Tailoring the d ‐Band Centers of Perovskite Oxides for Electrochemical Ozone Production

Abstract Ozone is one of the most powerful oxidants for disinfection and sterilization. Water electrolysis represents an attractive method for electrochemical ozone production (EOP). Looking for highly active and cost‐effective alternative electrocatalysts to replace toxic PbO 2 on the anode of the EOP electrolyzer is important. Here, a series of scalable, low‐toxicity ABO 3 perovskite electrocatalysts was successfully synthesized, and their EOP performances were evaluated on the basis of their d ‐band center values. Experimental results show that the gaseous ozone output of PrCoO 3 is almost 1.3 times higher compared with that of commercial β ‐PbO 2 . Theoretical calculations indicate that the volcanic‐type EOP performance of ABO 3 can be attributed to the d ‐band center of Co modified by lanthanide elements. Moreover, PrCoO 3 demonstrates a remarkable performance in the electrodegradation of various organic pesticides and antibiotics, revealing potential application in advanced oxidation processes.