Construction of Schottky Junction Between Metallic-Like CoCeOx and CdS for Stable Photocatalytic Hydrogen Production Performance

This Schottky junction establishes an interfacial built-in electric field, offering a powerful driving force for the separation and transport of photogenerated carriers. Specifically, under light excitation, the electrons generated by CdS can be rapidly and directionally transferred through the metal-like channels of CoCeOx, while the holes remain in the valence band of CdS, achieving effective spatial separation of electrons and holes, significantly inhibiting the loss of carrier recombination.

Meanwhile, the intimate and robust interface between CoCeOx and CdS facilitates efficient charge transfer and simultaneously improves the structural durability of the hybrid catalyst under long-term photocatalytic conditions. Experimental results showed that the optimized CdS/CoCeOx composite material exhibited significantly improved hydrogen production rate and excellent cycling stability in the photocatalytic water decomposition hydrogen production reaction, with no significant performance decline in multiple hydrogen production tests.