Single-atom Cu anchored on N-doped graphene/carbon nitride heterojunction for enhanced photocatalytic H_(2)O_(2) production  

作　　者：Han Li Bicheng Zhu Bei Cheng Guoqiang Luo Jingsan Xu Shaowen Cao 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430078,China [3]School of Chemistry and Physics,Queensland University of Technology,Brisbane,QLD 4000,Australia

出　　处：《Journal of Materials Science & Technology》2023年第30期192-200,共9页材料科学技术（英文版）

基　　金：This work was financially supported by the National Key R&D Program of China(No.2022YFE0114800);the National Natural Science Foundation of China(Grant Nos.51922081,22278324,52073223,and U1905215);the Natural Science Foundation of Hubei Province of China(No.2022CFA001);the Fundamental Research Funds for the Central Universities(Grant No.WUT:2020-YB-010).

摘　　要：Photocatalytic production of H_(2)O_(2) by polymeric carbon nitride has been regarded as a promising ap-proach for the conversion of solar energy into valuable chemicals.However,the efficiency of pristine car-bon nitride is limited by the rapid charge recombination and the lack of suitable active sites.Herein,we introduce single-atom Cu anchored on N-doped graphene(Cu-NG)as a cocatalyst coupled with carbon nitride via covalent bonding to enhance photocatalytic H_(2)O_(2) production.The Cu-NG/carbon nitride could broaden the light absorption from UV to near-infrared region,contributing to the photocatalytic process.Moreover,NG containing electron-rich N atoms could serve as anchoring sites for stabilizing single-atom Cu.Importantly,the single-atom Cu acts not only as an electron sink to steer the interfacial charge sep-aration but also as an active site for molecular oxygen adsorption and activation.With the synergistic effect of the enhanced interfacial charge separation and suitable active sites,Cu-NG/carbon nitride ex-hibits improved photocatalytic performance with an H_(2)O_(2) generation rate of 2856μmol g^(−1)h^(−1),which is 2.6 times that of pristine carbon nitride.This work provides a protocol for high-performance photocat-alytic H_(2)O_(2) production using a single-atom cocatalyst.

关 键 词：Single-atom catalysis Interfacial charge separation Photocatalytic H_(2)O_(2)production 

分 类 号：TM53[电气工程—电器]