HYDROGEN EVOLUTION REACTION ON NI-S ELECTRODES IN ALKALINE-SOLUTIONS

被引：45

作者：

GONZALEZ, ER

AVACA, LA

TREMILIOSI-FILHO, G

MACHADO, SAS

FERREIRA, M

机构：

[1] Instituto de Fisica e Química de São Carlos, USP, CEP 13560-970 São Carlos, SP

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 1994年 / 19卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/0360-3199(94)90173-2

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 mechanism on electrodeposited Ni-S coatings of low sulphur content was initially studied in alkaline solutions through steady-state polarization measurements. Tafel plots were analysed at several temperatures and varying pH. The results suggested a mechanism involving fast electron transfer followed by a slow electrochemical desorption step. This Volmer Heyrovsky mechanism was fully confirmed by impedance spectroscopy measurements through the fit of the results with those derived theoretically for the different mechanisms. The values of the corresponding rate constants were obtained for temperatures ranging from 0 to 60-degrees-C.

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页码：17 / 21

页数：5

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