Highly dispersed Co–N–C catalysts were successfully prepared via a defect strategy to anchor metal atoms with a carbon coating. The catalysts showed remarkable catalytic performance under mild conditions (a yield of 97.0% for ethylbenzene oxidation). Meanwhile, BET, TEM, XRD, Raman spectroscopy and XPS studies were employed to investigate the as-prepared catalysts. The results revealed that the unique structure was conducive to producing more defects in carbon, increasing the number of active sites and enhancing the dispersion of cobalt. The outstanding catalytic performance of the catalysts was attributed to the synergy effect of the special structure and the Co–N, pyridine nitrogen and graphite nitrogen species.

中文翻译：

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基于缺陷锚固的原位合成具有碳涂层三明治结构的高分散Co–N–C催化剂

通过缺陷策略成功地制备了高度分散的Co-N-C催化剂，以通过碳涂层固定金属原子。该催化剂在温和条件下表现出显着的催化性能（乙苯氧化产率为97.0％）。同时，通过BET，TEM，XRD，拉曼光谱和XPS研究来研究所制备的催化剂。结果表明，独特的结构有助于在碳中产生更多的缺陷，增加活性位点的数量并增强钴的分散性。催化剂出色的催化性能归因于特殊结构与Co-N，吡啶氮和石墨氮的协同作用。