Behavior of cobalt oxide electrodes during oxidative processes in alkaline medium

被引：160

作者：

Palmas, S. ^{[1
]}

Ferrara, F. ^{[1
]}

Vacca, A. ^{[1
]}

Mascia, M. ^{[1
]}

Polcaro, A. M. ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Ingn Chim & Mat, I-09123 Cagliari, Italy

来源：

ELECTROCHIMICA ACTA | 2007年 / 53卷 / 02期

关键词：

oxygen evolution; reaction mechanism; alkaline solution; impedance; cobalt oxide electrodes;

D O I：

10.1016/j.electacta.2007.01.085

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The behaviour Of Co3O4 electrodes was investigated in alkaline solution during oxidative runs at different anodic potentials up to the value of oxygen evolution reaction (OER). Voltammetric results indicate the presence of several solid-state surface redox transitions (SSSRT) which lead to the formation of Co(IV) containing species which are the specific catalytic phases for OER. Electrochemical impedance measurements were done in different ranges of potential and frequency in order to better characterise the SSSRT and the capacitive response of the electrode/electrolyte interface. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：400 / 406

页数：7

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