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

• Published in: ChemistrySelect (Weinheim) Vol. 7; no. 19
• Main Authors: Zheng, Haiyang, Gao, Yijing, Wang, Xiaosa, Shi, Huaijie, Gu, Yu, Jiang, Wenbin, Liu, Jia, Li, Suiqin, Li, Aiyuan, Wang, Shibin, Wang, Jianguo, Zhong, Xing
• Format: Journal Article
• Language: English
• Published: 19.05.2022
• Subjects: advanced oxidation process; electrochemistry; ozone; perovskite oxide; water splitting
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202200966

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 PbO2 on the anode of the EOP electrolyzer is important. Here, a series of scalable, low‐toxicity ABO3 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 PrCoO3 is almost 1.3 times higher compared with that of commercial β‐PbO2. Theoretical calculations indicate that the volcanic‐type EOP performance of ABO3 can be attributed to the d‐band center of Co modified by lanthanide elements. Moreover, PrCoO3 demonstrates a remarkable performance in the electrodegradation of various organic pesticides and antibiotics, revealing potential application in advanced oxidation processes. The PrCoO3 perovskite electrocatalyst was successfully synthesized, which has significant electrocatalytic activity of EOP. The DFT calculation illustrates that the excellent EOP activity of PrCoO3 comes from the appropriate d‐band centers, which enhance the lattice O−O binding on the ACoO3 surface, thereby promoting the evolution of O3. Moreover, PrCoO3 demonstrates a remarkable performance in the electrodegradation of various organic pesticides and antibiotics.