High alkalinity boosts visible light driven H2 evolution activity of g-C3N4 in aqueous methanol

Abstract

A high rate of 2.23 mmol h⁻¹ g⁻¹ (quantum efficiency of 6.67% at 400 nm) for visible light driven photocatalytic H₂ evolution can be achieved with g-C₃N₄ by alkalization of the solution to a pH of 13.3, due to accelerated transfer of photoholes to the sacrificial donor.