Deep insight of the influence of Cu valence states in co-catalyst on CO2 photoreduction

被引：36
|
作者：
Deng, Zesheng [1 ,2 ,3 ]
Hu, Songchang [1 ,2 ,3 ]
Ji, Jiahui [1 ,2 ,3 ]
Wu, Shiqun [1 ,2 ,3 ]
Xie, Haijiao [4 ]
Xing, Mingyang [1 ,2 ,3 ]
Zhang, Jinlong [1 ,2 ,3 ]
机构：
[1] East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat,Inst Fine Chem,Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China
[2] East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Joint Int Res Lab Precis Chem & Mol Engn,Inst Fine, 130 Meilong Rd, Shanghai 200237, Peoples R China
[3] East China Univ Sci & Technol, Shanghai Engn Res Ctr Multimedia Environm Catalysi, 130 Meilong Rd, Shanghai 200237, Peoples R China
[4] Hangzhou Yanqu Informat Technol Co Ltd, Y2,2nd Floor,Bldg 2, Xixi Legu Creat Pioneering Pk, Hangzhou 310003, Zhejiang, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 316卷
基金：
中国国家自然科学基金;
关键词：
CO2; photoreduction; Production selectivity; Cu valence state; CO desorption; RAY PHOTOELECTRON-SPECTROSCOPY; PHOTOCATALYTIC REDUCTION; CONVERSION; DEFECTS;
D O I：
10.1016/j.apcatb.2022.121621
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cu is widely used to prepare high-value products in photocatalytic CO(2 )reduction reaction (CO2PR). The valence state of transition metals usually has a great impact on the catalytic process. However, the research on Cu valence in CO2PR is lack for its complex valence change. In current work, Cux/P25 with stable Cu valence composition in CO2PR is prepared. The results show that Cu is composed of Cu-0 and Cu2O, and their proportions change regularly as Cu loading changing, which are linearly related to the selectivity of the corresponding products of CO2PR. Combined with thermodynamic and kinetic analysis, the CO adsorption and activation on the surface of Cu-0 and Cu2O are considered to be the key to determine the product of CO2PR, which is further confirmed by DFT calculation. Cu0 and Cu2O are proved to be active site of producing CH4 and CO, respectively. In this case, a reference for the study of highly selectivity Cu based photocatalysts is provided.
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页数：10
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