Noble‐metal‐free Electrocatalysts for Selective Hydrogen Peroxide Generation via Oxygen Reduction Reaction

Hydrogen peroxide (H2O2) is a versatile chemical widely used in various industries. The traditional anthraquinone method for H2O2 synthesis has environmental and safety concerns due to the use of organic solvents and hazardous by‐products. The direct synthesis of H2O2 from H2 and O2 poses risks of flammability and explosion. Recently, the 2‐electron oxygen reduction reaction (2e‐ ORR) method has emerged as a promising alternative, offering safety, environmental friendliness, and cost‐effectiveness. This method utilizes gas diffusion electrodes to efficiently generate H2O2 without the need for additional dilution. In this review, we focus on the recent advancements in noble‐metal‐free materials for 2e‐ ORR electrocatalysis, which play a crucial role in the efficient production of H2O2. These materials, including transition metal compounds, macrocyclic complexes, carbon‐based catalysts, framework materials, and MXene catalyst, demonstrate significant advantages in enhancing H2O2 yield. The development of these non‐precious metal catalysts can reduce costs and improve sustainability and promote the commercialization of related technologies. The review concludes with an outlook on the future trends of 2e‐ ORR electrocatalysts.