Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (06): 716-720.doi: 10.3866/PKU.WHXB20060614

• ARTICLE • Previous Articles     Next Articles

Oxygen Reduction on Ni-MnO2 Electrode in Alkaline Solution

ZHAO Feng-Ming;MA Chun-An;CHU You-Qun;XU Ying-Hua   

  1. Research Center of Nano Science and Technology, Key Laboratory of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
  • Received:2005-11-01 Revised:2006-02-24 Published:2006-05-31
  • Contact: MA Chun-An E-mail:Science@zjut.edu.cn

Abstract: Manganese dioxide was synthesized by a spray pyrolysis method and Ni-MnO2 film-type electrode was prepared by a spray-coating approach as well. SEM and AFM in combination with electrochemical measures were employed to characterize the microstructure, electrocatalytic properties, and the correlation between electroreduction of oxygen and electrocatalysis of the Ni-MnO2 electrode. A reductive process of intermediate particle was discovered by fast cyclic voltammograms. The concentration of the intermediate particle could be cumulated and its life could be up to about 200 cycles. The reduction of the intermediate particle was the main reason of highly electrocatalytical activity for oxygen reduction reaction.

Key words: Spray pyrolysis, Ni-MnO2 film-type electrode, Oxygen reduction reaction