One-step electrodeposition fabrication of graphene film-confined WS2 nanoparticles with enhanced electrochemical catalytic activity for hydrogen evolution

In this communication, graphene film-confined WS 2 nanoparticles were deposited on conductive substrate by a one-step electrodeposition strategy using (NH 4 ) 2 WS 4 and graphene oxide (GO) as precursors. As a novel hydrogen evolution reaction (HER) electrocatalyst , this hybrid film exhibits highly catalytic activity with low onset overpotential, a small Tafel slope and good stability.