To overcome slow kinetics of oxygen reduction/evolution reactions (ORR/OER), the development of bifunctional electrocatalysts remains a huge challenge. FeCo alloy as an active-species usually suffers from its poor catalytic stability by easy corrosion. Here, we synthesize a core (FeCo)-shell (carbon) alloy anchored on nitrogen-doped porous carbon-nanosheets (FeCo/NUCSs) via a self-growth strategy. FeCo/NUCSs (140 m² g⁻¹) exhibits promising half-wave potential (E_1/2 =0.89 V) and methanol tolerance for ORR. Prussian blue analog-derived carbon shell protects binary active-sites (Fe-N_x/Co-N_x) on FeCo core to stabilize ORR activity. FeCo/NUCSs also displays a higher OER activity (overpotential of 300 mV) than RuO₂, due to generation of highly-active FeOOH/CoOOH species on FeCo alloys as indicated by in situ X-ray diffraction. Assembled Zn-air battery (ZAB) exhibits promising open-circuit voltage of 1.51 V, specific capacity of 791.86 mA h g⁻¹, and durability (102 h). This novel bimetallic alloy-based catalyst provides an interesting option for design of durable oxygen-electrocatalysts for ZAB.

为了克服氧还原/析出反应（ORR/OER）的缓慢动力学，双功能电催化剂的开发仍然是一个巨大的挑战。FeCo合金作为一种活性物质，通常存在催化稳定性差、易腐蚀等问题。在这里，我们通过自生长策略合成了锚定在氮掺杂多孔碳纳米片（FeCo/NUCSs）上的核（FeCo）-壳（碳）合金。FeCo/NUCSs (140 m ² g ^-1 )表现出良好的半波电位(E _1/2 =0.89 V)和ORR的甲醇耐受性。普鲁士蓝类似物衍生的碳壳保护 FeCo 核心上的二元活性位点 (Fe-N _x /Co-N _x ) 以稳定 ORR 活性。FeCo/NUCSs 也显示出比 RuO 更高的 OER 活性（300 mV 的过电位）_如图2所示，由于原位X射线衍射表明在FeCo合金上产生了高活性FeOOH/CoOOH物质。组装的锌空气电池 (ZAB) 具有 1.51 V 的开路电压、791.86 mA h g ^-1的比容量和耐用性（102 h）。这种新型双金属合金基催化剂为设计用于 ZAB 的耐用氧电催化剂提供了一个有趣的选择。