Constructing 3D interweaved MXene/graphitic carbon nitride nanosheets/graphene nanoarchitectures for promoted electrocatalytic hydrogen evolution  

作　　者：Haiyan He Yuxian Chen Cuizhen Yang Lu Yang Quanguo Jiang Huajie Huang 

机构地区：[1]College of Mechanics and Materials,Hohai University,Nanjing 210098,Jiangsu,China [2]Institute of Ocean and Offshore Engineering,Hohai University,Nantong 226300,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2022年第4期483-491,共9页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(51802077);the Fundamental Research Funds for the Central Universities(B200202129 and B210202093);the Nantong Science and Technology Bureau(JC2019086 and JC2019003)。

摘　　要：The technique of electrocatalytic hydrogen evolution reaction (HER) represents a development trend of clean energy generation and conversion,while the electrode catalysts are bound to be the core unit in the electrochemical HER system.Herein,we demonstrate a bottom-up approach to the construction of three-dimensional (3D) interconnected ternary nanoarchitecture originated from Ti_(3)C_(2)T_(x)MXene,graphitic carbon nitride nanosheets and graphene (MX/CN/RGO) through a convenient co-assembly process.By virtue of the 3D porous frameworks with ultrathin walls,large specific surface areas,optimized electronic structures,high electric conductivity,the resulting MX/CN/RGO nanoarchitecture expresses an exceptional HER performance with a low onset potential of only 38 m V,a small Tafel slop of 76 m V dec^(-1) as well as long lifespan,all of which are more competitive than those of the bare Ti_(3)C_(2)T_(x),g-C_(3)N_(4),graphene as well as binary MX/RGO and CN/RGO electrocatalysts.Theoretical simulations further verify that the ternary MX/CN/RGO nanoarchitecture with ameliorative band structure is able to facilitate the electron transport and meanwhile offer multistage catalytically active sites,thereby guaranteeing rapid HER kinetics during the electrocatalytic process.

关 键 词：MXene Carbon nitride GRAPHENE ELECTROCATALYSTS Hydrogen evolution 

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