Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (05): 446-450.doi: 10.3866/PKU.WHXB19960512

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Study of the Reduction Mechanism of MnO2 by Rotating Ring-Disk Electrode

Tian Jian-Hua,Gu Lin-Ying   

  1. Department of Applied Chemistry,Tiajin University,Tianjin 300072
  • Received:1995-08-14 Revised:1995-11-13 Published:1996-05-15
  • Contact: Gu Lin-Ying

Abstract:

The cathodic reduction mechanism of MnO2 electrode is studied by means of the rotating ring-disk electrode. The mass transport process in the solution plays an important role in the reduction process of MnO2 electrode. The relation between IR-1 and ω-1/2 is deduced as a diagnostic criterion of the reduction mechanism. The dissolution-precipitation and the electron-proton mechanism occur simultaneously but the relative contributions are quite different in various pH value solutions.

Key words: MnO2, Rotating ring-disk electrode, Cathodic reduction of MnO2