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中文摘要：
直接以Pt，Ru，W，Ni和Sn的金属盐为前驱体，通过溶胶法制备了不同原子比的Pt—Ru—M／C（M=W，Ni，Sn）碳载纳米合金催化剂，用x射线衍射（XRD）和x光电子能谱（XPS）表征催化剂的晶相结构、表面组成及价态形式，采用循环伏安法测试催化剂电催化氧化甲醇活性．结果表明，掺杂M和W可明显提高Pt—Ru／C催化活性，掺杂Sn则降低了Pt—Ru／C催化活性．其中Pt3-Ru4-Ni0.7／c的活性最高，在1．0mol／LNaOH＋1．0mol／LCH3OH溶液中峰电流达835．2mA／mg，甲醇起始氧化电位比Pt5-Ru5／c低约0．11V．
英文摘要：
The catalysts of Pt-Ru-M/C （ M = W, Ni, Sn） with different atom ratio were prepared by colloidal method. The surface composition and crystal structure of nano-particle supported by carbon black were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst activity in different methanol and NaOH concentration electrolytes was measured by cyclic voltammeter. The results show that the performance of methanol electro-oxidation on the Pt-Ru/C catalysts can be improved markedly by doping with Ni and W, and be reduced by doping with Sn, and the peak current density on Pt5-Ru4-Ni07/C reaches 835.2 mA/ mg and the onset potential of methanol electro-oxidation is 0. 11 V lower than that of Pt5-Ru5/C in 1.0 mol/L NaOH ＋ 1.0 mol/L CH3 OH.
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