Metal‐Free Photocatalysts for Conversion of H(2)O into Hydrogen Peroxide

Hydrogen peroxide (H(2)O(2)) is an important green oxidizing agent for environmental protection and chemical production. In comparison to the traditional anthraquinone method, photosynthesis is a green and energy‐saving process for H(2)O(2) production. To improve the stability and practical application value of the H(2)O(2) synthesized by photocatalysis, the H(2)O(2) photosynthesis should be conducted in pure water without involving any sacrificial reagents. In this regard, organic semiconducting catalysts pose as a suitable candidate for photocatalytic H(2)O(2) synthesis owing to their metal‐free nature to prevent H(2)O(2) decomposition by the metal ions. In this Perspective, the H(2)O(2) photosynthesis history is firstly introduced, followed by a review of the organic semiconductor photocatalysts reported to date. Finally, the main problems to thwart the advances of current pure H(2)O‐to‐H(2)O(2) photosynthesis are discussed, followed by proposed solutions to address these issues in order to pave new ways for the development of highly efficient metal‐free organic photocatalysts for sustainable pure H(2)O‐to‐H(2)O(2) conversion.