Rational design of noble-metal-free cocatalysts for balanced H ₂ adsorption–desorption and accelerated charge separation toward efficient light-driven hydrogen production

A hierarchical Ni 2 P nanosheet array–graphene composite cocatalyst prepared via low-temperature phosphorization achieves a high photocatalytic hydrogen evolution rate of 20035 µmol g −1 h −1 with eosin Y as the photosensitizer.