Bioinspired Quinone Redox Cycling Enables Highly Selective Photocatalytic Hydrogen Peroxide Production via Electron–Proton Relay

production. Notably, DB-TABQ achieves a solar-to-chemical conversion efficiency of 1.34% under simulated solar irradiation. Embedding redox relays into conjugated polymer frameworks offers a general design principle to regulate electron-proton coupling and selectivity in solar-to-chemical conversion.