The kinetics and mechanism of hydrogen evolution at Ti-Ni alloy electrodes prepared by are-melting and mechanical alloying methods has been studied by means of AC impedance spectrum measurements. The electrode, prepared by mechanical alloying (porous electrode), after activation in a 10% HF solution, is very active despite its large Tafel slope. The SEM studies show a formation of deep pores on the electrode surface. The rate constants of the forward and backward reactions of the corresponding steps were estimated by a nonlinear fitting method. It has been found that the overall reaction proceeds through a Volmer-Heyrovsky mechanism.
Keywords:
metal hydrides / hydrogen absorption mechanism / kinetics / impedance
Source:
Journal of Alloys and Compounds, 1997, 257, 1-2, 245-252
TY - JOUR
AU - Krstajić, Nedeljko V.
AU - Grgur, Branimir
AU - Zdujić, Miodrag
AU - Vojnović, MV
AU - Jaksić, MM
PY - 1997
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/138
AB - The kinetics and mechanism of hydrogen evolution at Ti-Ni alloy electrodes prepared by are-melting and mechanical alloying methods has been studied by means of AC impedance spectrum measurements. The electrode, prepared by mechanical alloying (porous electrode), after activation in a 10% HF solution, is very active despite its large Tafel slope. The SEM studies show a formation of deep pores on the electrode surface. The rate constants of the forward and backward reactions of the corresponding steps were estimated by a nonlinear fitting method. It has been found that the overall reaction proceeds through a Volmer-Heyrovsky mechanism.
PB - Elsevier Science Sa, Lausanne
T2 - Journal of Alloys and Compounds
T1 - Kinetic properties of the Ti-Ni intermetallic phases and alloys for hydrogen evolution
EP - 252
IS - 1-2
SP - 245
VL - 257
DO - 10.1016/S0925-8388(97)00018-2
ER -
@article{
author = "Krstajić, Nedeljko V. and Grgur, Branimir and Zdujić, Miodrag and Vojnović, MV and Jaksić, MM",
year = "1997",
abstract = "The kinetics and mechanism of hydrogen evolution at Ti-Ni alloy electrodes prepared by are-melting and mechanical alloying methods has been studied by means of AC impedance spectrum measurements. The electrode, prepared by mechanical alloying (porous electrode), after activation in a 10% HF solution, is very active despite its large Tafel slope. The SEM studies show a formation of deep pores on the electrode surface. The rate constants of the forward and backward reactions of the corresponding steps were estimated by a nonlinear fitting method. It has been found that the overall reaction proceeds through a Volmer-Heyrovsky mechanism.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Kinetic properties of the Ti-Ni intermetallic phases and alloys for hydrogen evolution",
pages = "252-245",
number = "1-2",
volume = "257",
doi = "10.1016/S0925-8388(97)00018-2"
}
Krstajić, N. V., Grgur, B., Zdujić, M., Vojnović, M.,& Jaksić, M.. (1997). Kinetic properties of the Ti-Ni intermetallic phases and alloys for hydrogen evolution. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 257(1-2), 245-252.
https://doi.org/10.1016/S0925-8388(97)00018-2
Krstajić NV, Grgur B, Zdujić M, Vojnović M, Jaksić M. Kinetic properties of the Ti-Ni intermetallic phases and alloys for hydrogen evolution. in Journal of Alloys and Compounds. 1997;257(1-2):245-252.
doi:10.1016/S0925-8388(97)00018-2 .
Krstajić, Nedeljko V., Grgur, Branimir, Zdujić, Miodrag, Vojnović, MV, Jaksić, MM, "Kinetic properties of the Ti-Ni intermetallic phases and alloys for hydrogen evolution" in Journal of Alloys and Compounds, 257, no. 1-2 (1997):245-252,
https://doi.org/10.1016/S0925-8388(97)00018-2 . .
