Efficient photocatalytic H2O2 production and green oxidation of glycerol over a SrCoO3-incorporated catalyst

Photocatalysis for H 2 O 2 production suffers from low carrier utilization and slow reaction kinetics. Herein, a photocatalytic system supported by a SrCoO 3 -MoS 2 (SCOS) heterojunction, which possessed a unique S-O electron transport channel, was proposed to facilitate H 2 O 2 production under condition where glycerol served as a sacrificial agent. The SCOS heterojunction achieved a remarkable yield of 15.90 mmol g −1 h −1 H 2 O 2 production, 3.7 times higher than the base component SCO. The construction of the heterojunction enriched the oxygen vacancies on the catalyst surface, facilitated photogenerated charge separation, and promoted the adsorption of O 2 , reducing the oxygen reduction reaction (ORR) energy barrier. Besides, glycerol served as a unique proton donor, efficiently captured holes to enhance H 2 O 2 production, and generated valuable by-products including glyceric acid and dihydroxyacetone. Furthermore, SCOS exhibited excellent stability over repeated cycles with consistent H 2 O 2 yields. This study offers an efficient photocatalytic system and demonstrates glycerol’s potential in green oxidation processes.