Heterostructured CoP/MoO2 on Mo foil as high-efficiency electrocatalysts for the hydrogen evolution reaction in both acidic and alkaline media

The dual-phase synergy between CoP and MoO₂ and the modulated electronic structure induced by heterointerfacial charge redistribution lead to enhanced H₂O dissociation and optimized H-adsorption free energy, accelerating the HER in alkaline and acidic solutions.