文献类型：期刊文献

英文题名：Effect of TiO2 crystal structure on the catalytic performance of Co3O4/TiO2 catalyst for low-temperature CO oxidation

作者：Li, Jie[1,2];Lu, Guanzhong[1,2];Wu, Guisheng[3];Mao, Dongsen[3];Guo, Yanglong[1,2];Wang, Yanqin[1,2];Yun Guoa[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：2014

卷号：4

期号：5

起止页码：1268

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20141617584784);WOS:【SCI-EXPANDED(收录号:WOS:000335893200009)】；

基金：This project was financially supported by National Natural Science Foundation of China (21273150), the National Basic Research Program of China (2010CB732300, 2013CB933201), the national high technology research and development program of China (2011AA03A406, 2012AA062703), the Fundamental Research Funds for the Central Universities, the "ShuGuang" Project (10GG23) of Shanghai Municipal Education Commission.

语种：英文

外文关键词：Catalyst supports - Catalytic oxidation - Oxide minerals - Temperature - Electron spin resonance spectroscopy - Crystal structure - Gas adsorption - Precipitation (chemical) - Catalyst activity

摘要：Co3O4 catalysts supported on TiO2 with different crystalline structures (anatase (A), rutile (R) and P25 (Degussa)) were prepared by a deposition-precipitation method, and characterized by nitrogen adsorption/desorption, XRD, HR-TEM, EPR, Raman spectroscopy, XPS and H-2-TPR techniques. The results show that Co3O4/TiO2 (A) exhibited the highest activity among the three Co3O4/TiO2 catalysts: CO can be completely oxidized to CO2 at -43 degrees C. When rutile TiO2 or P25 were used as the support, its catalytic activity was decreased obviously, because the TiO2 crystal structure has an influence on the physicochemical and catalytic properties of the Co3O4 catalysts. The results show that the Co3O4/TiO2 (A) catalyst contains Ti3+ species, which is in an unstable state and can affect the properties of Co3O4 by the interaction between the deposited Co3O4 and anatase TiO2 support. The Co3O4/TiO2 (A) catalyst exhibits highly defective structure and good oxygen adsorption ability. The reducibility of Co3O4 is improved by the anatase TiO2 support, resulting in Co3O4/TiO2 (A) possessing the better redox property than the other Co3O4/TiO2 catalysts, which is an important factor for its high catalytic activity.