Active component management and microengineering of metal nanoparticles are significant challenges for efficient M/N/C electrocatalysts, as a crucial electrode material for reversible zinc–air batteries, because of the lack of a multifunctional structural strategy in the electrocatalytic preparation process. Here, a convenient, one-step pyrolysis method was introduced into the preparation process of a difunctional electrocatalyst, an Fe-, Co-, and N-codoped carbon-based cube hybrid (Co₇Fe₃/CFNC) with abundant active components, including metallic Co₇Fe₃ nanoparticles and Fe/Co–N_x species. The as-constructed Co₇Fe₃/CFNC demonstrates impressive activity/stability for ORR/OER. Moreover, practical zinc–air battery building with Co₇Fe₃/CFNC electrocatalysts reveals a superior cycling stability for 224 h. Our work could educate a new applicable branch for designing multifunctional catalysts and regulating their active sites to apply the energy and environment.

中文翻译：

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限制在 N 掺杂碳纳米立方体中的 Co7Fe3 纳米颗粒用于高效、可充电锌空气电池

由于在电催化制备过程中缺乏多功能结构策略，金属纳米粒子的活性成分管理和微工程是高效 M/N/C 电催化剂的重大挑战，作为可逆锌空气电池的关键电极材料。在这里，将一种方便的一步热解方法引入到双功能电催化剂的制备过程中，即具有丰富活性成分的 Fe-、Co-和 N-共掺杂碳基立方体杂化物 (Co ₇ Fe ₃ /CFNC)，包括金属Co ₇ Fe ₃纳米颗粒和Fe/Co-N _x物质。建成后的 Co ₇ Fe ₃/CFNC 展示了 ORR/OER 令人印象深刻的活性/稳定性。_{此外，使用 Co 7} Fe ₃ /CFNC 电催化剂构建的实用锌空气电池显示出优异的 224 小时循环稳定性。我们的工作可以培养一个新的适用分支来设计多功能催化剂并调节其活性位点以应用能源和环境。