founded. The immobilization efficacy was evaluated using TCLP Method No. 1311 (USEPA) and EN 12457-2 (EULFD) leaching tests.",
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 = "A novel type of building material derived from the by-products of steel making industry",
pages = "84",
volume = "84",
url = "https://hdl.handle.net/21.15107/rcub_dais_6678"
}
Nikolić, I., Milašević, I., Cupara, N., Ivanović, L., Đurović, D., Marković, S., Veselinović, L., Radmilović, V. V.,& Radmilović, V. R.. (2019). A novel type of building material derived from the by-products of steel making industry. 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., 84, 84.
https://hdl.handle.net/21.15107/rcub_dais_6678
Nikolić I, Milašević I, Cupara N, Ivanović L, Đurović D, Marković S, Veselinović L, Radmilović VV, Radmilović VR. A novel type of building material derived from the by-products of steel making industry. 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;84:84.
https://hdl.handle.net/21.15107/rcub_dais_6678 .
Nikolić, Irena, Milašević, Ivana, Cupara, Nevena, Ivanović, Ljubica, Đurović, Dijana, Marković, Smilja, Veselinović, Ljiljana, Radmilović, Vuk V., Radmilović, Velimir R., "A novel type of building material derived from the by-products of steel making industry" 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, 84 (2019):84,
https://hdl.handle.net/21.15107/rcub_dais_6678 .

Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters

Nikolić, Irena; Đurović, Dijana; Milašević, Ivana; Marković, Smilja; Veselinović, Ljiljana; Radmilović, Vuk V.; Janković Častvan, Ivona; Radmilović, Velimir R.

(Belgrade : Serbian Academy of Sciences and Arts, 2018)

TY  - CONF
AU  - Nikolić, Irena
AU  - Đurović, Dijana
AU  - Milašević, Ivana
AU  - Marković, Smilja
AU  - Veselinović, Ljiljana
AU  - Radmilović, Vuk V.
AU  - Janković Častvan, Ivona
AU  - Radmilović, Velimir R.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/3629
AB  - The removal of heavy metals from wastewaters is presently a global imperative primarily due to their well-known toxic nature and detrimental effects on the environment, and more importantly, on human health. Currently, special attention is paid to the use of novel slag based materials – alkali activated slag (AAS) as potential novel adsorbents. Our previous studies have shown that electric arc furnace slag (EAFS) can be successfully used as a precursor for the production of AAS. Generally, alkaline activation involves a chemical reaction between solid aluminosilicate materials and a highly alkaline activator. The alkali activation mechanism of slag involves the dissolution of slag in a highly alkaline, which is followed by the condensation and hardening processes. Dependent on the pH and type of alkaline activator, calcium (alumina) silicate hydrate or C–(A)–S–H gel has been identified as a reaction product of slag alkali activation. The objective of this research was to investigate the removal of Cu2+ from aquatic solution using alkali activated slag (AAS) obtained by alkaline activation of EAFS.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters
SP  - 198
EP  - 200
UR  - https://hdl.handle.net/21.15107/rcub_dais_3629
ER  - 
@conference{
author = "Nikolić, Irena and Đurović, Dijana and Milašević, Ivana and Marković, Smilja and Veselinović, Ljiljana and Radmilović, Vuk V. and Janković Častvan, Ivona and Radmilović, Velimir R.",
year = "2018",
abstract = "The removal of heavy metals from wastewaters is presently a global imperative primarily due to their well-known toxic nature and detrimental effects on the environment, and more importantly, on human health. Currently, special attention is paid to the use of novel slag based materials – alkali activated slag (AAS) as potential novel adsorbents. Our previous studies have shown that electric arc furnace slag (EAFS) can be successfully used as a precursor for the production of AAS. Generally, alkaline activation involves a chemical reaction between solid aluminosilicate materials and a highly alkaline activator. The alkali activation mechanism of slag involves the dissolution of slag in a highly alkaline, which is followed by the condensation and hardening processes. Dependent on the pH and type of alkaline activator, calcium (alumina) silicate hydrate or C–(A)–S–H gel has been identified as a reaction product of slag alkali activation. The objective of this research was to investigate the removal of Cu2+ from aquatic solution using alkali activated slag (AAS) obtained by alkaline activation of EAFS.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters",
pages = "198-200",
url = "https://hdl.handle.net/21.15107/rcub_dais_3629"
}
Nikolić, I., Đurović, D., Milašević, I., Marković, S., Veselinović, L., Radmilović, V. V., Janković Častvan, I.,& Radmilović, V. R.. (2018). Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 198-200.
https://hdl.handle.net/21.15107/rcub_dais_3629
Nikolić I, Đurović D, Milašević I, Marković S, Veselinović L, Radmilović VV, Janković Častvan I, Radmilović VR. Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:198-200.
https://hdl.handle.net/21.15107/rcub_dais_3629 .
Nikolić, Irena, Đurović, Dijana, Milašević, Ivana, Marković, Smilja, Veselinović, Ljiljana, Radmilović, Vuk V., Janković Častvan, Ivona, Radmilović, Velimir R., "Alkali Activated Slag as Adsorbents for Cu2+ Removal from Wastewaters" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):198-200,
https://hdl.handle.net/21.15107/rcub_dais_3629 .

New multifunctional materials based on steel slag

Milašević, Ivana; Ivanović, Ljubica; Nikolić, Irena; Đurović, Dijana; Marković, Smilja; Radmilović, Vuk V.; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2018)

TY  - CONF
AU  - Milašević, Ivana
AU  - Ivanović, Ljubica
AU  - Nikolić, Irena
AU  - Đurović, Dijana
AU  - Marković, Smilja
AU  - Radmilović, Vuk V.
AU  - Radmilović, Velimir R.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/3665
AB  - Electric arc furnace slag (EAFS) is the by-product of steel production in an electric arc furnace. In a pass two decade a special attention is paid to the valorization of metallurgical slags by alkali activation. The process involves a chemical reaction of slag with the alkaline activator followed by the condensation and hardening processes. Aluminium-containing calcium silicate hydrate gel i.e. C–(A)–S–H gel with a low C/S ratio has been identified as a reaction product of slag alkali activation. We have synthesized the AAS using the EAFS as the precursor and Na2SiO3 solution as an activator. The AAS samples are characterized by XRD, SEM/EDS and FTIR analysis. Moreover, investigation of mechanical properties dilatometric and porosity analysis were performed as well so as to build up a detailed illustration of AAS properties and possible application of these materials. The results have shown that AAS may reach the compressive strength (~ 40 MPa) which enables its application in a civil engineering. Moreover, the AAS sample exhibits improved strength (~ 50 MPa) at elevated temperatures thus potential application of these materials in a high temperature conditions should be considered. On the other hand, these materials may be used as an effective adsorbent for the Cu2+ removal from sulfate bearing wastewater. The Cu2 + ions have been found to be attached on the surface of AAS by formation of stable hydrooxocomplexes that are sorbed on the adsorbent surface via hydroxyl groups in the form of posnjakite crystal phase.
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  - New multifunctional materials based on steel slag
SP  - 123
EP  - 123
UR  - https://hdl.handle.net/21.15107/rcub_dais_3665
ER  - 
@conference{
author = "Milašević, Ivana and Ivanović, Ljubica and Nikolić, Irena and Đurović, Dijana and Marković, Smilja and Radmilović, Vuk V. and Radmilović, Velimir R.",
year = "2018",
abstract = "Electric arc furnace slag (EAFS) is the by-product of steel production in an electric arc furnace. In a pass two decade a special attention is paid to the valorization of metallurgical slags by alkali activation. The process involves a chemical reaction of slag with the alkaline activator followed by the condensation and hardening processes. Aluminium-containing calcium silicate hydrate gel i.e. C–(A)–S–H gel with a low C/S ratio has been identified as a reaction product of slag alkali activation. We have synthesized the AAS using the EAFS as the precursor and Na2SiO3 solution as an activator. The AAS samples are characterized by XRD, SEM/EDS and FTIR analysis. Moreover, investigation of mechanical properties dilatometric and porosity analysis were performed as well so as to build up a detailed illustration of AAS properties and possible application of these materials. The results have shown that AAS may reach the compressive strength (~ 40 MPa) which enables its application in a civil engineering. Moreover, the AAS sample exhibits improved strength (~ 50 MPa) at elevated temperatures thus potential application of these materials in a high temperature conditions should be considered. On the other hand, these materials may be used as an effective adsorbent for the Cu2+ removal from sulfate bearing wastewater. The Cu2 + ions have been found to be attached on the surface of AAS by formation of stable hydrooxocomplexes that are sorbed on the adsorbent surface via hydroxyl groups in the form of posnjakite crystal phase.",
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 = "New multifunctional materials based on steel slag",
pages = "123-123",
url = "https://hdl.handle.net/21.15107/rcub_dais_3665"
}
Milašević, I., Ivanović, L., Nikolić, I., Đurović, D., Marković, S., Radmilović, V. V.,& Radmilović, V. R.. (2018). New multifunctional materials based on steel slag. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
Belgrade : Materials Research Society of Serbia., 123-123.
https://hdl.handle.net/21.15107/rcub_dais_3665
Milašević I, Ivanović L, Nikolić I, Đurović D, Marković S, Radmilović VV, Radmilović VR. New multifunctional materials based on steel slag. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018. 2018;:123-123.
https://hdl.handle.net/21.15107/rcub_dais_3665 .
Milašević, Ivana, Ivanović, Ljubica, Nikolić, Irena, Đurović, Dijana, Marković, Smilja, Radmilović, Vuk V., Radmilović, Velimir R., "New multifunctional materials based on steel slag" in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018 (2018):123-123,
https://hdl.handle.net/21.15107/rcub_dais_3665 .

Comparative study on noble metal based nanocatalysts on different supports for low temperature fuel cells application

Gajić Krstajić, Ljiljana; Radmilović, Velimir R.; Ercius, Peter; Jović, Borka; Jović, Vladimir; Zabinski, Piotr; Elezović, Nevenka

(Belgrade : Materials Research Society of Serbia, 2018)

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  - http://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 .

The slag based adsorbents for Cu2+ removal from aquatic solutions

Nikolić, Irena; Đurović, Dijana; Milašević, Ivana; Marković, Smilja; Radmilović, Vuk V.; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2017)

TY  - CONF
AU  - Nikolić, Irena
AU  - Đurović, Dijana
AU  - Milašević, Ivana
AU  - Marković, Smilja
AU  - Radmilović, Vuk V.
AU  - Radmilović, Velimir R.
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/15443
AB  - This study aims to understand the kinetic, thermodynamic and mechanism of Cu2+ adsorption onto unmodified electric arc furnace slag (EAFS) and alkali modified EAFS. The adsorption process was investigated via a batch reactor system. The modified EAFS sample has been prepared by reacting an EAFS powder with an aqueous alkali silicate solution. The both samples were characterized by SEM, XRD, FTIR and porosimetric measurements. The results have shown that alkali activation of EAFS favour adsorption process. The adsorption reaction on both adsorbents was found to be pseudo second order. Thermodynamic investigations have shown that adsorption process is spontaneous and endothermic. Mechanism of adsorption was investigated using the intraparticle diffusion and Boyd model which suggested that the both, film diffusion and diffusion within the pores of adsorbent controls the intraparticle diffusion of Cu2+ onto and EAFS and modified EAFS and was mainly due to external mass transport. Besides, FTIR spectroscopy determined the surface functional groups of the EAFS and modified EAFS which participate in Cu2+ bonding.
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  - The slag based adsorbents for Cu2+ removal from aquatic solutions
SP  - 58
EP  - 58
UR  - https://hdl.handle.net/21.15107/rcub_dais_15443
ER  - 
@conference{
author = "Nikolić, Irena and Đurović, Dijana and Milašević, Ivana and Marković, Smilja and Radmilović, Vuk V. and Radmilović, Velimir R.",
year = "2017",
abstract = "This study aims to understand the kinetic, thermodynamic and mechanism of Cu2+ adsorption onto unmodified electric arc furnace slag (EAFS) and alkali modified EAFS. The adsorption process was investigated via a batch reactor system. The modified EAFS sample has been prepared by reacting an EAFS powder with an aqueous alkali silicate solution. The both samples were characterized by SEM, XRD, FTIR and porosimetric measurements. The results have shown that alkali activation of EAFS favour adsorption process. The adsorption reaction on both adsorbents was found to be pseudo second order. Thermodynamic investigations have shown that adsorption process is spontaneous and endothermic. Mechanism of adsorption was investigated using the intraparticle diffusion and Boyd model which suggested that the both, film diffusion and diffusion within the pores of adsorbent controls the intraparticle diffusion of Cu2+ onto and EAFS and modified EAFS and was mainly due to external mass transport. Besides, FTIR spectroscopy determined the surface functional groups of the EAFS and modified EAFS which participate in Cu2+ bonding.",
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 = "The slag based adsorbents for Cu2+ removal from aquatic solutions",
pages = "58-58",
url = "https://hdl.handle.net/21.15107/rcub_dais_15443"
}
Nikolić, I., Đurović, D., Milašević, I., Marković, S., Radmilović, V. V.,& Radmilović, V. R.. (2017). The slag based adsorbents for Cu2+ removal from aquatic solutions. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 58-58.
https://hdl.handle.net/21.15107/rcub_dais_15443
Nikolić I, Đurović D, Milašević I, Marković S, Radmilović VV, Radmilović VR. The slag based adsorbents for Cu2+ removal from aquatic solutions. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:58-58.
https://hdl.handle.net/21.15107/rcub_dais_15443 .
Nikolić, Irena, Đurović, Dijana, Milašević, Ivana, Marković, Smilja, Radmilović, Vuk V., Radmilović, Velimir R., "The slag based adsorbents for Cu2+ removal from aquatic solutions" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):58-58,
https://hdl.handle.net/21.15107/rcub_dais_15443 .

Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017

Uskoković, Dragan; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2017)

TY  - CONF
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/15421
AB  - The First Conference on materials science and engineering, including physics, physical chemistry, condensed matter chemistry, and technology in general, was held in September 1995, in Herceg Novi. An initiative to establish Yugoslav Materials Research Society was born at the conference and, similar to other MR societies in the world, the programme was made and objectives determined. The Yugoslav Materials Research Society (Yu-MRS), a nongovernment and non-profit scientific association, was founded in 1997 to promote multidisciplinary goal-oriented research in materials science and engineering. The main task and objective of the Society has been to encourage creativity in materials research and engineering to reach a harmonic coordination between achievements in this field in our country and analogous activities in the world with an aim to include our country into global international projects.

Until 2003, Conferences were held every second year and then they grew into Annual Conferences that were traditionally held in Herceg Novi in September of every year. In 2007 Yu-MRS formed two new MRS: MRS-Serbia (official successor of Yu-MRS) and MRS-Montenegro (in founding). In 2008, MRS – Serbia became a member of FEMS (Federation of European Materials Societies).
PB  - Belgrade : Materials Research Society of Serbia
T1  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
UR  - https://hdl.handle.net/21.15107/rcub_dais_15421
ER  - 
@conference{
editor = "Uskoković, Dragan, Radmilović, Velimir R.",
year = "2017",
abstract = "The First Conference on materials science and engineering, including physics, physical chemistry, condensed matter chemistry, and technology in general, was held in September 1995, in Herceg Novi. An initiative to establish Yugoslav Materials Research Society was born at the conference and, similar to other MR societies in the world, the programme was made and objectives determined. The Yugoslav Materials Research Society (Yu-MRS), a nongovernment and non-profit scientific association, was founded in 1997 to promote multidisciplinary goal-oriented research in materials science and engineering. The main task and objective of the Society has been to encourage creativity in materials research and engineering to reach a harmonic coordination between achievements in this field in our country and analogous activities in the world with an aim to include our country into global international projects.

Until 2003, Conferences were held every second year and then they grew into Annual Conferences that were traditionally held in Herceg Novi in September of every year. In 2007 Yu-MRS formed two new MRS: MRS-Serbia (official successor of Yu-MRS) and MRS-Montenegro (in founding). In 2008, MRS – Serbia became a member of FEMS (Federation of European Materials Societies).",
publisher = "Belgrade : Materials Research Society of Serbia",
title = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
url = "https://hdl.handle.net/21.15107/rcub_dais_15421"
}
Uskoković, D.,& Radmilović, V. R.. (2017). Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 
Belgrade : Materials Research Society of Serbia..
https://hdl.handle.net/21.15107/rcub_dais_15421
Uskoković D, Radmilović VR. Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;.
https://hdl.handle.net/21.15107/rcub_dais_15421 .
Uskoković, Dragan, Radmilović, Velimir R., "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017" (2017),
https://hdl.handle.net/21.15107/rcub_dais_15421 .

Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag

Nikolić, Irena; Marković, Smilja; Janković Častvan, Ivona; Radmilović, Vuk V.; Karanović, Ljiljana; Babić, Biljana M.; Radmilović, Velimir R.

(Elsevier, 2016)

TY  - JOUR
AU  - Nikolić, Irena
AU  - Marković, Smilja
AU  - Janković Častvan, Ivona
AU  - Radmilović, Vuk V.
AU  - Karanović, Ljiljana
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/15992
AB  - Geopolymeric binders (GB) were produced using fly ash (FA) and electric arc furnace slag (EAFS). The slag has been added in the range of 0–40%. The effects of slag content on the strength, microstructure and thermal resistance were evaluated. It was found that the amount of EAFS up to 30% positively affects the strength evolution of GB. The main reaction product of FA/EAFS blends was amorphous N–(C)–A–S–H gel along with geopolymer-type gel (N–A–S–H). Thermal resistance of GB was considered from the standpoint of their mechanical and dimensional stability after heating in the temperature interval of 600–800 °C. The changes in mechanical and thermal properties of GB after heating are attributed to the changes in their structure. The results have shown that EAFS negatively affects the thermal resistance of GB above 600 °C due to the phase transition and morphological transformation of the amorphous gel phase.
PB  - Elsevier
T2  - Materials Letters
T1  - Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag
SP  - 301
EP  - 305
VL  - 176
DO  - 10.1016/j.matlet.2016.04.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_15992
ER  - 
@article{
author = "Nikolić, Irena and Marković, Smilja and Janković Častvan, Ivona and Radmilović, Vuk V. and Karanović, Ljiljana and Babić, Biljana M. and Radmilović, Velimir R.",
year = "2016",
abstract = "Geopolymeric binders (GB) were produced using fly ash (FA) and electric arc furnace slag (EAFS). The slag has been added in the range of 0–40%. The effects of slag content on the strength, microstructure and thermal resistance were evaluated. It was found that the amount of EAFS up to 30% positively affects the strength evolution of GB. The main reaction product of FA/EAFS blends was amorphous N–(C)–A–S–H gel along with geopolymer-type gel (N–A–S–H). Thermal resistance of GB was considered from the standpoint of their mechanical and dimensional stability after heating in the temperature interval of 600–800 °C. The changes in mechanical and thermal properties of GB after heating are attributed to the changes in their structure. The results have shown that EAFS negatively affects the thermal resistance of GB above 600 °C due to the phase transition and morphological transformation of the amorphous gel phase.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag",
pages = "301-305",
volume = "176",
doi = "10.1016/j.matlet.2016.04.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_15992"
}
Nikolić, I., Marković, S., Janković Častvan, I., Radmilović, V. V., Karanović, L., Babić, B. M.,& Radmilović, V. R.. (2016). Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag. in Materials Letters
Elsevier., 176, 301-305.
https://doi.org/10.1016/j.matlet.2016.04.121
https://hdl.handle.net/21.15107/rcub_dais_15992
Nikolić I, Marković S, Janković Častvan I, Radmilović VV, Karanović L, Babić BM, Radmilović VR. Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag. in Materials Letters. 2016;176:301-305.
doi:10.1016/j.matlet.2016.04.121
https://hdl.handle.net/21.15107/rcub_dais_15992 .
Nikolić, Irena, Marković, Smilja, Janković Častvan, Ivona, Radmilović, Vuk V., Karanović, Ljiljana, Babić, Biljana M., Radmilović, Velimir R., "Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag" in Materials Letters, 176 (2016):301-305,
https://doi.org/10.1016/j.matlet.2016.04.121 .,
https://hdl.handle.net/21.15107/rcub_dais_15992 .
26
25
28

Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag

Nikolić, Irena; Marković, Smilja; Janković Častvan, Ivona; Radmilović, Vuk V.; Karanović, Ljiljana; Babić, Biljana M.; Radmilović, Velimir R.

(Elsevier, 2016)

TY  - JOUR
AU  - Nikolić, Irena
AU  - Marković, Smilja
AU  - Janković Častvan, Ivona
AU  - Radmilović, Vuk V.
AU  - Karanović, Ljiljana
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/4639
AB  - Geopolymeric binders (GB) were produced using fly ash (FA) and electric arc furnace slag (EAFS). The slag has been added in the range of 0–40%. The effects of slag content on the strength, microstructure and thermal resistance were evaluated. It was found that the amount of EAFS up to 30% positively affects the strength evolution of GB. The main reaction product of FA/EAFS blends was amorphous N–(C)–A–S–H gel along with geopolymer-type gel (N–A–S–H). Thermal resistance of GB was considered from the standpoint of their mechanical and dimensional stability after heating in the temperature interval of 600–800 °C. The changes in mechanical and thermal properties of GB after heating are attributed to the changes in their structure. The results have shown that EAFS negatively affects the thermal resistance of GB above 600 °C due to the phase transition and morphological transformation of the amorphous gel phase.
PB  - Elsevier
T2  - Materials Letters
T1  - Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag
SP  - 301
EP  - 305
VL  - 176
DO  - 10.1016/j.matlet.2016.04.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_4639
ER  - 
@article{
author = "Nikolić, Irena and Marković, Smilja and Janković Častvan, Ivona and Radmilović, Vuk V. and Karanović, Ljiljana and Babić, Biljana M. and Radmilović, Velimir R.",
year = "2016",
abstract = "Geopolymeric binders (GB) were produced using fly ash (FA) and electric arc furnace slag (EAFS). The slag has been added in the range of 0–40%. The effects of slag content on the strength, microstructure and thermal resistance were evaluated. It was found that the amount of EAFS up to 30% positively affects the strength evolution of GB. The main reaction product of FA/EAFS blends was amorphous N–(C)–A–S–H gel along with geopolymer-type gel (N–A–S–H). Thermal resistance of GB was considered from the standpoint of their mechanical and dimensional stability after heating in the temperature interval of 600–800 °C. The changes in mechanical and thermal properties of GB after heating are attributed to the changes in their structure. The results have shown that EAFS negatively affects the thermal resistance of GB above 600 °C due to the phase transition and morphological transformation of the amorphous gel phase.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag",
pages = "301-305",
volume = "176",
doi = "10.1016/j.matlet.2016.04.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_4639"
}
Nikolić, I., Marković, S., Janković Častvan, I., Radmilović, V. V., Karanović, L., Babić, B. M.,& Radmilović, V. R.. (2016). Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag. in Materials Letters
Elsevier., 176, 301-305.
https://doi.org/10.1016/j.matlet.2016.04.121
https://hdl.handle.net/21.15107/rcub_dais_4639
Nikolić I, Marković S, Janković Častvan I, Radmilović VV, Karanović L, Babić BM, Radmilović VR. Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag. in Materials Letters. 2016;176:301-305.
doi:10.1016/j.matlet.2016.04.121
https://hdl.handle.net/21.15107/rcub_dais_4639 .
Nikolić, Irena, Marković, Smilja, Janković Častvan, Ivona, Radmilović, Vuk V., Karanović, Ljiljana, Babić, Biljana M., Radmilović, Velimir R., "Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag" in Materials Letters, 176 (2016):301-305,
https://doi.org/10.1016/j.matlet.2016.04.121 .,
https://hdl.handle.net/21.15107/rcub_dais_4639 .
26
25
28

Synthesis and characterization of Pd nanocatalyst at tungsten carbide based support for fuel cells application

Gajić Krstajić, Ljiljana; Zabinski, Piotr; Radmilović, Velimir R.; Ercius, Peter; Krstajić Pajić, Mila; Lačnjevac, Uroš; Krstajić, Nedeljko; Elezović, Nevenka

(Belgrade : Materials Research Society of Serbia, 2016)

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  - http://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 .

Pt nanoparticles on tin oxide based support as a beneficial catalyst for oxygen reduction in alkaline solutions

Elezović, Nevenka; Radmilović, Velimir R.; Kovač, Janez; Babić, Biljana M.; Gajić Krstajić, Ljiljana; Krstajić, Nedeljko

(2015)

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  - http://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 .
1
20
21
21

Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag

Nikolić, Irena; Marković, Smilja; Karanović, Ljiljana; Radmilović, Vuk V.; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2015)

TY  - CONF
AU  - Nikolić, Irena
AU  - Marković, Smilja
AU  - Karanović, Ljiljana
AU  - Radmilović, Vuk V.
AU  - Radmilović, Velimir R.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/829
AB  - The thermal resistance of alkali-activated binders based on fly ash (FA), electric arc furnace slag (EAFS) and their FA/EAFS blends was assessed. Compressive strengths of samples before and after firing were measured. The samples were characterized by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), energydispersive X-ray spectra (EDS), thermal (TG/DTA) analysis. Besides, the sintering shrinkage were recorded by thermomechanical analyzer (TMA) during non-isothermal sintering up to 900 ºC with heating rate of 15 º/min, in an air atmosphere. The main reaction products in FA and EAFS based alkali activated binders are the sodiumalumino-silicate-hydrate (N–A–S–H) and calcium-alumino-silicate-hydrate (C-A-S-H) type gels, respectively. FA/EAFS based binders are characterized by the presence of N-A-S-H gel with the high content of Ca. The EAFS based binders exhibited superior performances in terms of compressive strength than FA based binders. Thermal resistance of FA based binders was improved by the slag addition. This research was supported by a Ministry of Science of Montenegro under the contract No. 01-460.
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  - Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag
SP  - 24
EP  - 24
UR  - https://hdl.handle.net/21.15107/rcub_dais_829
ER  - 
@conference{
author = "Nikolić, Irena and Marković, Smilja and Karanović, Ljiljana and Radmilović, Vuk V. and Radmilović, Velimir R.",
year = "2015",
abstract = "The thermal resistance of alkali-activated binders based on fly ash (FA), electric arc furnace slag (EAFS) and their FA/EAFS blends was assessed. Compressive strengths of samples before and after firing were measured. The samples were characterized by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), energydispersive X-ray spectra (EDS), thermal (TG/DTA) analysis. Besides, the sintering shrinkage were recorded by thermomechanical analyzer (TMA) during non-isothermal sintering up to 900 ºC with heating rate of 15 º/min, in an air atmosphere. The main reaction products in FA and EAFS based alkali activated binders are the sodiumalumino-silicate-hydrate (N–A–S–H) and calcium-alumino-silicate-hydrate (C-A-S-H) type gels, respectively. FA/EAFS based binders are characterized by the presence of N-A-S-H gel with the high content of Ca. The EAFS based binders exhibited superior performances in terms of compressive strength than FA based binders. Thermal resistance of FA based binders was improved by the slag addition. This research was supported by a Ministry of Science of Montenegro under the contract No. 01-460.",
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 = "Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag",
pages = "24-24",
url = "https://hdl.handle.net/21.15107/rcub_dais_829"
}
Nikolić, I., Marković, S., Karanović, L., Radmilović, V. V.,& Radmilović, V. R.. (2015). Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag. 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., 24-24.
https://hdl.handle.net/21.15107/rcub_dais_829
Nikolić I, Marković S, Karanović L, Radmilović VV, Radmilović VR. Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015. 2015;:24-24.
https://hdl.handle.net/21.15107/rcub_dais_829 .
Nikolić, Irena, Marković, Smilja, Karanović, Ljiljana, Radmilović, Vuk V., Radmilović, Velimir R., "Thermal Resistance of Alkali Activated Binders Synthesized Using the Fly Ash and Steel Slag" in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015 (2015):24-24,
https://hdl.handle.net/21.15107/rcub_dais_829 .

Platinum Nanocatalysts at Titanium Oxide Based Supports for Low Temperature Fuel Cell Applications

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Radmilović, Velimir R.; Krstajić, Nedeljko

(Belgrade : Materials Research Society of Serbia, 2015)

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
PY  - 2015
UR  - http://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 .

Electrochemical oxygen reduction at platinum catalyst on tin oxide based support in alkaline solution

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Kovač, Janez; Radmilović, Velimir R.; Krstajić, Nedeljko

(Belgrade : Materials Research Society of Serbia, 2014)

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  - http://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 .

Geopolymer materials based on the electric arc furnace slag

Nikolić, Irena; Janković Častvan, Ivona; Radmilović, Vuk V.; Karanović, Ljiljana; Marković, Smilja; Mentus, Slavko; Radmilović, Velimir R.

(Belgrade : Materials Research Society of Serbia, 2013)

TY  - CONF
AU  - Nikolić, Irena
AU  - Janković Častvan, Ivona
AU  - Radmilović, Vuk V.
AU  - Karanović, Ljiljana
AU  - Marković, Smilja
AU  - Mentus, Slavko
AU  - Radmilović, Velimir R.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/401
AB  - The remelting of iron and steel scrap in the electric arc furnaces generates the non-hazardous waste – electric arc furnace slag (EAFS), which can be disposed of to appropriate landfills. Currently, this slag found its application in conventional concrete production to improve its mechanical, chemical and physical properties, as an additive to asphalt base mixture and in cement production. In this study we have investigated the effect of alkaline dosage on the strength and thermal resistance of EAFS based geopolymers. The results have shown that these materials are mainly amorphous with some crystal phases remained from the undisolved EAFS such as larnite, gehlenite, wuestite, monticellite, calcite. Compressive strength of these materials is strongly influenced by the alkaline dosage. An increase of NaOH concentration in the interval of 7-10 M leads to the increase of geopolymer’s strength. The maximal compressive strength of EAFS based geopolymer was obtained using the 10 M NaOH. Further increase of alkaline dosage to the value of 13 M NaOH results in the slight decrease of the geopolymer strength. Additionally, depending on the synthesis parameters, EAFS based geopolymers exhibit improved durability in high temperature environments in comparison with conventional cement based materials. All investigated samples exhibit a shrinkage which is attributed to the change of porosity. The mass loss due to the loss of water was also observed. This research was supported by a Ministry of Science of Montenegro under the contract No 01-460.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Geopolymer materials based on the electric arc furnace slag
SP  - 47
EP  - 47
UR  - https://hdl.handle.net/21.15107/rcub_dais_401
ER  - 
@conference{
author = "Nikolić, Irena and Janković Častvan, Ivona and Radmilović, Vuk V. and Karanović, Ljiljana and Marković, Smilja and Mentus, Slavko and Radmilović, Velimir R.",
year = "2013",
abstract = "The remelting of iron and steel scrap in the electric arc furnaces generates the non-hazardous waste – electric arc furnace slag (EAFS), which can be disposed of to appropriate landfills. Currently, this slag found its application in conventional concrete production to improve its mechanical, chemical and physical properties, as an additive to asphalt base mixture and in cement production. In this study we have investigated the effect of alkaline dosage on the strength and thermal resistance of EAFS based geopolymers. The results have shown that these materials are mainly amorphous with some crystal phases remained from the undisolved EAFS such as larnite, gehlenite, wuestite, monticellite, calcite. Compressive strength of these materials is strongly influenced by the alkaline dosage. An increase of NaOH concentration in the interval of 7-10 M leads to the increase of geopolymer’s strength. The maximal compressive strength of EAFS based geopolymer was obtained using the 10 M NaOH. Further increase of alkaline dosage to the value of 13 M NaOH results in the slight decrease of the geopolymer strength. Additionally, depending on the synthesis parameters, EAFS based geopolymers exhibit improved durability in high temperature environments in comparison with conventional cement based materials. All investigated samples exhibit a shrinkage which is attributed to the change of porosity. The mass loss due to the loss of water was also observed. This research was supported by a Ministry of Science of Montenegro under the contract No 01-460.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Geopolymer materials based on the electric arc furnace slag",
pages = "47-47",
url = "https://hdl.handle.net/21.15107/rcub_dais_401"
}
Nikolić, I., Janković Častvan, I., Radmilović, V. V., Karanović, L., Marković, S., Mentus, S.,& Radmilović, V. R.. (2013). Geopolymer materials based on the electric arc furnace slag. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 47-47.
https://hdl.handle.net/21.15107/rcub_dais_401
Nikolić I, Janković Častvan I, Radmilović VV, Karanović L, Marković S, Mentus S, Radmilović VR. Geopolymer materials based on the electric arc furnace slag. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:47-47.
https://hdl.handle.net/21.15107/rcub_dais_401 .
Nikolić, Irena, Janković Častvan, Ivona, Radmilović, Vuk V., Karanović, Ljiljana, Marković, Smilja, Mentus, Slavko, Radmilović, Velimir R., "Geopolymer materials based on the electric arc furnace slag" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):47-47,
https://hdl.handle.net/21.15107/rcub_dais_401 .

Preparation and characterization Pt CATALYST on Ru doped tin oxide support for oxygen reduction

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Radmilović, Velimir R.; Krstajić, Nedeljko

(Belgrade : Materials Research Society of Serbia, 2013)

TY  - CONF
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
PY  - 2013
UR  - http://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 .

Pt supported on nano-tungsten carbide as a beneficial catalyst for the oxygen reduction reaction in alkaline solution

Elezović, Nevenka; Babić, Biljana M.; Gajić Krstajić, Ljiljana; Ercius, Peter; Radmilović, Velimir R.; Krstajić, Nedeljko; Vračar, Ljiljana

(Elsevier, 2012)

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  - http://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 .
47
46
48

Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Radmilović, Velimir R.; Krstajić, Nedeljko; Vračar, Ljiljana

(Belgrade : Materials Research Society of Serbia, 2012)

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  - http://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 .

Preparation and Characterization of Pt Nanocatalyst on Tungsten Based Support for Alkaline Fuel Cells Applications

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Ercius, Peter; Radmilović, Velimir R.; Krstajić, Nedeljko; Vračar, Ljiljana

(2011)

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  - http://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 .

Preparation and characterization of pt nanocatalyst on tungsten based support for alkaline fuel cells applications

Gajić Krstajić, Ljiljana; Elezović, Nevenka; Babić, Biljana M.; Radmilović, Velimir R.; Krstajić, Nedeljko; Vračar, Ljubomir

(Belgrade : Materials Research Society of Serbia, 2011)

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  - http://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 .

A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction

Elezović, Nevenka; Babić, Biljana M.; Radmilović, Velimir R.; Gajić Krstajić, Ljiljana; Krstajić, Nedeljko; Vračar, Ljiljana

(Belgrade : Serbian Chemical Society, 2011)

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  - http://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 .
3
2
2

Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol

Stojanović, D.; Orlović, A.; Glišić, S. B.; Marković, Smilja; Radmilović, Velimir R.; Uskoković, Petar S.; Aleksić, Radoslav

(Elsevier, 2010)

TY  - JOUR
AU  - Stojanović, D.
AU  - Orlović, A.
AU  - Glišić, S. B.
AU  - Marković, Smilja
AU  - Radmilović, Velimir R.
AU  - Uskoković, Petar S.
AU  - Aleksić, Radoslav
PY  - 2010
UR  - http://dais.sanu.ac.rs/123456789/3427
AB  - The objective of this study is to investigate and compare methods of nanosilica coating with γ-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d50 value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 °C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation. © 2010 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Supercritical Fluids
T1  - Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol
SP  - 276
EP  - 284
VL  - 52
IS  - 3
DO  - 10.1016/j.supflu.2010.02.004
UR  - https://hdl.handle.net/21.15107/rcub_dais_3427
ER  - 
@article{
author = "Stojanović, D. and Orlović, A. and Glišić, S. B. and Marković, Smilja and Radmilović, Velimir R. and Uskoković, Petar S. and Aleksić, Radoslav",
year = "2010",
abstract = "The objective of this study is to investigate and compare methods of nanosilica coating with γ-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d50 value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 °C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation. © 2010 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Supercritical Fluids",
title = "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol",
pages = "276-284",
volume = "52",
number = "3",
doi = "10.1016/j.supflu.2010.02.004",
url = "https://hdl.handle.net/21.15107/rcub_dais_3427"
}
Stojanović, D., Orlović, A., Glišić, S. B., Marković, S., Radmilović, V. R., Uskoković, P. S.,& Aleksić, R.. (2010). Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids
Elsevier., 52(3), 276-284.
https://doi.org/10.1016/j.supflu.2010.02.004
https://hdl.handle.net/21.15107/rcub_dais_3427
Stojanović D, Orlović A, Glišić SB, Marković S, Radmilović VR, Uskoković PS, Aleksić R. Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids. 2010;52(3):276-284.
doi:10.1016/j.supflu.2010.02.004
https://hdl.handle.net/21.15107/rcub_dais_3427 .
Stojanović, D., Orlović, A., Glišić, S. B., Marković, Smilja, Radmilović, Velimir R., Uskoković, Petar S., Aleksić, Radoslav, "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol" in Journal of Supercritical Fluids, 52, no. 3 (2010):276-284,
https://doi.org/10.1016/j.supflu.2010.02.004 .,
https://hdl.handle.net/21.15107/rcub_dais_3427 .
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Synthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction

Elezović, Nevenka R.; Babić, Biljana M.; Gajić Krstajić, Ljiljana; Radmilović, Velimir R.; Krstajić, Nedeljko; Vračar, Ljiljana

(Elsevier, 2010)

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  - http://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 .
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