CuO-CeO_2的固相反应法制备及其催化CO低温氧化性能  

Low Temperature Oxidation of CO over CuO-CeO_2 Catalyst Prepared by Solid-State Chemical Reaction

作　　者：毛东森[1] 陶丽华[1] 王倩[1] 郭杨龙[2] 卢冠忠[1,2] 

机构地区：[1]上海应用技术学院化学与环境工程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：《无机化学学报》2010年第3期447-452,共6页Chinese Journal of Inorganic Chemistry

基　　金：上海市科委重点科研项目(No.06JC14095);上海市教委重点学科建设项目(J51503);上海应用技术学院科技发展基金资助项目(No.KJ2008-01)

摘　　要：采用固相化学反应法制备了一系列CuO-CeO_2催化剂,并用X-射线衍射(XRD)、程序升温还原(H_2-TPR)和氮吸附等技术对样品进行了表征,利用微反-色谱装置考察了其催化CO低温氧化反应的活性,研究了CuO含量和催化剂焙烧温度对CuO-CeO_2催化活性的影响。结果表明,随着CuO含量的增加,CuO-CeO_2的催化活性提高,至不小于15%时达到稳定;随焙烧温度的升高,CuO-CeO_2的催化活性先提高,至650℃时达到最大,之后又降低。CuO-CeO_2的催化活性与其CuO的还原性之间有较好的对应关系。A series of CuO-CeO_2 catalysts were prepared by solid-state chemical reaction and characterized by X-ray diffraction（XRD）,temperature-programmed reduction with hydrogen（H_2-TPR） and N_2 adsorption-desorption techniques.Their catalytic performances for low temperature oxidation of CO were evaluated by using a microreactor-GC system.The effects of CuO content and catalyst calcination temperature on the performance of the CuO-CeO_2 catalysts were investigated.The results show that the catalytic activity of the prepared CuO-CeO_2 is increased with CuO content and remains constant when CuO content is not less than 15%.On the other hand,the CO conversion first increases with calcination temperature,and then decreases,with a maximum at 650℃.The catalytic activity of CuO-CeO_2 for CO oxidation is well correlated with the reducibility of CuO.

关 键 词：固相化学反应 CuO-CeO2催化剂 CO低温氧化 

分 类 号：O643.3[理学—物理化学]