文献类型：期刊文献

英文题名：Kinetics insights into the active sites of Au catalysts for the oxidative esterification of methacrolein to methyl methacrylate

作者：Farooq, Muhammad U.[1];Shi, Yao[1];Chen, Wenyao[1];Guan, Yanan[1];Zhou, Jinghong[1];Song, Nan[1];Qian, Gang[1];Zhang, Jing[1];Chen, De[2];Zhou, Xinggui[1];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2023

卷号：277

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20231914076627);WOS:【SCI-EXPANDED(收录号:WOS:001001374300001)】；

基金：This work was financially supported by the National Key R & D Program of China (2022YFA1503503 and 2022YFA1503504) , the Natural Science Foundation of China (22038003, 22178100, 22178101, U22B20141 and 22008066) , the Innovation Program of Shanghai Municipal Education Commission, the Program of Shanghai Academic/Technology Research Leader (21XD1421000) , the Shanghai Science and Technology Innovation Action Plan (22JC1403800) .

语种：英文

外文关键词：Kinetics strategy; Methyl methacrylate; Geometric and electronic effects; Active site; Au catalysts

摘要：The direct oxidative esterification of methacrolein (MAL) has drawn considerable attention as a promising route to produce methyl methacrylate (MMA). Here, we report a kinetics strategy to identify the active sites of Au catalyst for its disentanglement of geometric and electronic effects on this reaction. A series of Al2O3 and CeO2 supported Au catalysts are prepared by urea deposition-precipitation method, whose particle sizes are tailored by changing the vacuum-drying temperature. Their catalytic activity is correlated with Au particle size based on a crystal structure modelling, in which the Au edge site is identified as the main active site. The reduction in the valence electron population of Au 5d states facilitates the adsorption of MAL, thus the positive core-level shift of Au 4f levels for each support gives rise to a higher production of MMA. This kinetics strategy could be extended to the design of other metal catalysts for this reaction.