Vanadium carbide: an efficient, robust, and versatile cocatalyst for photocatalytic hydrogen evolution under visible light.

Herein, we report that vanadium carbide (VC) can efficiently catalyze photocatalytic H-2 evolution with excellent stability in a dye-sensitized system under visible light irradiation (Z420 nm) and also serve as an versatile H-2 evolution cocatalyst when integrated with various semiconductor photocatalysts.