草酸在铂基Sb-Pb表面合金电极上的催化还原  

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

作　　者：夏盛清[1] 陈声培[1] 孙世刚[1] 

机构地区：[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

出　　处：《物理化学学报》2001年第2期140-143,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金!( 29973035);福建省自然科学基金!( E9910003)&&

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 .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.

关 键 词：草酸 铂基锡铅表面合金电极 电催化活性 电催化还原 

分 类 号：O646[理学—物理化学]