The determination of kinetics parameters of the hydrogen evolution on Pd-Ni alloys by ac impedance

被引：26

作者：

Krstajic, NV

Burojevic, S

Vracar, LM

机构：

[1] Univ Belgrade, Fac Technol & Met, YU-11000 Belgrade, Yugoslavia

[2] Univ Belgrade, Fac Chem, YU-11000 Belgrade, Yugoslavia

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2000年 / 25卷 / 07期

关键词：

D O I：

10.1016/S0360-3199(99)00075-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrogen evolution reaction (HER) at a Pd-Ni electrodeposited alloy electrode has been studied by means of ac impedance spectrum measurements and by de polarization current behavior in 0.5 mol dm(-3) NaOH solution at 25 degrees C, 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, with Heyrovsky as the rate determining step. The coverage vs potential relation is discussed comparing the results of ac impedance calculations with the same of potential decay determinations. (C) 2000 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.

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页码：635 / 641

页数：7

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