文献类型：期刊文献

英文题名：Dependency of CO2 methanation on the strong metal-support interaction for supported Ni/CeO2 catalysts

作者：Pu, Tiancheng[1,2];Chen, Jiacheng[1];Tu, Weifeng[3];Xu, Jing[1];Han, Yi-Fan[1];Wachs, Israel E.[2];Zhu, Minghui[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Lehigh Univ, Dept Chem & Biomol Engn, Operando Mol Spect & Catalysis Lab, Bethlehem, PA 18015 USA;[3]Zhengzhou Univ, Minist Educ, Engn Res Ctr Adv Funct Mat Mfg, Zhengzhou 450001, Peoples R China

年份：2022

卷号：413

起止页码：821

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20223212554423);WOS:【SCI-EXPANDED(收录号:WOS:000865315500005)】；

基金：This work is sponsored by the National Key R&D Program of China (2018YFB0604501) , National Natural Science Foundation of China (22078089) , Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and Shanghai Sailing Program (19YF1410600) . The research at Lehigh University was sup-ported by the Center for Understanding & Con-trol of Acid Gas-Induced Evolution of Materials for Energy (UNCAGE-ME) , an Energy Frontier Research Center funded by DOE, Office of Science, Office of Basic Energy Sciences under grant DE-SC0012577.

语种：英文

外文关键词：Strong metal-support interaction; Ceria; CO2 methanation; Nickel catalyst

摘要：The strong metal-support interaction (SMSI) for supported Ni/CeO2 catalysts with different CeO2 nanomorphologies was systematically explored. The degree of encapsulation of Ni particles originating from the SMSI effect was found to follow the trend of Ni/CeO2-(1 1 1) > Ni/CeO2-(1 0 0) > Ni/CeO2- (110 + 100), which parallels the CO2 hydrogenation activity. Quasi in situ XPS reveals the presence of Ce3+ sites in accordance with the formation of an amorphous surface CeOx layer encapsulating the Ni nanoparticles. In situ DRIFTS indicates the reaction pathway and rate-determining step are dependent on the degree of the SMSI effect, leading to distinct selectivities towards CH4, especially at a high weight hourly space velocity (WHSV). These findings present a fundamental strategy about tailoring catalytic performance through support facet dependent susceptibility of SMSI phenomena. (C) 2022 Published by Elsevier Inc.