THE MECHANISM OF HYDROGEN EVOLUTION REACTION ON A MODIFIED RANEY-NICKEL COMPOSITE-COATED ELECTRODE BY AC IMPEDANCE

被引：61

作者：

OKIDO, M ^{[1
]}

DEPO, JK ^{[1
]}

CAPUANO, GA ^{[1
]}

机构：

[1] UNIV QUEBEC,DEPT CHIM,MONTREAL H3C 3P8,QUEBEC,CANADA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1993年 / 140卷 / 01期

关键词：

D O I：

10.1149/1.2056073

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 a modified Raney nickel electrode, consisting of Ni-Al-Cu-Cr alloy, was investigated with ac impedence measurements and by dc polarization current behavior in 5.36M KOH solution at 70-degrees-C. Comparative measurements also were carried out on commercial Raney nickel (Ni-Al). The rate constants of the forward and backward reactions of Volmer, Heyrovsky, and Tafel steps were estimated by a nonlinear fitting method. The modified Raney nickel composite-coated electrode provides a lower overpotential for the HER than the commercial Raney nickel-coated electrode. The main pathway for the HER is Volmer-Tafel with Volmer as the rate determining step.

引用

页码：127 / 133

页数：7

共 34 条

[1] IMPEDANCE PLANE DISPLAY OF A REACTION WITH AN ADSORBED INTERMEDIATE [J].