In Situ Fabrication of Robust Cocatalyst‐Free CdS/g‐C₃N₄ 2D–2D Step‐Scheme Heterojunctions for Highly Active H₂ Evolution

Efficient H 2 O splitting for H 2 evolution over the semiconductor photocatalyst is a crucial strategy in the field of energy and environment. Herein, cocatalyst‐free 2D–2D CdS/g‐C 3 N 4 step‐scheme (S‐scheme) heterojunction photocatalysts are fabricated through in situ hydrothermal growth of 2D CdS nanosheets (NSs) on 2D g‐C 3 N 4 NSs. The results clearly confirm that the binary CdS/0.7g‐C 3 N 4 S‐scheme heterojunction shows the best H 2...