Bifunctional core–shell co-catalyst for boosting photocatalytic CO_(2) reduction to CH_(4)  

作　　者：Fangxu Dai Mingming Zhang Jishu Han Zhenjiang Li Shouhua Feng Jun Xing Lei Wang 

机构地区：[1]Key Laboratory of Eco-chemical Engineering,Ministry of Education,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [3]College of Environment and Safety Engineering,Qingdao University of Science and Technology,Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection,Qingdao 266042,China

出　　处：《Nano Research》2024年第3期1259-1266,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51802171,52072197,and 52003136);the Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14);the Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004);the Major Scientific and Technological Innovation Project(No.2019JZZY020405);Taishan Scholar Program,and the Major Basic Research Program of Natural Science Foundation of Shandong Province(No.ZR2020ZD09).

摘　　要：Solar-light-driven CO_(2) reduction CO to CH_(4) and C2H6 is a complex process involving multiple elementary reactions and energy barriers.Therefore,achieving high CH_(4) activity and selectivity remains a significant challenge.Here,we integrate bifunctional Cu2O and Cu-MOF(MOF=metal-organic framework)core–shell co-catalysts(Cu2O@Cu-MOF)with semiconductor TiO_(2).Experiments and theoretical calculations demonstrate that Cu2O(Cu+facilitates charge separation)and Cu-MOF(Cu2+improves the CO_(2) adsorption and activation)in the core–shell structure have a synergistic effect on photocatalytic CO_(2) reduction,reducing the formation barrier of the key intermediate*COOH and*CHO.The photocatalyst exhibits high CH_(4) yield(366.0μmol·g^(-1)·h^(-1)),efficient electron transfer(3283μmol·g^(-1)·h^(-1))and hydrocarbon selectivity(95.5%),which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO_(2) reduction reaction.This work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.

关 键 词：BIFUNCTIONAL CO-CATALYST core–shell PHOTOCATALYTIC CO_(2)reduction 

分 类 号：O64[理学—物理化学]