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中文摘要：
利用有机溶胶方法,通过控制溶剂挥发温度制备了具有不同粒径大小的Pt/C催化剂.制得的Pt/C催化剂中,Pt粒子具有非常优异的均一性和良好的分散度.电化学研究表明,对于乙醇的电催化氧化,Pt/C催化剂存在着明显的粒径效应.当Pt粒子粒径为3.2nm时,Pt/C催化剂对乙醇的电催化氧化的质量比活性最佳.X射线光电子能谱（XPS）的研究显示,Pt/C催化剂对乙醇氧化的粒径效应与其零价Pt含量以及Pt粒子的比表面积密切相关.
英文摘要：
Pt/C catalysts with different Pt particle sizes were prepared with the organic sol method. Pt particles in the Pt/C catalyst had high dispersity and excellent homogenicity. The electrochemical study indicated that there was an obvious size effect of Pt particles on the electrocatalytic oxidation of ethanol. The Pt/C catalyst with 3.2 nm average size of the Pt particles exhibited the optimal electrocatalytic activity for the ethanol oxidation. The study of X-ray photoelectron spectroscopy （XPS） showed that the size effect of Pt/C catalysts on the electrocatalytic oxidation of ethanol was closely related to the Pt^0 content and the specific surface area of the Pt particles.
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