Carbon Doping Triggered Efficient Electrochemical Hydrogen Evolution of Cross‐Linked Porous <scp> Ru‐MoO ₂ </scp> Via Solid‐Phase Reaction Strategy

The defect-free structure of Mo-based materials is a “double-edged sword”, which endows the material with excellent stability, but limits its chemical versatility and application in electrochemical hydrogen evolution reaction (HER). Carbon doping engineering an attractive strategy to effectively improve performance catalyst maintain their stability. Herein, we report cross-linked porous carbon-doped MoO2 (C–MoO2)-based Ru/C–MoO2 for HER, prepared by convenient redox solid-phase (SPR) RuO2/Mo2C composite precursor. Theoretical studies reveal that due presence carbon atoms, electronic C–MoO2 has been properly adjusted, loaded small Ru nanoparticles provide fast water dissociation rate moderate H adsorption strength. In under pH-universal environment, electrocatalyst exhibits low overpotential at current density 10 mA cm−2 Tafel slope. Meanwhile, Ru/C-MoO2 stability more than 100 h initial cm−2.