Rationally designed CaTiO/MnCdS/NiC S-scheme/Schottky integrated heterojunction for efficient photocatalytic H evolution.

Developing effective photocatalysts to achieve stable and efficient solar-induced hydrogen production remains a significant challenge due to rapid photocarrier recombination and sluggish hydrogen evolution kinetics. Here, a multi-interfacial engineering strategy involving the decoration of metallic NiC onto CaTiO/MnCdS was proposed to create an S-scheme/Schottky hybrid heterostructure with multiple carrier transport paths for effective photocatalytic H production. Exploiting the synergy between S-scheme heterojunction and Schottky barrier, the engineered ternary CaTiO/MnCdS/NiC hybrid heterojunction exhibits outstanding photostability and significantly enhanced hydrogen evolution activity of 79.