Lawrence Berkeley National Laboratory

Hydrogen peroxide (H O ) has exhibited huge application value in many fields including chemical synthesis, medicine, environmental remediation, and fuel cells. Traditional anthraquinone method for H O commercial production has emerged the drawbacks of toxicity, H consumption and high energy input. Photocatalytic production of H O , which only requires water, oxygen, solar light and catalyst, is a novel and green technique, and potentially becomes one of the substitutes for anthraquinone method. Herein, we comprehensively review the research progress in the reported semiconductor catalysts, their modification strategies, as well as the related photocatalysis systems and mechanisms for the light driven H O production. In detail, the photocatalysts are introduced from different families including ZnO, g-C N , TiO , metal complexes, metal sulfides, Bi containing semiconductors, and carbon materials. In the meantime, their modification strategies are systematically evaluated aiming at the improvement in the structures and the photoelectrical properties of semiconductors, as well as their effective activation of molecular O , and inhibition of H O decomposition. Finally, this review is concluded with a brief summary and outlook, and the major challenges for the development of photocatalytic H O production over the emerging semiconductor photocatalysts. 2 2 2 2 2 2 2 2 2 3 4 2 2 2 2 2 2