Using defect-rich carbon with slightly oxidized palladium and oxygen-vacancy-induced cobalt oxide from ZIF-67 improves the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which are crucial reactions for air cathodes of desirable Zn–air batteries. Electron-deficient palladium and free electron at oxygen vacancies facilitate the adsorption of oxygen species, thereby enhancing the OER performance. Moreover, hybridization of defect-rich N-doped carbon with catalytically active Pd nanoparticles advances the ORR activity. Through a delicate synthetic method, we synthesized the bi-functional catalysts, Pd and CoO_x embedded in defect-rich and N-doped carbon materials (Pd/CoO_x/d-NC), for rechargeable Zn–air battery. Pd/CoO_x/d-NC exhibits superior activities and robust durability for both the ORR and OER. In addition, it shows higher performance than the benchmark Pt/C + IrO₂ when applied to the Zn–air battery. The robust durability for ORR and OER of Pd/CoO_x/d-NC results in charge–discharge cycle stability. The outstanding catalytic activities and stable cycle life of Pd/CoO_x/d-NC verifies its potential as a catalyst for air cathode in practical Zn–air battery application.

使用富含缺陷的碳与轻微氧化的钯和来自 ZIF-67 的氧空位诱导的氧化钴改善氧还原反应 (ORR) 和析氧反应 (OER)，这对于理想的锌空气电池的空气阴极至关重要. 缺电子钯和氧空位处的自由电子促进氧物质的吸附，从而提高OER性能。此外，富含缺陷的 N 掺杂碳与催化活性 Pd 纳米颗粒的杂交提高了 ORR 活性。通过一种精细的合成方法，我们合成了嵌入富缺陷和 N 掺杂碳材料 (Pd/CoO _x /d-NC) 中的双功能催化剂 Pd 和 CoO _x，用于可充电锌空气电池。Pd/CoO _x/d-NC 对 ORR 和 OER 都表现出卓越的活性和强大的耐用性。此外，当应用于锌空气电池时，它显示出比基准 Pt/C + IrO _{2更高的性能。Pd/CoO x} /d-NC的 ORR 和 OER 的稳健耐用性导致充放电循环稳定性。_{Pd/CoO x} /d-NC出色的催化活性和稳定的循环寿命验证了其在实际锌空气电池应用中作为空气阴极催化剂的潜力。