物理化学学报 >> 2001, Vol. 17 >> Issue (02): 140-143.doi: 10.3866/PKU.WHXB20010210

研究论文 上一篇    下一篇

草酸在铂基Sb-Pb表面合金电极上的催化还原

夏盛清;陈声培;孙世刚   

  1. 固体表面物理化学国家重点实验室，厦门大学化学系，物理化学研究所，厦门　361005
  • 收稿日期:2000-06-05 修回日期:2000-08-31 发布日期:2001-02-15
  • 通讯作者: 孙世刚 E-mail:sgsun@xmu.edu.cn

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 E-mail:sgsun@xmu.edu.cn

PDF

3381

赞

摘要： 将SbPbPt/GC表面合金电极应用于草酸的电催化还原，发现所制备的催化剂电极具有较高的电催化活性，草酸还原的起始电位约－0.4 V，与通常使用的铅阴极相比，正移了大约600 mV.电化学原位红外反射光谱研究，证实所研制的催化剂可在较低的过电位下还原草酸生成乙醛酸，并具有较好的选择性.对于所研制的表面合金电催化剂的实际应用进行了探讨.

关键词: Sb-Pb-Pt/GC表面合金电极, 草酸, 乙醛酸, 电催化还原

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