Olefin epoxidation plays an important role in chemical industry because of the significance of epoxides. Developing cost‐effective catalysts with high catalytic performance for epoxidation is of great importance. Herein, we report a promising heterogeneous catalyst based on Co₃O₄ nanoparticles encapsulated in the inside wall of a meso‐SiO₂ shell (denoted as Co₃O₄@meso‐SiO₂) as hollow nanoreactor. Due to the particular hollow structure as well as mesoporous shell wall, the resulting catalyst showed excellent activity and recyclability for various olefins with molecular oxygen and iso‐butyraldehyde as co‐oxidants.

中文翻译：

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由ZIF-67制备的Co3O4 @ meso-SiO2空心纳米反应器作为烯烃被氧环氧化的高效催化剂

由于环氧化物的重要性，烯烃环氧化在化学工业中起着重要作用。开发具有高催化性能的高效环氧化催化剂非常重要。本文中，我们报道了一种有前途的多相催化剂，该催化剂基于包裹在中空SiO ₂壳（表示为Co ₃ O ₄ @ meso-SiO ₂）内壁中的Co ₃ O ₄纳米颗粒作为空心纳米反应器。由于其特殊的中空结构和中孔壳壁，所得到的催化剂对于以分子氧和异丁醛为助氧化剂的各种烯烃表现出出色的活性和可回收性。