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Citation: Xia Sheng-Qing, Chen Sheng-Pei, Sun Shi-Gang. Electrocatalytic Reduction of Oxalic Acid on Platinum Based PbSb Surface Alloy Electrode[J]. Acta Physico-Chimica Sinica, ;2001, 17(02): 140-143. doi: 10.3866/PKU.WHXB20010210 shu

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

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 Date: 5 June 2000
Available Online: 15 February 2001

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.
- Sb-Pb-Pt/GC surface alloy electrode;Oxalic acid;Glyoxylic acid; Electrocatalytic reduction
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