Oxygen evolution reaction on IrO2-based DSA® type electrodes:: kinetics analysis of Tafel lines and EIS

被引：367

作者：

Hu, JM ^{[1
]}

Zhang, JQ ^{[1
]}

Cao, CN ^{[1
]}

机构：

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

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2004年 / 29卷 / 08期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

oxygen evolution reaction; IrO2; Tafel lines; impedance; mechanistic aspects;

D O I：

10.1016/j.ijhydene.2003.09.007

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 oxygen evolution reaction (OER) on IrO2-Ta2O5 mixed oxide electrodes in H2SO4 solution was studied by performing quasi-stationary current-potential and electrochemical impedance spectroscopy (EIS) measurements. The uncompensated resistance corrected Tafel lines displayed two distinct linear regions, with one of the slope close to 60 mV dec(-1) in the low potential region and the other close to 130 mV dec(-1) in the high potential region. The kinetics equations based on the proposed OER mechanism were derived and were used to simulate the current-potential curve. A mathematical deduction of EIS data was also carried out based on one state-variable theory. Both the polarization curve and impedance spectra were well approximated by kinetics analysis. (C) 2003 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：791 / 797

页数：7

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