Catalytic Activity of Iridium Dioxide With Different Morphologies for Oxygen Reduction Reaction

文献类型： 外文期刊

第一作者： Wang Guangjin

作者： Wang Guangjin;Xu Tian;Yu Yi;Cheng Feng;Zhang Yue;Pan Mu;Wang Guangjin;Xu Tian;Yu Yi;Cheng Feng;Zhang Yue;Pan Mu;Wang Guangjin;Huang Fei

作者机构：

关键词： Iridium dioxide;modified sol-gel method;Adams method;oxygen reduction reaction

期刊名称：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION （ 影响因子：0.957； 五年影响因子：0.959 ）

ISSN： 1000-2413

年卷期： 2015 年 30 卷 5 期

页码：

收录情况： SCI

摘要： Iridium dioxide with different morphologies (nanorod and nanogranular) is successfully prepared by a modified sol-gel and Adams methods. The catalytic activity of both samples for oxygen reduction reaction is investigated in an alkaline solution. The electrochemical results show that the catalytic activity of the nanogranular IrO2 sample is superior to that of the nanorod sample due to its higher onset potential for oxygen reduction reaction and higher electrode current density in low potential region. The results of Koutecky-Levich analysis indicate that the oxygen reduction reaction catalyzed by both samples is a mixture transfer pathway. It is dominated by four electron transfer pathway for both samples in high overpotential area, while it is controlled by two electron transfer process for both samples in low overpotential area.

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