Durable Zinc‐Air Batteries on a NbN‐Modified Fe‐N‐C Catalyst via a Radical‐Scavenging Strategy

and an ultralong cycling durability of 2400 h, surpassing most previously reported catalysts. Combined in situ Raman spectroscopy, in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy analyses, and theoretical calculations reveal that the integration of NbN enhances ORR activity by increasing the pyrrolic N content within the FeNC framework. Concurrently, the vacant d-orbitals of Nb effectively interact with and scavenge free radicals, thereby protecting the active sites from degradation and ensuring excellent catalytic activity and stability. This work establishes a viable pathway for developing efficient and durable non-precious ORR electrocatalysts.