The construction of a porous carbon structure with a high specific surface area is conducive to enhanced electrocatalytic activity due to the accessibility of active sites and improvement of the mass transfer. Herein, we explored the possibility of using micelles of mesoporous silica (MCM-48) as the carbon source to generate porous carbon under the confinement of MCM-48 channels. The complexes formed by Co²⁺ and 4,4′-bipyridine were in situ incorporated into the micelles to derive Co-related active sites (Co-N_x, Co, and Co₃O₄) for catalyzing the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). After pyrolysis in the N₂ atmosphere and subsequent removal of the MCM-48 skeleton, the target porous carbon electrocatalyst was obtained, which exhibited promising performance for both ORR and OER and has great potential as the cathode material for Zn–air battery application. This work not only confirms the effectiveness of using the micelles of MCM-48 as the carbon source for preparing the porous carbon materials, but also provides a new platform for design and synthesis of structurally controllable materials for energy-related electrocatalytic applications.

中文翻译：

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用钴络合物修饰的介孔二氧化硅胶束构建多孔碳电催化剂用于氧还原/析出反应

由于活性位点的可及性和传质的改善，具有高比表面积的多孔碳结构的构建有利于增强电催化活性。在此，我们探索了使用介孔二氧化硅（MCM-48）胶束作为碳源在 MCM-48 通道限制下生成多孔碳的可能性。由 Co ²⁺和 4,4'-联吡啶形成的复合物被原位掺入胶束中以衍生出 Co 相关活性位点（Co-N _x、Co 和 Co ₃ O ₄），用于催化氧还原反应（ORR） ) 和析氧反应 (OER)。在 N _{2 中}热解后在气氛和随后去除 MCM-48 骨架的过程中，获得了目标多孔碳电催化剂，该催化剂在 ORR 和 OER 方面均表现出良好的性能，并且作为锌空气电池应用的正极材料具有巨大潜力。这项工作不仅证实了使用 MCM-48 胶束作为碳源制备多孔碳材料的有效性，而且为设计和合成用于能源相关电催化应用的结构可控材料提供了新的平台。