Steering Hole Transfer from the Light Absorber to Oxygen Evolution Sites for Photocatalytic Overall Water Splitting

Abstract Harvesting solar energy to realize water splitting into H 2 and O in 2:1 stoichiometric without using any sacrificial agents external bias confronts a big challenge. Herein, the authors demonstrate that engineering hole transfer kinetic by embedding reduced graphene oxide (rGO) interface of light absorber (2D carbon nitride, 2D g‐CN) oxygen evolution cocatalysts ( M x , = Fe, Co, Ni) can both tune extraction rate performance. As result breaking rate‐determining step (i.e., reaction) overall splitting, optimal Pt/2D g‐CN/rGO‐FeO photocatalyst evolve pure with rates 14.07 7.03 µmol h −1 respectively, showing roughly higher gas also excellent stability compared photocatalysts transport engineering. This work reveals feasibility tuning dynamic affords versatile strategy for designing cocatalyst/photocatalyst systems efficient photocatalysis.