物理化学学报 >> 1991, Vol. 7 >> Issue (04): 409-412.doi: 10.3866/PKU.WHXB19910407

研究论文 上一篇    下一篇

MnO2电极的循环伏安光电化学测量

杨华铨; 刘欣; 蔡生民; 周国定   

  1. 北京大学化学系,北京 100871
  • 收稿日期:1990-03-17 修回日期:1990-07-04 发布日期:1991-08-15
  • 通讯作者: 杨华铨

A Photoelectrochemical Study of Cyclic Voltammetry of MnO2 Electrode

Yang Hua-Quan; Liu Xin; Cai Sheng-Min; Zhou Guo-Ding   

  1. Department of Chemistry, Peking Univesity, Beijing 100871; Shanghai Institute of Electrio Power
  • Received:1990-03-17 Revised:1990-07-04 Published:1991-08-15
  • Contact: Yang Hua-Quan

摘要: 用循环伏安法的光电化学现场测量研究了γ-MnO_2在充放电过程中的电化学和光电化学性质, γ-MnO_2本身的光电流为正值, 在阴极还原过程中光电流不断减小, 由正值变为负值。说明γ-MnO_2是n型半导体, 阴极还原过程相当于对γ-MnO_2进行了p型掺杂。

关键词: MnO2, 循环伏安法, 光电化学

Abstract: Electrochemical and photoeletrochemical properties of electrodepositing γ-MnO_2 are studied when it is charged and discharged in 1 mol·L~(-3) KOH using cyclic voltammetry and in-situ photoelectrochemical method. When γ-MnO_2 is reduced,the photocurrent decreases from positive to negative. We concluded that γ-MnO_2 is a n-type semiconductor, but it is p-type doped during the reduction processes.

Key words: MnO2, Cyclie Voltammetry method, Photoelectrochemical method