文献类型：期刊文献

英文题名：Atomically dispersed Au catalysts supported on CeO2 foam: controllable synthesis and CO oxidation reaction mechanism

作者：Wang, Hao[1];Shen, Jianhua[1];Huang, Jianfei[2];Xu, Tengjing[1];Zhu, Jingrun[1];Zhu, Yihua[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

年份：2017

卷号：9

期号：43

起止页码：16817

外文期刊名：NANOSCALE

收录：;EI(收录号：20174604411908);WOS:【SCI-EXPANDED(收录号:WOS:000414960900034)】；

基金：This work was supported by the National Natural Science Foundation of China (21236003, 21322607, 21406072, 21471056, 21676093, 21776092 and 91534202), the Basic Research Program of Shanghai (15JC1401300), Shanghai Educational Development Foundation (14CG29), the Key Scientific and Technological Program of Shanghai (14521100800), the International Science and Technology Cooperation Program of China (2015DFA51220), and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：Catalyst supports - Precipitation (chemical) - Catalysis - Catalytic oxidation - Catalyst activity - Gold - Temperature

摘要：CO oxidation is a typical heterogeneous catalytic reaction. Development of active and stable low-temperature CO oxidation catalysts has been one of the hot topics in the field of catalysis. In this work, we explored the catalytic application of a series of Au catalysts supported on CeO2 foam using a modified deposition-precipitation method for CO oxidation. Among them, the catalyst with 1.1% Au loading content showed the highest catalytic activity, leading to the CO total conversion at 20 degrees C. Based on the strategy of stepwise reduction of Au loading content, we finally obtained the atomically monodisperse Au/CeO2 catalyst with high stability and strong resistance to elevated temperature, on which in situ DRIFTS analysis and DFT study were further performed to study the possible reactive site. Our results implied that the Au atoms on the CeO2 foam are the more stable sites for CO adsorption on the catalysts.