改进柠檬酸络合法制备CuO-CeO_2及其CO低温氧化催化性能  

Preparation of CuO-CeO_2 by modified citrate method and its catalytic activity for low temperature CO oxidation

作　　者：毛东森[1] 陶丽华[1] 郭杨龙[2] 卢冠忠[1,2] 

机构地区：[1]上海应用技术学院应用催化研究所,上海200235 [2]华东理工大学工业催化研究所,上海200237

出　　处：《工业催化》2008年第10期21-24,共4页Industrial Catalysis

基　　金：国家重点基础研究发展计划(973计划)(2004CB719501);上海市科委重点科研项目(06JC14095)

摘　　要：采用改进的柠檬酸络合法即以乙醇代替水作溶剂制备CuO-CeO2催化剂,应用N2物理吸附、XRD和H2-TPR等技术对催化剂进行了表征,并采用微反-色谱装置考察了其对CO低温氧化反应的催化活性。结果表明,常规柠檬酸络合法所制备的CuO-CeO2催化剂中仅存在一种与CeO2相互作用较弱、粒子较大的CuO,而采用改进的柠檬酸络合法所制备的催化剂中除此之外还存在与CeO2相互作用较强、粒子较小的高度分散的CuO,从而具有更高的CO低温氧化活性。CuO-CeO2 catalyst was prepared by modified citrate method using ethanol instead of water as the solvent. The catalyst was characterized by N2 adsorption, XRD and H2-TPR and its catalytic activity for low temperature CO oxidation was investigated in a microreactor-GC system. The results indicated that there existed only larger CuO partMes less associated with ceria in the catalyst prepared by conventional method, while there existed highly dispersed CuO with strong interaction with ceria in the catalyst prepared by the modified method; the latter thus had higher catalytic activity for low temperature CO oxidation.

关 键 词：催化化学 改进柠檬酸络合法 CuO—CeO2催化剂 CO低温氧化 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]