Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (04): 409-412.doi: 10.3866/PKU.WHXB19910407

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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

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