Electrocatalytic activity of ruthenium for oxygen reduction in alkaline solution

被引：87

作者：

Prakash, J ^{[1
]}

Joachin, H ^{[1
]}

机构：

[1] IIT, Dept Environm Chem & Engn, Ctr Electrochem Sci & Engn, Chicago, IL 60616 USA

来源：

ELECTROCHIMICA ACTA | 2000年 / 45卷 / 14期

关键词：

ruthenium; oxygen reduction; kinetics; tafel plots; cyclic voltammetry; rotating ring-disk electrode;

D O I：

10.1016/S0013-4686(99)00439-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior and the electrocatalytic activity of ruthenium electrode for oxygen reduction are examined using cyclic voltammetry and rotating ring-disk electrode techniques. A surface oxide film on ruthenium metal is formed when the potential is scanned in the positive direction of hydrogen adsorption and evolution region. This oxide him affects the activity of ruthenium for oxygen reduction reaction. Oxygen reduction on ruthenium electrode proceeds primarily by a direct 4-electron reduction pathway without producing significant amounts of solution phase peroxide. The kinetic results suggest the initial electron transfer as the rate-determining step. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：2289 / 2296

页数：8

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