biostudies-literatureChen ZChina Scholarship CouncilDeutsche ForschungsgemeinschaftAlexander von Humboldt-StiftungNational Natural Science Foundation of ChinaGutenberg Forschungskollege2409161https://www.ebi.ac.uk/biostudies/studies/S-EPMC11753497biostudies-literatureUnknown21(3)Efficient and robust electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are crucial for fuel cells, metal-air batteries, and other energy technologies. Here, a highly stable, efficient bifunctional OER/ORR electrocatalyst (FeNi-NC@MWCNTs) is reported and demonstrated its integration and robust performance in an aqueous Zinc-air battery (ZAB). The catalyst is based on neighboring iron/nickel sites (FeNiN₆) which are atomically dispersed on porous nitrogen-doped carbon particles. The particles are wrapped in electrically conductive multi-walled carbon nanotubes for enhanced electrical conductivity. Electrocatalytic analyses show high OER and ORR performance (OER/ORR voltage difference = 0.69 V). Catalyst integration in a ZAB results in excSmall (Weinheim an der Bergstrasse, Germany)A Bifunctional Iron-Nickel Oxygen Reduction/Oxygen Evolution Catalyst for High-Performance Rechargeable Zinc-Air Batteries.PMC1175349751022879338918349620210637005722171073364549901Hwang BJCao KRahali SChala SAMa NLiu RLuo HCheng WCheung CCChen ZJin MChang CYWang YStreb CEbrahimi ELakshmanan KfalseA Bifunctional Iron-Nickel Oxygen Reduction/Oxygen Evolution Catalyst for High-Performance Rechargeable Zinc-Air Batteries.Efficient and robust electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are crucial for fuel cells, metal-air batteries, and other energy technologies. Here, a highly stable, efficient bifunctional OER/ORR electrocatalyst (FeNi-NC@MWCNTs) is reported and demonstrated its integration and robust performance in an aqueous Zinc-air battery (ZAB). The catalyst is based on neighboring iron/nickel sites (FeNiN₆) which are atomically dispersed on porous nitrogen-doped carbon particles. The particles are wrapped in electrically conductive multi-walled carbon nanotubes for enhanced electrical conductivity. Electrocatalytic analyses show high OER and ORR performance (OER/ORR voltage difference = 0.69 V). Catalyst integration in a ZAB results in exc2025-01-01T00:00:00Z2025 Jan2025-04-05T00:26:59.892Z2025-04-05T00:26:59.892ZS-EPMC117534973960422810.1002/smll.202409161