Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (02): 140-143.doi: 10.3866/PKU.WHXB20010210

• ARTICLE • Previous Articles     Next Articles

Electrocatalytic Reduction of Oxalic Acid on Platinum Based PbSb Surface Alloy Electrode

Xia Sheng-Qing;Chen Sheng-Pei;Sun Shi-Gang   

  1. State Key Laboratory for Physical Chemistry of the Solid Surface,Department of Chemistry, Xiamen University,Institute of Physical Chemistry, Xiamen University, Xiamen 361005
  • Received:2000-06-05 Revised:2000-08-31 Published:2001-02-15
  • Contact: Sun Shi-Gang

Abstract: The platinum based PbSb surface alloy supported on glassy carbon prepared by electrochemical codeposition has been applied to the reduction of oxalic acid. The results demonstrated that the surface alloy electrode exhibited a high activity, and reduced significantly the overpotential. In comparison with a lead cathode that was used usually in industry for the reduction of oxalic acid, the onset potential of oxalic acid reduction was shifted positively from 1.0 V on Pb to -0.4 V on the surface alloy electrode. The main product species were determined as glyoxylic acid by using in situ FTIR spectroscopy, illustrating that the surface alloy electrode exhibited also a high selectivity towards oxalic acid reduction.

Key words: Sb-Pb-Pt/GC surface alloy electrode, Oxalic acid, Glyoxylic acid, Electrocatalytic reduction