Self-assembly of bimetallic polyoxometalates and dicyandiamide to form Co/WC@NC for efficient electrochemical hydrogen generation

Graphene carbon-coated and N-doped WC and cobalt (Co) nanoparticles (Co/WC@NC) were synthesized via a one-step straightforward high-temperature calcination. The resultant Co/WC@NC manifests excellent hydrogen evolution activity.