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采用欠电位沉积法,以铅电极作基体制备了负载型Pt-Sn双金属催化电极。应用循环伏安法和电位阶跃法研究了各种因素对该电极的催化活性和稳定性的影响,并应用XPS和AES技术分析了该电极的表面物性。该电极对酸性介质中的甲醇氧化反应显示出高于Pt-Sn/Pt电极的催化活性和稳定性。
Using under-voltage deposition method, a supported Pt-Sn bimetallic catalytic electrode was prepared by using lead electrode as substrate. The effects of various factors on the catalytic activity and stability of the electrode were studied by cyclic voltammetry and potential step method. The surface properties of the electrode were analyzed by XPS and AES. The methanol oxidation reaction of the electrode in acidic medium showed higher catalytic activity and stability than Pt-Sn / Pt electrode.