物理化学学报 >> 2002, Vol. 18 >> Issue (03): 243-247.doi: 10.3866/PKU.WHXB20020311

研究论文 上一篇    下一篇

聚合物固载Co-Pd 催化剂的结构与活性

黄唯平;郑修成;张守民;邱晓航;李保庆;吴世华   

  1. 南开大学化学系,天津 300071
  • 收稿日期:2001-06-19 修回日期:2001-12-06 发布日期:2002-03-15
  • 通讯作者: 吴世华 E-mail:wushihuae@eyou.com

Structure and Activity of Polymer Immobilized Co-Pd Catalysts

Huang Wei-Ping;Zheng Xiu-Cheng;Zhang Shou-Min;Qiu Xiao-Hang;Li Bao-Qing;Wu Shi-Hua   

  1. Department of Chemistry,Nankai University,Tianjin 300071
  • Received:2001-06-19 Revised:2001-12-06 Published:2002-03-15
  • Contact: Wu Shi-Hua E-mail:wushihuae@eyou.com

摘要: 采用溶剂化金属原子浸渍(SMAI)法制备了几种不同金属含量的CoPd催化剂,用X射线衍射、X射线光电子能谱和磁测定对催化剂进行表征,并与普通浸渍法(CI)制得的相同金属含量的催化剂进行比较.结果表明SMAI法制备的催化剂金属粒度小于CI法制备的催化剂,且前者零价金属含量高于后者.SMAI法制备的催化剂Co在表面上富集,而CI法制备的催化剂Co在表面和体相的金属含量基本相同.在二丙酮醇加氢及电催化反应中, SMAI法催化剂比相同组成的CI法催化剂具有更高的催化活性.

关键词: 溶剂化金属原子, 聚合物固载Co-Pd双金属催化剂, 燃料电池电极, 加氢

Abstract: Solvated metal atom impregnation (SMAI) method was used to prepare polymer immobilized metal catalysts under mild conditions.Several SMAI CoPd catalysts with different metal contents were prepared.These catalysts were studied by Xray diffraction (XRD),Xray photoelectron spectroscopy (XPS) and magnetic measurement.Compared with catalysts prepared by common impregnation (CI) method,the particle sizes of the metal in SMAI catalysts were much smaller.The contents of zerovalent state metallic Co and Pd in SMAI catalysts were higher than those in CI catalysts.The Co atoms were enriched on the surface for SMAI catalysts,whereas the Co atom concentration on the surface was essentially the same as in the bulk for CI catalysts.The catalytic activity of SMAI catalysts was much greater than that of CI catalysts with the same composition in hydrogenation of diacetone alcohol and O2 reduction on fuel cell electrodes.

Key words: Solvated metal atom, Polymer immobilized Co-Pd bimetallic catalysts,  Fuel cell electrode, Hydrogenation