Pt/C催化剂对乙醇电氧化的粒径效应  

Electrocatalytic Oxidation of Ethanol on Pt/C Catalysts with Different Pt Particle Sizes

作　　者：唐亚文[1] 马国仙[2] 周益明[2] 包建春[2] 陆路德[1] 陆天虹[2] 

机构地区：[1]南京理工大学材料化学实验室,南京210094 [2]南京师范大学化学与环境科学学院,南京210097

出　　处：《物理化学学报》2008年第9期1615-1619,共5页Acta Physico-Chimica Sinica

基　　金：国家863基金(2006AA05Z137,2007AA05Z143);国家自然科学基金(20573057);江苏省科技厅基金(BK2006224);江苏省教育厅基金(05KJB150061)资助项目

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.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.

关 键 词：铂 催化剂 乙醇氧化 粒径效应 

分 类 号：O643.3[理学—物理化学]