Valence-Engineering of CeO₂ Redox Modulator Boosts the Oxygen Electrocatalysis Performance in Fe/Co Dual-Atom Catalyst.

ABSTRACT: Dual-atom nitrogen-doped carbon catalysts have garnered considerable interest as air electrodes for rechargeable zinc-air batteries (ZABs), owing to their outstanding bifunctional oxygen electrocatalytic activity. Nonetheless, their practical implementation is hindered by durability issues during the oxygen reduction reaction (ORR), as the active sites are degraded by the oxidative by-products. Furthermore, the sluggish electron transfer obstructs the oxidation state transitions of Co/Fe centers to limit the oxygen evolution reaction (OER) activity. Here, the valence engineering is performed in CeO₂ redox modulator that is composed with Fe/Co dual-atom catalyst (FeCo─N─C), to resolve the stability and activity issues. The valence-engineered CeO₂ with a fast Ce^4+<

SUBMITTER: Liu H 

PROVIDER: S-EPMC12931224 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature