Cu-clusters nodes of 2D metal-organic frameworks as a cost-effective noble-metal-free cocatalyst with high atom-utilization efficiency for efficient photocatalytic hydrogen evolution  

作　　者：Guangmei Jiang Xingyan Liu Huilong Jian Peng Lu Jinwu Bai Guizhi Zhang Wen Yun Siqi Li Youzhou He 

机构地区：[1]Chongqing Key Laboratory of Catalysis and New Environmental Materials,College of Environment and Resources,Chongqing Technology and Business University,Chongqing 400067,China [2]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Chemical Letters》2022年第6期3049-3052,共4页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21502012,22001026);the Youth Project of Science and Technology Research Program of Chongqing Education Commission of China(Nos.KJQN201900838,KJQN201800836,KJQN201900842);the Chongqing Science and Technology Commission(Nos.cstc2018jcyj AX0531,cstc2017jcyj AX0404,cstc2020jcyjmsxm X0830);Student Science and Technology Innovation Fund Project of Chongqing Technology and Business University(No.20328)。

摘　　要：Several 2D nanosheets of porphyrin MOFs with various transition-metal clusters as metal nodes were prepared via a simple solvothermal method to apply in the photocatalytic hydrogen evolution,in which the hydrogen production rate of the optimal NS-Cu was as high as 15.39 mmol g^(-1)h^(-1).A series of experimental technologies especially cyclic voltammetry(CV)and Mott-Schottky(M-S)had been adopted to investigate the charge-transfer property of photo-generated electron-hole pairs,it was found that the uniformly dispersed Cu-clusters nodes in the original 2D MOFs played a key role in the electron transfer process,that was,the photo-generated electron transferred from excited state eosin-Y to the Cu-clusters nodes for the efficient hydrogen evolution.The excellent photocatalytic performance could be attributed to the reversible oxidation-–reduction process of Cu^(Ⅱ)/Cu^(Ⅰ),which had excellent electron-receiving and electron-outputting capabilities.Our results provided a novel avenue to adapt the uniformly dispersed metal nodes in the original MOFs as cost-effective noble-metal-free cocatalysts with very high atomutilization efficiency to improve the photocatalytic hydrogen evolution performance in dye-sensitized system.

关 键 词：2D nanosheets Photocatalytic hydrogen production Cu-clusters nodes Cu^(Ⅱ)/Cu^(Ⅰ) COCATALYSTS 

分 类 号：TQ116.2[化学工程—无机化工] TQ426[一般工业技术—材料科学与工程] TB383.1