Efficient photocatalytic synthesis of H 2 O 2 coupled with 3,4-dihydroisoquinoline by rGO-modified CdS catalysts

The sluggish water oxidation kinetics limit photocatalytic H₂O₂ production. We overcome this by coupling two-electron oxygen reduction (2e^- ORR) with selective 1,2,3,4-tetrahydroisoquinoline (THIQ) oxidation over an rGO-CdS photocatalyst, achieving efficient coproduction of H₂O₂ and 3,4-dihydroisoquinoline (DHIQ). This cooperative photoredox strategy enables sustainable synthesis of value-added chemicals.