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在ITO导电玻璃上,采用循环伏安法制备Pt-Au复合催化剂.通过扫描电镜(SEM),X射线能量色散谱(EDX),X射线衍射(XRD)及其电化学方法对催化剂样品进行了表征.SEM结果表明,Pt-Au复合催化剂的形貌近似球状粒子.循环伏安法和计时电流法的测试结果表明,复合催化剂中Au的加入有利于甲醇的电催化氧化,并提高了Pt对甲醇氧化的抗毒化能力.同时研究了复合催化剂中Au的不同含量对甲醇氧化的影响,结果表明,当Pt和Au物质的量比为1.07:1时,Pt-Au/ITO催化剂具有最佳的甲醇电催化氧化活性.
The Pt-Au composite catalyst was prepared by cyclic voltammetry on ITO conductive glass.The catalyst samples were characterized by SEM, EDX, XRD and electrochemical methods The SEM results showed that the morphology of the Pt-Au composite catalyst was similar to that of the spherical particles.The cyclic voltammetry and chronoamperometry showed that the addition of Au in the composite catalyst was favorable for the electrocatalytic oxidation of methanol and the Pt Methanol oxidation was also studied.The effect of different Au content in the composite catalyst on methanol oxidation was also studied.The results showed that Pt-Au / ITO catalyst had the best catalytic activity when the molar ratio of Pt to Au was 1.07: 1 Methanol electrocatalytic oxidation activity.