The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance
Abstract
The kinetics and mechanism of hydrogen evolution at Ti-Ni alloys electrode has been studied by means of steady-state potentiostatic polarization and ac impedance spectrum measurements. Complex-plane spectrum plots are derived for the h.e.r. at one of the most inactive, typical hydridic, Ti-Ni, and one of the most active, typical electrocatalytic, Ti-Ni-3, intermetallic alloy compounds at various potentials. 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 coupled Volmer-Heyrovsky mechanism. The electrocatalytic activity decreases in the order TiNi2 gt TiNi3 gt TiNi4 gt Ti2Ni gt TiNi gt Ti3Ni gt TiNi0.7.
Keywords:
TiNi alloys / hydrogen evolution / electrocatalytic activity / kinetic parameters / ac impedanceSource:
Electrochimica Acta, 1997, 42, 2, 323-330Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
DOI: 10.1016/0013-4686(96)00188-0
ISSN: 0013-4686
WoS: A1997VT64100020
Scopus: 2-s2.0-0030857758
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Krstajić, Nedeljko V. AU - Grgur, Branimir AU - Mladenović, NS AU - Vojnović, MV AU - Jaksić, MM PY - 1997 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/120 AB - The kinetics and mechanism of hydrogen evolution at Ti-Ni alloys electrode has been studied by means of steady-state potentiostatic polarization and ac impedance spectrum measurements. Complex-plane spectrum plots are derived for the h.e.r. at one of the most inactive, typical hydridic, Ti-Ni, and one of the most active, typical electrocatalytic, Ti-Ni-3, intermetallic alloy compounds at various potentials. 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 coupled Volmer-Heyrovsky mechanism. The electrocatalytic activity decreases in the order TiNi2 gt TiNi3 gt TiNi4 gt Ti2Ni gt TiNi gt Ti3Ni gt TiNi0.7. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance EP - 330 IS - 2 SP - 323 VL - 42 DO - 10.1016/0013-4686(96)00188-0 ER -
@article{ author = "Krstajić, Nedeljko V. and Grgur, Branimir and Mladenović, NS and Vojnović, MV and Jaksić, MM", year = "1997", abstract = "The kinetics and mechanism of hydrogen evolution at Ti-Ni alloys electrode has been studied by means of steady-state potentiostatic polarization and ac impedance spectrum measurements. Complex-plane spectrum plots are derived for the h.e.r. at one of the most inactive, typical hydridic, Ti-Ni, and one of the most active, typical electrocatalytic, Ti-Ni-3, intermetallic alloy compounds at various potentials. 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 coupled Volmer-Heyrovsky mechanism. The electrocatalytic activity decreases in the order TiNi2 gt TiNi3 gt TiNi4 gt Ti2Ni gt TiNi gt Ti3Ni gt TiNi0.7.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance", pages = "330-323", number = "2", volume = "42", doi = "10.1016/0013-4686(96)00188-0" }
Krstajić, N. V., Grgur, B., Mladenović, N., Vojnović, M.,& Jaksić, M.. (1997). The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 42(2), 323-330. https://doi.org/10.1016/0013-4686(96)00188-0
Krstajić NV, Grgur B, Mladenović N, Vojnović M, Jaksić M. The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance. in Electrochimica Acta. 1997;42(2):323-330. doi:10.1016/0013-4686(96)00188-0 .
Krstajić, Nedeljko V., Grgur, Branimir, Mladenović, NS, Vojnović, MV, Jaksić, MM, "The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance" in Electrochimica Acta, 42, no. 2 (1997):323-330, https://doi.org/10.1016/0013-4686(96)00188-0 . .