Efficient H 2 O 2 Production through a Dual-Channel Pathway on a Novel Organic–Inorganic Hybrid Piezocatalyst

Piezocatalysis is a promising and ecofriendly technology for hydrogen peroxide (H 2 O 2 ) synthesis, yet its efficiency is hindered by limited active sites and poor electron–hole utilization. Herein, guided by theoretical calculations, a novel organic–inorganic hybrid piezocatalyst with abundant active sites and full utilization of electron–holes was rationally designed for the overall synthesis of H 2 O 2 . Results illustrated that the organic component (cobalt phthalocyanine, CoPc) switched the H 2 O 2 synthesis of the inorganic component (BiOIO 3, BIO) from a single-channel two-electron water oxidation reaction (2e – WOR) to an efficient dual-channel pathway. Specifically, Co metal centers boosted the O 2 adsorption and activation by coupling with O 2p orbitals, enabling 2e – oxygen reduction reaction. Additionally, CoPc hybridization increased the piezoresponse, further facilitating 2e – WOR on BIO. The optimal sample achieved an exceptional H 2 O 2 yield of 751.2 μmol g –1 h –1 in pure water/air and exhibited excellent degradation of refractory micropollutants. Our work introduces a novel strategy for efficient H 2 O 2 synthesis and facilitates the advancement of sustainable water purification technologies.