nano-Pt/GC电极的制备及对甲酸电催化氧化  

Investigation of Electrocatalytic Oxidated Performance for Formic Acid on Nano-Pt/GC Electrode

作　　者：过家好[1] 陈忠平[1] 

机构地区：[1]安徽科技学院化学系,安徽凤阳233100

出　　处：《安徽科技学院学报》2007年第3期22-26,共5页Journal of Anhui Science and Technology University

基　　金：安徽省教育厅高校青年基金(2005jql089);安徽科技学院引进人才专项基金(ZRC200438);安徽科技学院重点学科建设基金(YZD2004021)

摘　　要：应用循环伏安法制备了nano-Pt/GC修饰电极,优化了铂微粒在电极表面的沉积条件,并用扫描电子显微镜(SEM)和在硫酸中的循环伏安曲线对其进行了表征,结果表明铂微粒较为均匀地分散在玻碳电极表面,粒径约为140nm,电极具有很大的比表面积。实验研究表明nano-Pt/GC修饰电极对甲酸电氧化的催化性能明显好于铂片电极,在该电极上甲酸正向扫描和反向扫描时的氧化峰电流分别是铂片电极上的4.37倍和3.49倍,有效地提高了金属铂的利用率,玻碳电极上铂微粒的最佳沉积条件为循环次数为100次、沉积速度为5mV/s。The nano - Pt/GC decorated electrode was prepared with the cyclic vohammetry. The deposited conditions were optimized. The decorated electrode was characterized by SEM and cyclic voltammogram curves in H2SO4 solution. It was found that the platinum particles were evenly dispersed in the electrode surface and the particle size was approximately 140nm, and the electrode had a very big relative surface. A circulation volt - ampere experiment indicated that catalyzed performance of nano -Pt/GC decorated electrode for the formic acid＇s electrooxid - ation is better than platinum foil. The oxidized peak current of formic acid for the scanning and the reversed scaning on the nano - Pt/GC decorated electrode was 4.37 times and 3.49 times that on pure Pt electrode. The use ratio of platinum was effectively improved. The best deposited conditions were that the cyclic times were 100 and the deposition rate was 5 mV/s.

关 键 词：nano—Pt/GC电极 循环伏安 甲酸 电催化氧化 

分 类 号：O646.5[理学—物理化学]