Simultaneous ozone and hydrogen peroxide electrosynthesis via defect modulation in Ni, Sb‐doped SnO2 electrocatalysts

Abstract Electrochemical synthesis of green oxidants O 3 and H 2 O 2 is valuable for applications, but challenges persist in enhancing the O 3 and H 2 O 2 generation activity and combined application. Herein, we modulate the surface Ni active sites and oxygen vacancy defects content in Ni‐Sb‐SnO 2 electrocatalysts to enhance selectivity for electrochemical ozone generation (EOP) and two‐electron electrochemical oxygen reduction reactions (2e − ORR). The Ni active sites and oxygen vacancy defects enriched electrocatalysts resulting in an ozone faradaic efficiency of 48.1%, while non‐enriched electrocatalyst obtained 90% selectivity for H 2 O 2 . Theoretical calculations revealed that Ni‐Sb‐SnO 2 efficiently captures O 2 with defective O vac2 stabilize intermediates, facilitating O 3 and H 2 O 2 synthesis. Moreover, concerted EOP and 2e − ORR enable concurrent generation of O 3 and H 2 O 2 for efficient synergistic degradation of organic pollutants, while attenuating the energy demands of the electrolyzer. This study provides an appealing strategy for simultaneous production of O 3 and H 2 O 2 with applications in wastewater treatment.