文献类型：期刊文献

中文题名：气体扩散电极高超电位区伏安关系的研究

英文题名：A Study on the Voltammetric Relation of Gas Diffusion Electrodes Working in High Overpotential Region

作者：陆兆锷[1];钱炜民[1];钟天耕[1];方国女[1]

机构：[1]华东化工学院化学系

年份：1990

卷号：48

期号：2

起止页码：143

中文期刊名：化学学报

外文期刊名：Acta Chimica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金：上海市科技发展基金

语种：中文

中文关键词：气体扩散电极;伏安关系

摘要：在气体扩散电极的薄层平板模型基础上,推演出在高超电位区电位与总表观电流密度呈线性关系的简化式。直线段的斜率项包含传质参数和电极结构参数。调节这些参数可以减小斜率,从而提高电极的电催化活性。把简化式应用于氧还原为过氧化氢的反应,研究氢氧化钾浓度对斜率值的影响。公式的推论与实验结果相符。
A simplified voltammetric relation was derived for gas diffusion electrodes working in high overpotential region. According to the equation the potential varies linearly with the current density and the slope term consists of parameters describing mass transfer and structunal effects. The slope may be decreased by adjusting these parameters properly in order to improve the electrode performence. The slopes predicted by the equation were found to be on good agrcement with experimental ones for an oxygen diffusion electrode, which was used to prepare H_2O_2 in KOH solution.