文献类型：期刊文献

英文题名：Promotional role of ceria on cobaltosic oxide catalyst for low-temperature CO oxidation

作者：Li, Jie[1,2];Lu, Guanzhong[1,2,3];Wu, Guisheng[3];Mao, Dongsen[3];Wang, Yanqin[1,2];Guo, Yun[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[3]Shanghai Inst Technol, Res Inst Appl Catalysis, Shanghai 200235, Peoples R China

年份：2012

卷号：2

期号：9

起止页码：1865

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20123315335021);WOS:【SCI-EXPANDED(收录号:WOS:000307188100018)】；

基金：This project was financially supported by the National Basic Research Program of China (2010CB732300), the Fundamental Research Funds for the Central Universities, the "Shu Guang" Project (10GG23) and Leading Academic Discipline Project (J51503) of Shanghai Municipal Education Commission and Shanghai Education Development Foundation.

语种：英文

外文关键词：Catalytic oxidation - Transient analysis - Oxygen vacancies - Carbon dioxide - Temperature - Catalyst activity - Desorption

摘要：Ceria modified Co3O4 catalysts for low temperature CO oxidation were prepared by a precipitation-oxidation method, and characterized by low-temperature N-2 adsorption/desorption, TPR, O-2-TPD, CO-TPD and transient-response reaction. The roles of ceria in CeO2-Co3O4 catalyst and the effect of pretreatment on the performance of CeO2-Co3O4 for CO oxidation were investigated in detail. The results show that the presence of CeO2 can increase its surface area, reduce the crystal size of Co3O4, and improve obviously the catalytic activity and stability of Co3O4 for CO oxidation, such as its T-100 is only -60 degrees C. It was also found that the addition of CeO2 can not only promote the adsorption of O-2 and the reaction of adsorbed CO with surface oxygen species to form CO2, but also increase the CO2 desorption speed. The pretreatment method can affect the catalytic activity of CeO2-Co3O4, the catalyst treated in N-2 exhibits higher catalytic activity for low-temperature CO oxidation due to formation of oxygen vacancy. The catalyst reduced in H-2 shows lower activity for CO oxidation although it has more surface oxygen vacancies, because of the difficult desorption of CO2 on the reduced CeO2-Co3O4 catalyst.