物理化学学报 >> 2008, Vol. 24 >> Issue (09): 1615-1619.doi: 10.3866/PKU.WHXB20080915

研究论文 上一篇    下一篇

Pt/C催化剂对乙醇电氧化的粒径效应

唐亚文; 马国仙; 周益明; 包建春; 陆路德; 陆天虹   

  1. 南京理工大学材料化学实验室, 南京 210094; 南京师范大学化学与环境科学学院, 南京 210097; 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:2008-02-13 修回日期:2008-04-30 发布日期:2008-09-10
  • 通讯作者: 陆天虹 E-mail:tianhonglu@263.net

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

TANG Ya-Wen; MA Guo-Xian; ZHOU Yi-Ming; BAO Jian-Chun; LU Lu-De; LU Tian-Hong   

  1. Laboratory of Materials Chemistry, Nanjing University of Science and Technology, Nanjing 210094, P. R. China; College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, P. R. China; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2008-02-13 Revised:2008-04-30 Published:2008-09-10
  • Contact: LU Tian-Hong E-mail:tianhonglu@263.net

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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3.2 nm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.

关键词: 铂, 催化剂, 乙醇氧化, 粒径效应

Abstract: 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/Ccatalysts on the electrocatalytic oxidation of ethanol was closely related to the Pt0 content and the specific surface area of the Pt particles.

Key words: Pt, Catalyst, Ethanol oxidation, Particle size effect