Novel assembly of Janus RGO/1 T-SeMoS nanosheets structures showing high-efficient electrocatalytic activity for hydrogen evolution

Abstract Metallic (1 T) transition metal dichalcogenides illustrate excellent electrical and optical properties and so receive considerable attention in hydrogen evolution electrocatalysis application. Janus structure of this class of materials, an intralayer heterojunction, and its anion-deficiency may have dramatically enhanced hydrogen evolution catalytic activity. This work reports a fast and simple method of assembling the RGO/1 T-MoS2 nanosheet heterostructures. The Janus RGO/1 T-SeMoS nanostructures were also assembled by a hydrothermal substitution reaction in se2− anion aqueous solution, whereas the se-deficient Janus structures were assembled by a hydrothermal reaction in water. Synthesized RGO/1 T-MoS2 and RGO/1 T-MoSe2 nanostructures illustrated an excellent electrocatalytic activity of hydrogen evolution. The Janus and Se-deficient Janus RGO/1 T-SeMoS nanostructures further illustrated dramatically enhanced activity. These novel methods are significant for the assembly of Janus 1 T-transition metal dichalcogenides nanostructures