Cationic engineering of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production.

Efficient O2 capture and charge carrier separation are both essential for photocatalytic H2O2 production, yet simultaneously optimizing these processes remains challenging. Herein, we engineer a cationic microenvironment within a covalent organic framework to synergistically enhance O2 adsorption and directional charge migration, resulting in a three-fold enhancement in H2O2 yield compared to the non-ionic counterpart.