文献类型：期刊文献

英文题名：Revealing pretreatment-induced structure evolution of LaFeO 3 supported Au catalyst for CO oxidation reaction

作者：Jiang, Yongjun[1,2];Zou, Lian[3];Zhang, Haiyan[3];Tang, Xuan[1,2];Zhou, Lihui[1,2];Tian, Chengcheng[3,4];Dai, Sheng[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2024

卷号：57

外文期刊名：NANO TODAY

收录：;EI(收录号：20242516264588);WOS:【SCI-EXPANDED(收录号:WOS:001257168400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China [grant numbers 22376062 and 52170109] , Science and Technology Commission of Shanghai Municipality [grant number 22ZR1415700] , Shanghai Rising -star Program [grant number 20QA1402400] , Shanghai Science and technology Innovation Plan [grant number 22DZ1208600] , Innovation Program of Shanghai Municipal Education Commission [grant number 2023ZKZD41] , and the Fundamental Research Funds for the Central Universities. Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center at East China University of Science and Technology.

语种：英文

外文关键词：Heterogeneous Catalysts; Pretreatment; Perovskite oxide support; Strong metal-support interaction; CO oxidation; in situ TEM

摘要：Heterogeneous catalysts play a pivotal role in the chemical industry. Pretreatments in reducing or oxidizing atmospheres have been widely utilized to alter the structure of heterogeneous catalysts, with the aim of enhancing their catalytic performance. However, the pretreatment atmosphere can, at times, trigger unexpected structural changes in catalysts and even lead to catalytic degradation. Hence, the selection of an appropriate pretreatment atmosphere for heterogeneous catalysts is critical and requires a clear understanding of their corresponding dynamic evolution to improve their performance in a targeted manner, particularly relying on in situ observation. In this study, a promising CO oxidation catalyst, LaFeO 3 supported Au nanoparticles (Au/LFO) is selected, and the influence of the pretreatments in different atmospheres on Au/LFO is explored by using in situ transmission electron microscopy (TEM) and density functional theory (DFT) calculation. Our findings reveal that the commonly used reducing pretreatment for noble -metal catalysts triggered strong metal -support interactions in Au/LFO, suppressing its CO adsorption performance. In contrast, the oxidizing pretreatment preserves the metallic Au and the metal/support interface as efficient active sites to promote CO oxidation activity and stability simultaneously. This work discloses the structure evolution at the interface between noble metals and perovskite oxide supports in response to different gas phase treatments and clarifies their structure -property relationships.