Nickel and indium core-shell co-catalysts loaded silicon nanowire arrays for efficient photoelectrocatalytic reduction of CO_(2) to formate  

作　　者：Wenchao Ma Mingcan Xie Shunji Xie Longfu Wei Yichen Cai Qinghong Zhang Ye Wang 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,National Engineering Laboratory for Green Chemical Productions of Alcohols,Ethers and Esters,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China

出　　处：《Journal of Energy Chemistry》2021年第3期422-428,共7页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21972115,91945301,21690082 and 21503176);the China Postdoctoral Science Foundation(Nos.2015M570555,2016T90597)。

摘　　要：Developing an efficient artificial photosynthetic system for transforming carbon dioxide and storing solar energy in the form of chemical bonds is one of the greatest challenges in modern chemistry.However,the limited choice of catalysts with wide light absorption range,long-term stability and excellent selectivity for CO_(2) reduction makes the process sluggish.Here,a core-shell-structured nonnoble-metal Ni@In co-catalyst loaded p-type silicon nanowire arrays(SiNWs)for efficient CO_(2) reduction to formate is demonstrated.The formation rate and Faradaic efficiency of formate over the Ni@In/SiNWs catalyst reach 58μmol h^(-1) cm^(-2) and 87% under the irradiation of one simulated sunlight(AM 1.5 G,100 mW cm^(-2)),respectively,which are about 24 and 12 times those over the pristine SiNWs.The enhanced photoelectrocatalytic performance for CO_(2) reduction is attributed to the rational combination of Ni capable of effectively extracting the photogenerated electrons and In responsible for the selective activation of CO_(2).

关 键 词：CO_(2)reduction PHOTOELECTROCATALYSIS Core-shell-structured co-catalyst Silicon nanowire arrays 

分 类 号：TQ225.24[化学工程—有机化工] TQ426[一般工业技术—材料科学与工程] TB383.1