Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (02): 182-185.doi: 10.3866/PKU.WHXB20040215

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Electrocatalytic Activities and Preparation of Nanocrystalline TiO2 -Pt Modified Electrode

Chu Dao-Bao;Wang Feng-Wu;Wei Yi-Jun;Yao Wen-Li;Li Xiao-Hua   

  1. College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000; 2Huainan Teachers College, Huainan 232001
  • Received:2003-06-05 Revised:2003-08-26 Published:2004-02-15
  • Contact: Chu Dao-Bao E-mail:dbchu@sina.com

Abstract: The nanocrystalline TiO2-Pt modified titanium (Ti/nano-TiO2-Pt) electrode was prepared by electrosynthesis and direct hydrolysis and electrodeposited Pt on nanocrystalline TiO2 film. SEM was used to characterize the structure of Ti/nano-TiO2-Pt (Pt micro particle 60 nm). Redox behaviors of the Ti/nano-TiO2-Pt electrode, as well as the electrocatalytic activity of the Ti/nano-TiO2-Pt electrode for Mn2+ oxydized to Mn3+ were investigated by cyclic voltammetry and bulk electrolysis. The results indicated that there was high electrocatalytic activity of the Ti/nano-TiO2-Pt electrode for Mn2+ oxydized to Mn3+; The electrocatalytic activity of the Ti/nano-TiO2-Pt electrode was higher than Pt electrode. In preparative electrolysis under heterogeneous optimal conditions, average current efficiency for Mn3+ was 86%.

Key words: Nanocrystalline TiO2-Pt electrode, Electrocatalysis, Mn3+/Mn2+, Electrolytic oxidation, Cyclic voltammetry