Proton Reservoir in Covalent Organic Framework Compensating Oxygen Reduction Reaction Enhances Hydrogen Peroxide Photosynthesis

Abstract The water oxidation reaction (WOR) with sluggish kinetics usually fails to adequately furnish protons to oxygen reduction reaction (ORR), which ultimately constrains the overall efficiency of photocatalytic synthesis of H 2 O 2 , particularly in the absence of sacrificial agents. Herein, a class of hydroxyl groups (─OH) functionalized covalent organic framework (COF) is reported as a proton reservoir to compensate ORR for greatly improving the efficiency of H 2 O 2 photosynthesis. It has been demonstrated that the incorporation of ─OH into the TFBP‐DHBD (TFBP: 1,2,4,5‐tetrakis‐(4‐formylphenyl)benzene, DHBD: 3,3′‐dihydroxybenzidine) COF can achieve a 3.3 times higher H 2 O 2 photosynthetic activity…

• NN
  National Natural Science Foundation of China

  Awards: 52261135633, 52303363, 22205010
• CP
  China Postdoctoral Science Foundation

  Award: 2024M760123
• NK
  National Key Research and Development Program of China

  Award: 2022YFE0128500
• NS
  National Science Fund for Distinguished Young Scholars

  Award: 52025133