Electrochemical promotion of Pt nanoparticles dispersed on a diamond-like carbon matrix: A novel electrocatalytic system for H2 production.

Highlights: [•] The cathodic arc deposition technique led to a stable nanocomposite multilayer Pt-DLC thin film. [•] Pt nanoparticles can be dispersed on a DLC matrix for electrocatalytic applications. [•] The Pt nanoparticles could be electrochemically promoted by K+ ions for H2 production. [•] The Pt-DLC catalyst film is highly active and stable for the NEMCA experiments. [Copyright &y& Elsevier]