Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (03): 627-632.doi: 10.3866/PKU.WHXB20110240

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Catalytic Oxidation of Sulfide Ion over a Spherular-Co3O4 Electrode

LAO Guo-Hong1, SHAO Hai-Bo1, FAN Yu-Qian1, WANG Jian-Ming1, ZHANG Jian-Qing1,2, CAO Chu-Nan1,2   

  1. 1. Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China;
    2. S. tate Key Laboratory for Corrosion and Protection of Metal, Institute of Metal Research, Chinese Academy of Sciences, Shengyang 110016, P. R. China
  • Received:2010-10-13 Revised:2010-12-07 Published:2011-03-03
  • Contact: SHAO Hai-Bo E-mail:haohb@zju.edu.cn
  • Supported by:

    The project was supported by the Natural Science Foundation of Zhejiang Province, China (Y406192) and Specialized Research Fund for the Doctoral Program of Higher Education, China (20070335157).

Abstract:

Spherular-Co3O4 particles were synthesized on graphite electrode surface by ammonia-evaporation-induction. Its electrooxidation catalytic behavior for sulfide ions in an alkaline solution was investigated by electrochemical measurements such as potentiodynamic scanning and potentiostatic polarization. We found that high catalytic activity and the highest current density of 580 mA·cm-2 were obtained at -0.40 V. In addition, its catalytic performance was stable during potentiostatic polarization. Electrochemical impedance spectroscopy (EIS) indicated a low charge transfer resistance, which explained the high catalytic activity from the viewpoint of electrochemical kinetics.

Key words: Co3O4 electrode, Sulfide ion, Electrocatalysis

MSC2000: 

  • O646