Improvement of charge-transfer kinetics via MXene and cobalt containing polyoxometalate loading on CdS for photocatalytic hydrogen production  

作　　者：Yu Feng Xiao Fang Jinnuo Zang Bin Song Chunlian Hu Xiaoyu Dong Yong Ding 

机构地区：[1]State Key Laboratory of Applied Organic Chemistry,Key Laboratory of Advanced Catalysis of Gansu Province,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China [2]State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization,State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Science China Chemistry》2025年第2期772-780,共9页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22075119,22472071);the Natural Science Foundation of Gansu Province(21JR7RA440);the Fundamental Research Funds for the Central Universities(lzujbky-2024-it05,lzujbky2024-it49).

摘　　要：Hydrogen is a renewable and clean energy,and photocatalytic water splitting for hydrogen evolution technology is a promising technical means to solve the development problem.In this study,the ternary composite Co_(8)POM@MXene–CdS hybrid catalyst was constructed and used for photocatalytic hydrogen production.Under the condition of AM 1.5G simulated sunlight,the photocatalytic H_(2) evolution rate of the ternary composite was 8.13 mmol g^(−1) h^(−1),which was more than 25 times higher than that of the bare CdS.By means of synchronous illumination X-ray photoelectron spectroscopy(SI-XPS)and density functional theory(DFT)calculations,it was proved that the loading of MXene and Co_(8)POM improved the photogenerated carrier separation and immigration efficiency on CdS.The photogenerated electrons transfer from CdS to MXene.Co_(8)POM containing the{Co_(4)O_(3)}quasi-cubane,as an oxidation co-catalyst,accepts photogenerated holes from CdS to catalyze the oxidation reaction of TEOA,which improves the photocatalytic hydrogen production activity and the stability of CdS.

关 键 词：CDS POLYOXOMETALATES MXene hybrid catalyst photocatalytic hydrogen evolution 

分 类 号：O64[理学—物理化学]