文献类型：期刊文献

英文题名：Hydrogenation of CO2 to CH3OH on the Cu-ZnO-SrTiO3 Catalysts: The Electronic Metal-Support Interaction Induces Oxygen Vacancy Generation

作者：Liu, Yaxin[1];Wang, Xuguang[1];Wang, Zihao[1];Chen, Chonghao[1];Song, Jianhua[1];Zhang, Ling[2];Bao, Weizhong[2];Sun, Bin[2];Wang, Lei[2];Liu, Dianhua[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Minist Educ,Engn Res Ctr Large Scale Reactor Engn, Shanghai 200237, Peoples R China;[2]Shanghai Waigaoqiao 3 Power Generat Co Ltd, Shanghai 200137, Peoples R China

年份：2024

卷号：14

期号：16

起止页码：12610

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20243316866846);WOS:【SCI-EXPANDED(收录号:WOS:001286266300001)】；

基金：This work was supported by the Science and Technology Commission of Shanghai Municipality (22dz1208400) and the Fundamental Research Funds for the Central Universities (JKCA1241105).

语种：英文

外文关键词：electron transfer; EMSI; oxygen vacancies; Schottky-Mott junctions; perovskite structure

摘要：With the massive burning of fossil energy sources, the greenhouse effect is increasingly significant, and the reduction of the CO2 concentration in the atmosphere is imminent. In this work, Cu-ZnO-SrTiO3 catalysts with different Cu-Zn loadings and Cu/Zn atomic ratios were prepared by the deposition-coprecipitation method using n-type semiconductor SrTiO3 with a perovskite structure as a support for the CO2 hydrogenation to methanol process. In situ XPS, in situ CO-DRIFTS, electron paramagnetic resonance (EPR), and UV confirmed that electron transfer from the supports to Cu is the intrinsic nature of the electronic metal-support interaction between Cu and the supports, resulting in oxygen vacancy generation. Electron transfer is attributed to the difference in the Fermi energy levels of the metal and the supports, which in turn form Schottky-Mott junctions. EPR, CO2-TPD, and catalytic activity illustrated that oxygen vacancies (O-v) in the supports (SrTiO3 and ZnO) enhance the activation of CO2. H-2-TPD demonstrated that Cu delta- species in contact with the supports facilitate hydrogen spillover. Cu-delta--O-v at the interface may be the active sites of catalysts. In addition, in situ XRD verified that the larger the electron transfer, the smaller the corresponding Cu particle diameter.