Although metal–organic frameworks (MOFs) are being widely used to derive functional nanomaterials through pyrolysis, the actual mechanisms involved remain unclear. In the limited studies to date, elemental metallic species are found to be the initial products, which limits the variety of MOF‐derived nanomaterials. Here, the pyrolysis of a manganese triazolate MOF is examined carefully in terms of phase transformation, reaction pathways, and morphology evolution in different conditions. Surprisingly, the formation of metal is not detected when manganese triazolate is pyrolyzed in an oxygen‐free environment. Instead, a direct transformation into nanoparticles of manganese nitride, Mn₂N_x embedded in N‐doped graphitic carbon took place. The electrically conductive Mn₂N_x nanoparticles show much better air stability than bulk samples and exhibit promising electrocatalytic performance for the oxygen reduction reaction. The findings on pyrolysis mechanisms expand the potential of MOF as a precursor to derive more functional nanomaterials.

中文翻译：

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三氮唑酸锰金属有机骨架直接热解成空气稳定的氮化锰纳米颗粒

尽管金属有机框架（MOF）被广泛用于通过热解衍生功能性纳米材料，但所涉及的实际机制仍不清楚。在迄今为止有限的研究中，发现元素金属物质是初始产物，这限制了 MOF 衍生纳米材料的种类。在这里，从不同条件下的相变、反应途径和形态演变方面仔细研究了三唑酸锰 MOF 的热解。令人惊讶的是，当三唑酸锰在无氧环境中热解时，没有检测到金属的形成。相反，直接转变为嵌入氮掺杂石墨碳中的氮化锰纳米颗粒，Mn ₂ N _x。导电Mn ₂ N _x纳米粒子表现出比块状样品更好的空气稳定性，并且在氧还原反应中表现出有前景的电催化性能。关于热解机制的发现扩大了 MOF 作为前体衍生更多功能纳米材料的潜力。