Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (07): 636-640.doi: 10.3866/PKU.WHXB20010713

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Observation of Electron-Transfer Inverted Region in γ-MnO2/K3[Fe(CN)6] Solution Interface

Guo Yuan;Li Yong-Jun;He Mao-Xia;Xia Xi   

  1. Institute of Applied Chemistry,Xinjiang University,Urumqi 830046
  • Received:2000-11-15 Revised:2001-01-23 Published:2001-07-15
  • Contact: Guo Yuan E-mail:guoyuan@xju.edu.cn

Abstract: One of the main achievments of Marcus electron-transfer theory is the predictions of the existence of normal and inverted regions.Conformation of the existence of inverted regions has been a hot point by experiments.The direct el ectron-transfer rate constants were worked out between conduction band and the γ-MnO2/K3[Fe(CN)6] soluton interface by measuring the flat band potentials and the Tafel plots and Marcus type inverted regions were observed from logket~V(a pplied bias potential) curve.Furthermore,the existence of inverted regions was d emonstrated theoretically in direct electron transfers between the semiconductor /electrolyte interface.

Key words: Marcus inverted region, Electron-transfer, Kinetics, Manganese dioxide