Cathodic behaviour of RuO2-doped Ni/Co3O4 electrodes in alkaline solutions:: hydrogen evolution

被引：68

作者：

Krstajic, N ^{[1
]}

Trasatti, S ^{[1
]}

机构：

[1] Univ Milan, Dept Phys Chem & Electrochem, I-20133 Milan, Italy

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 1998年 / 28卷 / 12期

关键词：

electrocatalysis; hydrogen evolution; mixed oxide electrodes; Co3O4; RuO2; reaction mechanism;

D O I：

10.1023/A:1003444110172

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

RuO2-doped Co3O4 electrodes were prepared by thermal decomposition of the corresponding nitrates using Ni as a support. The RuO2 content was varied between 0 and 20 mol %. The kinetics of hydrogen evolution from alkaline solution was studied by recording quasisteady state polarization curves at several NaOH concentrations. A mechanism is proposed on the basis of Tafel slopes and reaction orders. The electrocatalytic activity of the mixed oxides has been found to go through a maximum at intermediate RuO2 contents. Some evidence of instability has emerged.

引用

页码：1291 / 1297

页数：7

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