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 Ti3C2Tx MXene,graphi-tic 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 excep-tional HER performance with a low onset potential of only 38 mV,a small Tafel slop of 76 mV dec 1 as well as long lifespan,all of which are more competitive than those of the bare Ti3C2Tx,g-C3N4,gra-phene 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 elec-tron transport and meanwhile offer multistage catalytically active sites,thereby guaranteeing rapid HER kinetics during the electrocatalytic process.

Haiyan He;Yuxian Chen;Cuizhen Yang;Lu Yang;Quanguo Jiang;Huajie Huang

College of Mechanics and Materials,Hohai University,Nanjing 210098,Jiangsu,China;Institute of Ocean and Offshore Engineering,Hohai University,Nantong 226300,Jiangsu,China

能源化学

[1]Haiyan He;Yuxian Chen;Cuizhen Yang;Lu Yang;Quanguo Jiang;Huajie Huang-.Constructing 3D interweaved MXene/graphitic carbon nitride nanosheets/graphene nanoarchitectures for promoted electrocatalytic hydrogen evolution)[J].能源化学,2022(04):483-491

interweaved,nanoarchitectures,graphi

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