硅钨酸修饰多晶铂电极及其电催化性能

Electrochemical Behavior of Silicatungstic Acid Modified Platinum Electrode and Its Performance of Electrocatalysis to Methanol Oxidation

摘要:

通过循环伏安扫描制备了硅钨酸修饰多晶铂电极，在电极制备过程中发现，SiW12在Pt电极表面的氢区发生了氧化-还原反应，而在氧区使电极表面含氧粒子的吸附增加。通过循环伏安和恒电位I-t曲线研究了该修饰电极在硫酸溶液中的电化学行为和对甲醇氧化的电催化作用。研究结果表明：硅钨酸修饰多晶铂电极提高了甲醇氧化的催化活性和抗CO中毒性。

Abstract:

The SiW12 modified Pt electrode was prepared by a cyclic voltammetry scan in H2SO4 containing SiW12. During the preparation of modified electrode, we found a redox reaction of SiW12 in hydrogen area on the Pt electrode, but the adsorption increasing for the particles containing Oxygen in Oxygen area on the electrode surface. The electrochemical behaviour of this modified electrode in H2SO4 and its electrocatalytic effect to methanol oxidation were studied by cyclic voltammograms and I-t curves of constant voltage. The results show that the Pt electrode modified by Silicatungstic acid has not only the higher catalytic activity to methanol oxidation, but also the effect decreasing CO poison.