催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (10): 844-846.

• 研究快讯 • 上一篇    下一篇

尿素燃烧法制备Cu-Ce-O催化剂用于消除CO

胡涛1,2,杨建1,赵军1,王丹君1,2,宋焕玲1,丑凌军1   

  1. 1 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室, 甘肃兰州 730000; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2007-10-25 出版日期:2007-10-25 发布日期:2011-10-28

Preparation of a Cu-Ce-O Catalyst by Urea Combustion for Removing CO from Hydrogen

HU Tao1,2, YANG Jian1, ZHAO Jun1, WANG Danjun1,2, SONG Huanling1, CHOU Lingjun1*   

  1. 1 State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, Gansu, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China, China
  • Received:2007-10-25 Online:2007-10-25 Published:2011-10-28

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摘要： 采用尿素燃烧法制备了Cu-Ce-O催化剂,考察了不经过焙烧处理的催化剂在干、湿两种气氛下催化CO选择氧化消除反应. 结果表明,在燃料电池电极工作温度区间内, Cu-Ce-O催化剂表现出良好的活性和选择性. 在模拟真实气体气氛下,在130 ℃时催化剂上CO的转化率达到99.3%, CO2选择性也高达75%. X射线衍射和扫描电镜表征结果显示,催化剂表面存在着纳米级、高分散的铜物种.

关键词: 氧化铜, 氧化铈, 一氧化碳, 选择氧化, 湿气, 尿素燃烧法

Abstract: A urea combustion method was employed for the preparation of the Cu-Ce-O catalyst without the need for a binder or additional calcination steps. The catalytic performance of the catalyst for preferential oxidation of CO was investigated under dry and humid feed gas conditions, and the catalyst was also examined for CO removal at the operating temperature of the PEMFC anode. A 99.3%CO conversion and 75% selectivity for CO2 could be achieved at 130 ℃ in the presence of H2O and CO2. The results of XRD and SEM characterizations indicated that copper oxides were highly dispersed on the catalyst and formed nanoparticles.

Key words: copper oxide, cerium oxide, carbon monoxide, preferential oxidation, moist gas, urea combustion