Constructing asymmetric covalent organic frameworks to facilitate photocatalytic hydrogen production

Abstract

BTT-Tp-BD-COFs, composed of three kinds of monomers, display non-centrosymmetric molecular structures, resulting in a large dipole moment, reduced exciton binding energy, enhanced charge separation efficiency, and modified surface hydrophilicity. Consequently, the hydrogen evolution rate of the optimized BTT_0.85Tp_0.15BD-COF was significantly improved, reaching 7.62 mmol g⁻¹ h⁻¹.