物理化学学报 >> 2007, Vol. 23 >> Issue (04): 559-564.doi: 10.1016/S1872-1508(07)60037-0

研究论文 上一篇    下一篇

四氢呋喃-水-乙醇三元溶液体系制备高合金化Pt-Ru/CMK-3催化剂

吴伟; 曹洁明; 陈煜; 陆天虹   

  1. 南京航空航天大学材料科学与技术学院, 南京 210016; 南京师范大学化学系, 南京 210097
  • 收稿日期:2006-09-18 修回日期:2006-12-14 发布日期:2007-04-05
  • 通讯作者: 曹洁明 E-mail:jmcao@nuaa.edu.cn

Preparation of High-alloying Pt-Ru/CMK-3 Catalysts in THF-H2O-EtOH Ternary Solution System

WU Wei; CAO Jie-Ming; CHEN Yu; LU Tian-Hong   

  1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China; Department of Chemistry, Nanjing Normal University, Nanjing 210097, P. R. China
  • Received:2006-09-18 Revised:2006-12-14 Published:2007-04-05
  • Contact: CAO Jie-Ming E-mail:jmcao@nuaa.edu.cn

摘要: 提出了在四氢呋喃(THF)、H2O和乙醇三元体系中用一般的化学还原法在室温下制备高合金化Pt-Ru/CMK-3催化剂的新方法. 与在纯水中制得的商品化ETEK催化剂相比, 其Pt-Ru粒子的合金化程度高、平均粒径较小且相对结晶度低, 因此, 该催化剂对甲醇氧化的电催化活性远高于在纯水中制得的Pt-Ru催化剂. 高合金化程度的原因是H2PtCl6和RuCl3在THF、H2O和乙醇三元溶液体系中的起始还原电位相近. 此外, CMK-3以其规整的二维有序孔道结构, 为直接甲醇燃烧电池(DMFC)中电子和物质的传输提供了方便的路径, 其巨大的比表面积也为Pt-Ru 纳米粒子的均匀分散提供了良好的载体.

关键词: 直接甲醇燃料电池, Pt-Ru/C 催化剂, 四氢呋喃, 合金化程度

Abstract: The Pt-Ru particles of Pt-Ru/CMK-3 catalyst were found to possess high degree of alloying, small average size, and low relative crystallinity when the Pt-Ru/CMK-3 catalyst was prepared using the general chemical reduction method in the ternary solution system containing tetrahydrofuran (THF), H2O, and ethanol. The Pt-Ru/CMK-3 catalyst showed high electrocatalytic activity for methanol oxidation. It indicated that the alloying degree of Pt-Ru could significantly affect the electrocatalytic activity for methanol oxidation. The Pt-Ru/CMK-3 catalyst with high alloying degree can be obtained because THF and H2PtCl6 can forma complex leading to the reduction potentials of H2PtCl6 and RuCl3, which are close to each other in the aqueous solution with THF.

Key words: Direct methanol fuel cell, Pt-Ru/C catalyst, Tetrahydrofuran, Alloying degree

MSC2000: 

  • O646