FeZrRu Trimetallic bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries. (1st January 2023)

• Record Type: Journal Article
• Authors: Zhang, Yantong; Wang, Zilong; Guo, Sitian; Zhang, Zihan; Zeng, Xiaoyuan; Dong, Peng; Li, Mian; Xiao, Jie; Zhang, Chengxu; Hu, Jue; Zhang, Yingjie
• Is Part Of: Electrochimica acta. Volume 437(2023)
• Publication Date: 2023-01-01
• Subjects: Electrocatalysts, bifunctional electrocatalysts -- Carbon encapsulating -- Zinc-Air battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.141502
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The development of high active and stable bifunctional electrocatalysts for metal-air batteries remains a challenge due to the slow reaction kinetics both in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, a trimetallic electrocatalyst with efficient ORR and OER bifunctional catalytic activities has been fabricated by a one-step high-temperature pyrolysis methodology. The catalyst shows higher catalytic ORR and OER performance than the commercial 46% TKK platinum carbon and IrO2 catalysts, respectively, with a half-wave potential (E1/2 ) of 0.912 V vs . RHE for ORR in 0.1 M KOH and an overpotential of 250 mV at 10 mA/cm 2 for OER in 1 M KOH. Moreover, the carbon encapsulation ensures the high stability of FeZrRu/C catalysts both for both ORR and OER electrocatalysis. The Zn–air batteries using the obtained FeZrRu/C catalysts exhibit a power density as high as 221.34 mW/cm 2 . This work provides a universal strategy for the synthesis of high-performance trimetal-doped bifunctional electrocatalysts for metal-air batteries and fuel cells.