Figure Abstract (IMAGE)

Dalian Institute of Chemical Physics, Chinese Academy Sciences

Figure Abstract

Caption

A hydroquinone-embedded covalent organic framework (Tz-QH-COF) was designed to address photocatalyst instability in solar-driven H₂O₂ production. The hydroquinone units serve as reversible hole reservoirs, buffering the kinetic imbalances between oxygen reduction and water oxidation. This redox-mediated charge balancing prevents oxidative degradation, enabling continuous H₂O₂ production for 528 hours with an 18.6 mM yield—the longest stability  ever reported for organic photocatalysts. In situ ATR-SEIRAS and DFT calculations confirm an efficient hydroquinone/quinone cycle and favorable reaction pathways.

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Chinese Journal of Catalysis

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