物理化学学报 >> 1993, Vol. 9 >> Issue (01): 27-34.doi: 10.3866/PKU.WHXB19930106

研究论文 上一篇    下一篇

微圆盘电极上耦合一级均相反应的稳态电流

廖川平   

  1. 重庆师范学院化学系,重庆 630047
  • 收稿日期:1991-08-20 修回日期:1992-01-21 发布日期:1993-02-15
  • 通讯作者: 廖川平

The Steady State Current With Coupled First-order Homogeneous Chemical Reactions

Liao Chuan-Ping   

  1. Department of Chemistry, Chongqing Teachers College, Chongqing 630047
  • Received:1991-08-20 Revised:1992-01-21 Published:1993-02-15
  • Contact: Liao Chuan-Ping

摘要: 在电极表面反应物浓度均匀的近似假设下, 得到了微圆盘电极上暂态可逆反应的一般解. 然后利用该一般解得到了微圆盘电极上耦合一级均相反应的可逆电极反应CE、EC、EC′和ECE 的稳态电流计算公式.

关键词: 微圆盘电极, 耦合均相反应的电极反应, 暂态可逆电极反应, 稳态电化学行为

Abstract: In this work, reversible microdisk electrode reactions with coupled first-order homogeneous chemical reactions are discussed by means of the equivalence between the recombinated steady state diffusion equations and the Laplace transformed tran-sient diffusion equation of electrode reactions. First, general solution for transient diffusion equation of reversible microdisk electrode reactions is derived with “uni-form concentration” approach which is acceptable if D_O is close to D_R. And then, expressions for steady state current of CE, EC, EC' and ECE reactions at microdisk electrode are derived with the help of that general solution.

Key words: Microdisk electrode, Transient reversible electrode reaction, Electrode reaction with coupled homogeneous chemical reaction, Steady state electrochemical behaviour