Abstract
Metallic (1T) transition metal dichalcogenides illustrate excellent electrical and optical properties and so receive considerable attention in hydrogen evolution electrocatalysis application. Janus structure of this type of materials and its anion-deficient structures may have dramatically enhanced hydrogen evolution catalytic activity. This work reports a novel method assembling the RGO/1T-MoSe2 nanosheet heterostructures. The Janus RGO/1T-TeMoSe nanostructures were also assembled by a hydrothermal substitution reaction in Te2− anion aqueous solution, whereas the Te-deficient Janus structures were assembled by a hydrothermal reaction in water. Synthesized RGO/1T-MoSe2 and RGO/1Tʹ-MoTe2 nanostructures illustrated a high electrocatalytic activity of hydrogen evolution. The Janus and Te-deficient Janus RGO/1Tʹ-TeMoSe nanostructures further illustrated dramatically enhanced activity. These novel methods are significant for the assembly of Janus 1T-transition metal dichalcogenides nanostructures.
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