Single atom catalysts (SACs), featured with atomically dispersed metal species, have been considered as one of the most promising catalytic materials because of the excellent performance in various high-value-added reactions. However, the large-scale and continuous-type production of such SACs is still challenging. Herein, a novel and facile microcapsule strategy for the quasi-continuous synthesis of iron SACs supported on S, N co-doped carbon (Fe/SNC) is developed, and the Fe species are presented as isolated active sites and stabilized as the FeN₃S-like structure. The as-prepared Fe/SNC catalysts exhibit excellent catalytic properties for selective oxidation of arylalkanes, which followed pseudo-first-order kinetics with an E_a = 41.5 kJ/mol. More importantly, the two Fe/SNC catalysts synthesized at different continuous times showed essentially identical catalyst structure and catalytic performance, demonstrating the superior reliability of our microcapsule strategy for the quasi-continuous production of SACs, which can be easily scaled up to industrial application.

中文翻译：

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微胶囊热解策略准连续合成铁单原子催化剂

具有原子分散的金属物种特征的单原子催化剂（SAC）由于在各种高附加值反应中的出色性能而被认为是最有希望的催化材料之一。但是，这种SAC的大规模连续生产仍然具有挑战性。本文中，开发了一种新颖且简便的微囊策略，用于半连续合成负载在S，N共掺杂碳（Fe / SNC）上的铁SAC，并且Fe物种以孤立的活性位点形式存在，并稳定为FeN _3。呈S状结构。所制备的Fe / SNC催化剂对芳基烷烃的选择性氧化表现出优异的催化性能，其遵循的伪一级反应动力学为E _a＝ 41.5kJ / mol。更重要的是，在不同连续时间合成的两种Fe / SNC催化剂显示出基本相同的催化剂结构和催化性能，证明了我们的微胶囊策略在准连续生产SAC方面具有出色的可靠性，可以轻松扩展到工业应用。