A post-modified donor–acceptor covalent organic framework for enhanced photocatalytic H2 production and high proton transport

The post-synthetic PyBT-COF-COOH exhibits an enhanced photocatalytic hydrogen production rate of 8.15 mmol g −1 h −1 and a notable proton conductivity of 1.5 × 10 −2 S cm −1 upon light irradiation, essentially fulfilling the demands in PEMFCs.