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首页> 外文期刊>Catalysis science & technology >Multistep protection strategy for preparation of atomically dispersed Fe-N catalysts for selective oxidation of ethylbenzene to acetophenone
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Multistep protection strategy for preparation of atomically dispersed Fe-N catalysts for selective oxidation of ethylbenzene to acetophenone

机译：多步保护策略，用于制备原子分散的Fe-N催化剂，以选择性氧化乙烯烯烯为乙烯酮

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摘要

The fabrication of catalysts with atomically dispersed metal active sites is a hot research topic in catalysis, but the controllable preparation of single-atom catalysts still presents several challenges due to the aggregation tendency of active sites. Herein, an elaborate multistep protection strategy for the preparation of atomically dispersed Fe atoms on three-dimensional N-doped hollow carbon spheres was reported. Experimental results show that the pre-separation of 1,10-phenanthroline, the anchoring effect with N sites, and the three-dimensional hollow spherical structure of the support are crucial to achieving atomic dispersion of Fe atoms. The obtained single-atom catalysts, labeled as Fe-N@HCS-T (T represents the calcination temperature), were analyzed in detail. Fe-N@HCS-T exhibited excellent catalytic activity and selectivity for the oxidation of ethylbenzene under mild reaction conditions. Furthermore, the prepared catalysts exhibit excellent stability and recyclability. Therefore, this study is expected to provide a feasible strategy for the design of high-efficiency single-atom catalysts for future catalytic applications.
机译：用原子分散的金属活性位点制造催化剂是催化中的热门研究主题，但是由于有源位点的聚集趋势，单原子催化剂的可控制备仍然提出了一些挑战。据报道，在此，据报道，在三维N掺杂的空心碳球体上制备原子分散的Fe原子的精细多步保护策略。实验结果表明，1,10-苯恐怖丝的前分离，n个位点的锚定效应以及支撑的三维空心球形结构对于实现Fe原子的原子分散至关重要。详细分析了所获得的单原子催化剂，标记为Fe-N@HCS-T（T表示钙化温度）。 Fe-N@HCS-T在轻度反应条件下表现出极好的催化活性和对乙烯氧化的选择性。此外，制备的催化剂表现出极好的稳定性和可回收性。因此，预计该研究将为未来的催化应用设计高效单原子催化剂的设计提供可行的策略。

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