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中文摘要：
文章采用强迫沉积法在Ptmesh上沉积单金属Ru和三金属Rh、Ru、Pt制得了金薄膜催化剂，分别记为Ru／Ptmesh、Pt／Rh—R矿Pt／Ptmesh．通过循环伏安法（CV）对催化剂进行了表征，并以甲醇氧化为探针反应，研究了金属薄膜催化剂的电催化活性．结果表明，随着Ru沉积量的增加，甲醇在Run／Ptmesh表面上的氧化峰电流逐渐减小，氧化峰电势不断负移；对于三金属薄膜催化剂，甲醇氧化峰电流随Ru沉积量的增加先增大后减小，而随Rh沉积量的增加，甲醇氧化电流却逐渐减小，氧化峰电势随Rh、Ru加入量的增加也发生了很大的变化．其中，Pt2／Rh，Ru。Pt，／Ptmesh金属薄膜催化剂表现出最高的表面催化活性，甲醇的氧化峰电势负移约90mV，氧化峰电流密度为Ptmesh峰电流密度的2．8倍，说明PtRuRh三元金属催化剂具有很好的应用前景．
英文摘要：
Using Pt mesh as substrate, Ru and PtRhRu thin film deposits were prepared by forced deposi- tion. The model Ru/Ptmesh and ternary metallic catalyst PtRhRu/Ptmesh were characterized by cyclic voltam- metry while their catalytic properties in electrooxidation of methanol were studied as well. The results showed that on Ru/Ptmesh surface, the methanol oxidation potential shifted negatively whereas the current density decreased gradually with Ru deposit increasing. The electrocatalytic activity of PtRhRu/Ptmesh thin film in methanol oxidation decreased with Rh content increase,however,it showed different regularity with Ru content increase, that is, the activity was enhanced with Ru increase at the first stage and then decreased after more Ru deposited. Indicating the synergistic function of Rh and Ru varies with the relative content.
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