Three-Dimensional Bicarbazole-Based Covalent Organic Frameworks as Efficient Yeager-Type Photocatalysts for H 2 O 2 Generation in a Two-Phase System

Photocatalytic reduction of oxygen to hydrogen peroxide (H2O2) represents an attractive solar-to-chemical conversion pathway. Nevertheless, it remains a significant challenge to achieve efficient H2O2 photosynthesis while simultaneously mitigating photocorrosion of the catalysts owing to the presence of superoxide radicals (•O2–) and the accumulation of photoexcited holes (h+). In the present work, a 1,2,3,4-tetrahydroisoquinoline (THIQ)-water two-phase system was developed to achieve high-efficiency and durable production of H2O2 by suppressing •O2– intermediates and rapidly consuming h+. The •O2–-free direct two-electron oxygen reduction reaction (2e– ORR) to H2O2 was accomplished on special…

• NS
  Natural Science Foundation of Shanghai

  Award: 21ZR1419500
• CU
  City University of Hong Kong

  Awards: 7020089, 9380117
• IA
  Innovation and Technology Fund

  Award: ITS/322/22
• SK
  State Key Laboratory of Supramolecular Structure and Materials

  Award: sklssm202523