Uniformly structured asymmetric coordination Ce single-atom catalysts for stable and efficient oxygen reduction reaction

Abstract

In oxygen reduction reactions, the symmetric M–N₄ coordination restricts both performance and stability. N₂O₂-type catalysts show promise, but their irregular morphology limits practical use. We report a Ce–N₂O₂/C single-atom catalyst with uniform morphology synthesized via an oxygen-ligand electrospinning–annealing route, delivering a 0.91 V half-wave potential and 345 h stability in zinc–air batteries, outperforming most asymmetric Ce-based SACs.