Sub-2 nm PtRu alloy embedded in carbon nanosheets for enhanced hydrogen evolution in acid and alkaline media

We report a salt-template-assisted pyrolysis strategy to synthesize sub-2 nm PtRu alloy nanoparticles embedded in ultrathin carbon nanosheets. The resulting Pt₂Ru/C catalyst exhibits outstanding hydrogen evolution activity and stability in both acidic and alkaline media, offering a promising route toward high-efficiency electrocatalysts for green hydrogen production.