Optimizing electronic synergy of atomically dispersed dual-metal Ni–N₄ and Fe–N₄ sites with adjacent Fe nanoclusters for high-efficiency oxygen electrocatalysis

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The electronic synergy of Fe nanoclusters and Ni/Fe–N 4 single-atomic sites optimizes the adsorption/desorption of oxygenated intermediates and reduces the energy barrier of the oxygen electrocatalysis, boosting the Zn–air batteries performance.