Design and construction of metal‐organic framework (MOF) composite precursors have recently been considered as a promising strategy for the preparation of different structured metal/carbon‐based functional materials. Here, an MOF composite‐assisted strategy to synthesize single‐holed cobalt/N‐doped carbon hollow particles is reported. The yolk–shell polystyrene@zeolitic imidazolate framework‐67 (PS@ZIF‐67) composite precursors are first synthesized, followed by a controlled pyrolysis to obtain cobalt/N‐doped carbon hollow particles with a large single hole on each shell. Moreover, the MOF‐coating approach reported in this work can be extended to prepare various core‐shell ZIF‐67 composites with different structures and compositions. Benefiting from the structural and compositional advantages, the as‐derived single‐holed cobalt/N‐doped carbon hollow particles manifest superior electrocatalytic oxygen reduction performance with high activity and excellent durability.

中文翻译：

---

碱性介质中单孔钴/ N掺杂碳空心颗粒的形成及其对氧还原反应的增强的电催化活性

金属有机骨架（MOF）复合材料前体的设计和建造最近被认为是制备不同结构的金属/碳基功能材料的有前途的策略。在这里，据报道有MOF合成辅助策略来合成单孔钴/ N掺杂碳空心颗粒。首先合成卵黄-壳聚苯乙烯@沸石咪唑酸酯骨架-67（PS @ ZIF-67）复合材料前体，然后进行可控的热解，以获得每个壳上都有一个大单孔的钴/ N掺杂碳中空颗粒。此外，这项工作中报道的MOF涂覆方法可以扩展为制备具有不同结构和组成的各种核-壳ZIF-67复合材料。受益于结构和组成方面的优势，