Uniformly Structured Asymmetric Coordination Ce Single-Atom Catalysts for Stable and Efficient Oxygen Reduction Reaction

Abstract

In oxygen reduction reactions, the symmetric coordination structure of traditional M-N4 catalysts limits their performance and stability. Although N2O2-type catalysts show potential, irregular morphologies hinder practical applications. This study reports herein a novel Ce-N2O2/C single-atom catalyst with uniform morphology prepared via an oxygen-containing ligand-electrospinning- staged annealing strategy, achieving a half-wave potential of 0.91 V and stable operation for 345 hours in zinc-air batteries, surpassing most reported asymmetric Ce-based single-atom catalysts.