Covalent organic frameworks for direct photosynthesis of hydrogen peroxide from water, air and sunlight Abstract Solar-driven photosynthesis is a sustainable process for the production of hydrogen peroxide, the efficiency of which is plagued by side reactions. Metal-free covalent organic frameworks (COFs) that can form suitable intermediates and inhibit side reactions show great promise to photo-synthesize H 2 O 2 . However, the insufficient formation and separation/transfer of photogenerated c...