CoAl LDH@Ni-MOF-74 S-Scheme Heterojunction for Effi cient Hydrogen Evolution

作     者：Zhiliang Jin Yanbing Li Qingxiang Ma Zhiliang Jin;Yanbing Li;Qingxiang Ma

作者机构：State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical EngineeringNingxia UniversityYinchuan 750021China Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Aff airs CommissionSchool of Chemistry and Chemical EngineeringNorth Minzu UniversityYinchuan 750021China 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2021年第27卷第2期

页      面：127-138页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：This work was financially supported by the Natural Science Foundation of the Ningxia Hui Autonomous Region(No.2020AAC02026) 

主　　题：CoAl LDH Ni-MOF-74 S-scheme heterojunction Hydrogen evolution 

摘      要：Metal–organic frameworks(MOFs)and layered double hydroxides(LDHs)have been considered to be one of the most promising and worthy hot spot materials to develop advanced catalysts for effi cient hydrogen evolution due to their prominent characteristics,including unique structures,environmentally friendly nature,high redox activities,and homogeneously eff ective utilization of transition metal *** this work,the delicate S-scheme heterojunction photocatalyst,CoAl LDH@Ni-MOF-74,was rationally designed and successfully constructed by coupling Ni-MOF-74 with CoAl LDH based on their peculiar structure,excellent electronic properties,and opposite surface potential for enhancing hydrogen generation activity under visible light *** CoAl LDH nanolayers evenly and dispersedly load on the surface of *** CoAl LDH@Ni-MOF-74 exhibited higher photocatalytic hydrogen evolution activity compared with Ni-MOF-74 and CoAl LDH alone,mainly because the formation of the CoAl LDH@Ni-MOF-74 S-scheme heterojunction accelerated the recombination of several electrons(from conduction band(CB)of Ni-MOF-74)and holes(from valence band(VB)of CoAl LDH)and prevented the recombination of other electrons(from CB of CoAl LDH)and holes(from VB of Ni-MOF-74).