On‐Demand Synthesis of H₂O₂ by Water Oxidation for Sustainable Resource Production and Organic Pollutant Degradation

Abstract

H₂ O₂ is a versatile and environmentally friendly chemical involved in water treatment, such as advanced oxidation processes. Anthraquinone oxidation is widely used for large-scale production of H₂ O₂ , which requires significant energy input and periodic replacement of the carrier molecule. H₂ O₂ production should be customized considering the specific usage scenario. Electrochemical synthesis of H₂ O₂ can be adopted as alternatives to traditional method, which avoids concentration, transportation, and storage processes. Herein, we identified Bi₂ WO₆ :Mo as a low-cost and high-selectivity choice from a series of Bi-based oxides for H₂ O₂ generation via two-electron water oxidation reaction. It can continuously provide H₂ O₂ for in situ degradation of persistent pollutants in aqueous solution. Clean energy from H₂ can also be produced at the cathode. This kind of water splitting producing sustainable resources of H₂ O₂ and H₂ is an advance in environmental treatment and energy science.