Kinetic analysis of hydrogen evolution at Ni-Mo alloy electrodes

被引：274

作者：

Jaksic, JM

Vojnovic, MV

Krstajic, NV

机构：

[1] Univ Belgrade, Fac Agr, YU-11000 Belgrade, Yugoslavia

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

来源：

ELECTROCHIMICA ACTA | 2000年 / 45卷 / 25-26期

关键词：

hydrogen evolution reation; mehanism Mo-Ni alloys; ac impedance;

D O I：

10.1016/S0013-4686(00)00549-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The hydrogen evolution reaction (HER) on Ni, Mo and MoNi intermetallic compound was investigated with ac impedance and de polarization measurements in 1.0 mol dm(-3) NaOH solution at 25 degrees C. The rate constants of the forward and backward reactions of Volmer, Heyrovsky and Tafel steps were estimated by a nonlinear fitting method. MoNi alloy electrode provides a much lower overpotential for the HER than Ni and Mo electrodes, sometimes which exhibit similar catalytic activity. The main pathway for the HER at above mentioned electrode materials is Volmer-Heyrovsky with Heyrovsky as the rate determining step. (C) 2000 Elsevier Science Ltd. All rights reserved.

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页码：4151 / 4158

页数：8

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