Researchers at the S. N. Bose National Centre for Basic Sciences in Kolkata, India, have developed an innovative method to synthesize hydrogen peroxide (H2O2) using hydrazone-linked COFs under sunlight. Hydrogen peroxide is a crucial chemical used in disinfection, paper bleaching, and various other industries. The team's approach focused on designing COFs with good water affinity to enhance the photocatalytic performance for H2O2 generation. By utilizing hydrazone-linked COFs, the researchers were able to promote water oxidation and oxygen reduction reactions, leading to exceptional H2O2 production without the need for external sacrificial electron donors. The method also demonstrated significant H2O2 production under sunlight, outperforming many organic photocatalysts. This sustainable approach not only offers an environmentally friendly way to produce H2O2 but also prevents its degradation. The researchers believe that the use of a water-benzyl alcohol solution could facilitate the development of a continuous flow reactor for sustainable H2O2 production, showcasing the potential for a laboratory-to-industry technology transfer.