化学学报 ›› 1996, Vol. 54 ›› Issue (8): 807-812. 上一篇    下一篇

研究论文

微电极对多步电极反应(EE反应)稳态过程的研究

庄乾坤;陈洪渊   

  1. 南京大学化学系
  • 发布日期:1996-08-15

The kinetic study of multistep electrode processes at microelectrodes under steady-state conditions

ZHUANG   

  • Published:1996-08-15

本文推导了微盘及微球电极上EE反应的一般稳态电流表达式; 对ErEr,EqEr, EiEr, ErEq, ErEi, EiEi及EqEq各反应机理进行了详细讨论; 并以亚硫酰氯的还原反应为特例进行了研究及动力学常数的测定。

关键词: 反应机理, 反应速度常数, 微电极, 电极反应, 亚硫酰氯

A general current-potential expression for the first order EE reactions at disk and spherical microelectrodes on the basis of the equal fluxes under steady-state conditions was derived. According to the classification for the voltammetric experiments that presented in our previous work, the characteristics of the ErEr, EqEr, EiEr, ErEq, ErEi, EiEi, EqEq and EE∞ mechanisms are also discussed. Obviously, it expressed the electrode processes in concept more concisely. In this work, we also presented some methods for the determination of kinetic parameters in various systems and examplified by the reduction of thionyl chloride (SOCl2) in dimethyl formamide (DMF).

Key words: REACTION MECHANISM, REACTION RATE CONSTANT, MICROELECTRODE, ELECTRODE REACTION

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