Graphene film-confined molybdenum sulfide nanoparticles: Facile one-step electrodeposition preparation and application as a highly active hydrogen evolution reaction electrocatalyst

•We demonstrate the first one-step fabrication of graphene film-confined MoSx nanoparticles.•Such hybrid film is used as a novel HER electrocatalyst in acidic solution.•Such hybrid film shows high HER activity and good stability.

MoSx nanoparticles–graphene hybrid film was deposited onto a glassy carbon electrode by a facile one-step electrodeposition approach using MoS42− and graphene oxide as precursors. As a novel hydrogen evolution reaction (HER) electrocatalyst, this hybrid film exhibits highly catalytic activity and good stability.