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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第2期143-147,共5页
Acta Chimica Sinica
基金
上海市科技发展基金
