| 초록 |
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have been considered as promising candidates for HER because of their atomically-thin structure, large specific surface area, and low free energy of hydrogen absorption. However, TMDCs remain unsatisfactory due to several issues including the low active basal plane, poor charge transfer, and low availability of edge sites. Recently, catalysts with heterostructure have demonstrated extraordinary electrocatalytic performance toward HER arising from their enhanced electrical conductivity, enhanced HER kinetics, fast mass diffusion, and electron transfer. In this study, a novel 2D/2D core-shell hierarchical structure between metal sulfide and metal dichalcogenide was constructed on carbon cloth by a facile hydrothermal method. Compared with pure ReS2, NiCo2S4@ReS2 not only increases the electrochemical surface area but also improves the intrinsic activity of active sites of HER. This study provides a facile approach to rationally design cost-efficient and highly catalytic heterostructure systems as HER catalysts for electrochemical energy conversion. |
