TY  - CONF
AU  - Vasić, Milica M.
AU  - Milikić, Jadranka
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/14864
AB  - Water electrolysis represents a simple and clean method for production of hydrogen and oxygen. Nickel is a promising electrode material for large-scale application. Its activity could be improved by alloying it with other metals, non-metals or rare earth elements, or by fabrication in the form of foams or nanostructured composites, grafting onto a high surface area support, etc.
In this study, Ni2+ cation-exchanged zeolites NiA and NiX were tested as electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) in alkaline media (1 M KOH). Conventional ion-exchange procedure was used to prepare Ni2+ cation-exchanged forms of NaA and NaX zeolites. The obtained materials, NiA and NiX, are described by formula Ni6(AlO2)12(SiO2)12 and Na23Ni32(AlO2)87(SiO2)105, respectively.
XRD analysis generally confirmed the crystalline structure of the studied materials. In the case of NiA, broadening of diffraction peaks at 2θ angle of 11, 24 and 35o indicated partial distortion of the zeolite crystal lattice during ion-exchange process.
Electrocatalitic activity of NiA and NiX for HER and OER was studied in 1 M KOH by recording polarization curves, chronoamperograms and electrochemical impedance spectra. For both reactions, NiA exhibited better catalytic activity than NiX, including higher current density and lower Tafel slope values. This could be correlated with higher Ni weight fraction in NiA than in NiX, and with higher electrical conductivity of NiA. Analysis of the electrochemical impedance spectra revealed that the HER is controlled by adsorption of the Hads intermediate, while the OER is controlled by the charge transfer at the potentials of interest for the process. Relatively good stability of both materials during HER and OER was deduced from the chronoamperometric curves.
PB  - Belgrade : Faculty of physical chemistry
C3  - Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade
T1  - NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media
SP  - 36
EP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_dais_14864
ER  - 

@conference{
author = "Vasić, Milica M. and Milikić, Jadranka and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "Water electrolysis represents a simple and clean method for production of hydrogen and oxygen. Nickel is a promising electrode material for large-scale application. Its activity could be improved by alloying it with other metals, non-metals or rare earth elements, or by fabrication in the form of foams or nanostructured composites, grafting onto a high surface area support, etc.
In this study, Ni2+ cation-exchanged zeolites NiA and NiX were tested as electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) in alkaline media (1 M KOH). Conventional ion-exchange procedure was used to prepare Ni2+ cation-exchanged forms of NaA and NaX zeolites. The obtained materials, NiA and NiX, are described by formula Ni6(AlO2)12(SiO2)12 and Na23Ni32(AlO2)87(SiO2)105, respectively.
XRD analysis generally confirmed the crystalline structure of the studied materials. In the case of NiA, broadening of diffraction peaks at 2θ angle of 11, 24 and 35o indicated partial distortion of the zeolite crystal lattice during ion-exchange process.
Electrocatalitic activity of NiA and NiX for HER and OER was studied in 1 M KOH by recording polarization curves, chronoamperograms and electrochemical impedance spectra. For both reactions, NiA exhibited better catalytic activity than NiX, including higher current density and lower Tafel slope values. This could be correlated with higher Ni weight fraction in NiA than in NiX, and with higher electrical conductivity of NiA. Analysis of the electrochemical impedance spectra revealed that the HER is controlled by adsorption of the Hads intermediate, while the OER is controlled by the charge transfer at the potentials of interest for the process. Relatively good stability of both materials during HER and OER was deduced from the chronoamperometric curves.",
publisher = "Belgrade : Faculty of physical chemistry",
journal = "Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade",
title = "NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media",
pages = "36-36",
url = "https://hdl.handle.net/21.15107/rcub_dais_14864"
}

Vasić, M. M., Milikić, J., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade
Belgrade : Faculty of physical chemistry., 36-36.
https://hdl.handle.net/21.15107/rcub_dais_14864

Vasić MM, Milikić J, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade. 2018;:36-36.
https://hdl.handle.net/21.15107/rcub_dais_14864 .

Vasić, Milica M., Milikić, Jadranka, Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media" in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade (2018):36-36,
https://hdl.handle.net/21.15107/rcub_dais_14864 .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Vasić, Milica M.
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4588
AB  - NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media
SP  - 18977
EP  - 18991
VL  - 43
IS  - 41
DO  - 10.1016/j.ijhydene.2018.08.063
UR  - https://hdl.handle.net/21.15107/rcub_dais_4588
ER  - 

@article{
author = "Milikić, Jadranka and Vasić, Milica M. and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media",
pages = "18977-18991",
volume = "43",
number = "41",
doi = "10.1016/j.ijhydene.2018.08.063",
url = "https://hdl.handle.net/21.15107/rcub_dais_4588"
}

Milikić, J., Vasić, M. M., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy
Elsevier., 43(41), 18977-18991.
https://doi.org/10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4588

Milikić J, Vasić MM, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy. 2018;43(41):18977-18991.
doi:10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4588 .

Milikić, Jadranka, Vasić, Milica M., Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media" in International Journal of Hydrogen Energy, 43, no. 41 (2018):18977-18991,
https://doi.org/10.1016/j.ijhydene.2018.08.063 .,
https://hdl.handle.net/21.15107/rcub_dais_4588 .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Vasić, Milica M.
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4077
AB  - NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media
SP  - 18977
EP  - 18991
VL  - 43
IS  - 41
DO  - 10.1016/j.ijhydene.2018.08.063
UR  - https://hdl.handle.net/21.15107/rcub_dais_4077
ER  - 

@article{
author = "Milikić, Jadranka and Vasić, Milica M. and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media",
pages = "18977-18991",
volume = "43",
number = "41",
doi = "10.1016/j.ijhydene.2018.08.063",
url = "https://hdl.handle.net/21.15107/rcub_dais_4077"
}

Milikić, J., Vasić, M. M., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy
Elsevier., 43(41), 18977-18991.
https://doi.org/10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4077

Milikić J, Vasić MM, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy. 2018;43(41):18977-18991.
doi:10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4077 .

Milikić, Jadranka, Vasić, Milica M., Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media" in International Journal of Hydrogen Energy, 43, no. 41 (2018):18977-18991,
https://doi.org/10.1016/j.ijhydene.2018.08.063 .,
https://hdl.handle.net/21.15107/rcub_dais_4077 .

TY  - JOUR
AU  - Čebela, Maria
AU  - Janković, Bojan
AU  - Hercigonja, Radmila
AU  - Lukić, Miodrag J.
AU  - Dohčević-Mitrović, Zorana
AU  - Milivojević, Dušan
AU  - Matović, Branko
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15964
AB  - In this paper, bismuth ferrite (BFO) particles synthesized by controlled hydrothermal process, where the particles of small sizes and with high purity were obtained. Structural analysis showed that non-annealed powder can be perfectly fitted to rhombohedral space group R3c and contains a very small amount of secondary phase, whereas the final product (annealed at 800 °C) represents single-phase perovskite powder with high crystallinity. HRTEM analysis confirmed existence of twin stacking faults, which are responsible for enhanced magnetic properties. EPR measurements suggested existence of electrons trapped by vacancies or defects. It has been proposed that existence of Fe3+ −OV defect complex could be generated at elevated temperatures followed by formation of trivalent Fe ions, which intensely provide local 3d moments.
PB  - Novi Sad Faculty of Technology, University of Novi Sad
T2  - Processing and Application of Ceramics
T1  - Comprehensive characterization of BiFeO3 powder synthesized by the hydrothermal procedure
SP  - 201
EP  - 208
VL  - 10
IS  - 4
DO  - 10.2298/PAC1604201C
UR  - https://hdl.handle.net/21.15107/rcub_dais_15964
ER  - 

@article{
author = "Čebela, Maria and Janković, Bojan and Hercigonja, Radmila and Lukić, Miodrag J. and Dohčević-Mitrović, Zorana and Milivojević, Dušan and Matović, Branko",
year = "2016",
abstract = "In this paper, bismuth ferrite (BFO) particles synthesized by controlled hydrothermal process, where the particles of small sizes and with high purity were obtained. Structural analysis showed that non-annealed powder can be perfectly fitted to rhombohedral space group R3c and contains a very small amount of secondary phase, whereas the final product (annealed at 800 °C) represents single-phase perovskite powder with high crystallinity. HRTEM analysis confirmed existence of twin stacking faults, which are responsible for enhanced magnetic properties. EPR measurements suggested existence of electrons trapped by vacancies or defects. It has been proposed that existence of Fe3+ −OV defect complex could be generated at elevated temperatures followed by formation of trivalent Fe ions, which intensely provide local 3d moments.",
publisher = "Novi Sad Faculty of Technology, University of Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Comprehensive characterization of BiFeO3 powder synthesized by the hydrothermal procedure",
pages = "201-208",
volume = "10",
number = "4",
doi = "10.2298/PAC1604201C",
url = "https://hdl.handle.net/21.15107/rcub_dais_15964"
}

Čebela, M., Janković, B., Hercigonja, R., Lukić, M. J., Dohčević-Mitrović, Z., Milivojević, D.,& Matović, B.. (2016). Comprehensive characterization of BiFeO3 powder synthesized by the hydrothermal procedure. in Processing and Application of Ceramics
Novi Sad Faculty of Technology, University of Novi Sad., 10(4), 201-208.
https://doi.org/10.2298/PAC1604201C
https://hdl.handle.net/21.15107/rcub_dais_15964

Čebela M, Janković B, Hercigonja R, Lukić MJ, Dohčević-Mitrović Z, Milivojević D, Matović B. Comprehensive characterization of BiFeO3 powder synthesized by the hydrothermal procedure. in Processing and Application of Ceramics. 2016;10(4):201-208.
doi:10.2298/PAC1604201C
https://hdl.handle.net/21.15107/rcub_dais_15964 .

Čebela, Maria, Janković, Bojan, Hercigonja, Radmila, Lukić, Miodrag J., Dohčević-Mitrović, Zorana, Milivojević, Dušan, Matović, Branko, "Comprehensive characterization of BiFeO3 powder synthesized by the hydrothermal procedure" in Processing and Application of Ceramics, 10, no. 4 (2016):201-208,
https://doi.org/10.2298/PAC1604201C .,
https://hdl.handle.net/21.15107/rcub_dais_15964 .