We report a simple yet robust route to bifunctional electrocatalysts comprising FeNi and Co₄N hybrid nanoparticles co-embedded within N-doped carbon nanosheets (denoted FeNi/Co₄N-NCS) for rechargeable Zn-air batteries (ZABs) with high power density and capacity as well as outstanding cycling stability, markedly outperforming the Pt/C&IrO₂ electrocatalyst counterpart. The as-crafted FeNi/Co₄N-NCS electrocatalysts display outstanding bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity with a low overall oxygen electrode activity (ΔE = 0.664 V). Density functional theory (DFT) calculations reveal that the synergy of FeNi and Co₄N reduces the rate-determining step (RDS) energy barrier, thereby greatly increasing electrocatalytic activity. The aqueous ZAB assembled with FeNi/Co₄N-NCS delivers a high power density of 160 mW cm⁻², large specific capacity of 812 mAh g⁻¹_Zn, and long cycling life of 1450 h at 5 mA cm⁻². This study highlights an effective strategy to yield durable bifunctional electrocatalysts for metal-air batteries.

我们报告了一种简单而稳健的双功能电催化剂路线，包括共嵌入 N 掺杂碳纳米片（表示为 FeNi/Co _{4 N-NCS）中的 FeNi 和 Co 4} N 杂化纳米粒子，用于高功率密度的可充电锌空气电池（ZAB）和容量以及出色的循环稳定性，明显优于 Pt/C&IrO ₂电催化剂对应物。自制的 FeNi/Co ₄ N-NCS 电催化剂显示出出色的双功能氧还原反应 (ORR) 和析氧反应 (OER) 活性，且整体氧电极活性较低 (Δ E  = 0.664 V)。密度泛函理论 (DFT) 计算表明 FeNi 和 Co _{4的协同作用}N 降低了速率决定步骤 (RDS) 的能量势垒，从而大大提高了电催化活性。_{FeNi/Co 4} N-NCS组装的水基 ZAB具有 160 mW cm ^-2的高功率密度、812 mAh g ^-1 _Zn的大比容量以及 5 mA cm ^-2下 1450 小时的长循环寿命。这项研究强调了一种为金属空气电池生产耐用双功能电催化剂的有效策略。