Vacancy‐Activated B‐Doping for Efficient 2e− Oxygen Reduction through Suppressing H2O2 Decomposition at High Overpotential

The production of hydrogen peroxide (H₂O₂) through two-electron oxygen reduction reaction (2e^- ORR) has emerged as a more environmentally friendly alternative to the traditional anthraquinone method. Although oxidized carbon catalysts have intensive developed due to their high selectivity and activity, the yield and conversion rate of H₂O₂ under high overpotential still limited. The produced H₂O₂ was rapidly consumed by the increased intensity of H₂O₂ reduction, which could ascribe to decomposition of peroxide radicals under high voltage in the carbon catalyst. To overcome this issue, a B doped carbon have been developed to catalyze 2e^- ORR with high efficient through suppressing H₂O₂ decomposition at high potential. Thus, thermal reducing of oxygen containing groups (OCGs) on graphite could construct defects and vacancies, which in situ convert to B-C_x subunits on the edge of graphene sheets. The introduction of B-C_x effectively prevented the decomposition of the *O-O bond and provided suitable adsorption capacity for *OOH, achieving excellent selectivity for the 2e^- ORR across a wide voltage range. Finally, a remarkable H₂O₂ yield of 7.91 mmol cm^-2 h^-1 was delivered at an industrial current density of 600 mA cm^-2, which could provide "green" pathway for scale-upable synthesis H₂O₂.