Electrochemical activity, stability and degradation characteristics of IrO2-based electrodes in aqueous solutions containing C1 compounds

被引：32

作者：

Hu, JM ^{[1
]}

Zhang, JQ

Meng, HM

Zhang, JT

Cao, CN

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China

[2] Univ Sci & Technol Beijing, Beijing Corros & Protect Ctr, Beijing 100083, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2005年 / 50卷 / 27期

基金：

中国国家自然科学基金;

关键词：

IrO2; electrochemical activity; stability; electrode degradation; C-1; compounds;

D O I：

10.1016/j.electacta.2005.03.016

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper, we investigate the electrocatalytic behavior and degradation characteristics of IrO2-based electrodes in Na2SO4 solutions containing C-1 compounds (CH3OH, HCHO and HCOOH). Decreases are generally observed in the electrochemically active area, electrochemical stability and durability of the electrodes in aqueous solutions in the presence of these organic substrates. The following sequence holds for the influence of C-1 compounds on the electrode properties (i.e. activity and stability): CH3OH > HCHO > HCOOH. The corrosion characteristics of electrode are studied by X-ray diffraction measurements. For the first time, the decomposition and dissolution of active oxide layers are quantitatively characterized from the decreases in cell volume of rutile-structured IrO2 crystallite and from the increases in texture coefficient of (0 0 2) planes, respectively, as a result of the accelerated lifetime tests. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：5370 / 5378

页数：9

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