Covalent Organic Frameworks for Photocatalytic Hydrogen Peroxide Generation

Hydrogen peroxide (H 2 O 2 ), a valuable chemical, is widely used as a powerful oxidizing agent in chemical synthesis, pharmaceuticals, medical disinfection, and environmental treatment industries. Currently, over 95% of H 2 O 2 is produced industrially using the anthraquinone process, which is associated with its high energy consumption and hazardous byproducts. Therefore, the photochemical synthesis of H 2 O 2 from water and oxygen using covalent organic framework based photocatalysts have attracted considerable attention. This review aims to outline recent achievements, challenges and future prospects of COFs as heterogeneous photocatalysts for sustainable H 2 O 2 generation. We summarize the chronological development of COFs, different mechanisms involved, and detailed experiments and quantification methods of photocatalytic H 2 O 2 generation. The review puts forward an outlook, highlighting the advantages and limitations of COFs for H 2 O 2 generation. We anticipate that this review will provide insight into current progress and inspire the development of next-generation photocatalysts for sustainable H 2 O 2 production.