O₂ activation for the green conversion of chemicals has attracted a great deal of attentions in the field of chemistry. Developing catalysts for aerobic oxidation with both prominent instinct activity and desirable micro/nanostructure remains a tough challenge. In this work, hierarchical hollow Co–Ni–Mo–O mixed metallic-oxide nanotubes constructed by ultrathin CoMoO₄/NiMoO₄ nanosheets were fabricated using a sacrificial template method and employed as catalysts in aerobic oxidative desulfurization (AODS) of a model fuel. With air as the oxygen source, the catalyst demonstrated surprisingly high activity by achieving complete conversion of dibenzothiophene under mild reaction conditions. Besides, the catalyst demonstrated excellent stability on continuous repeated use. A further mechanism study reveals the electron coordination and transfer between different metal species as well as the activation route of O₂. Based on the above-mentioned results, the catalyst which allows a good exposure of metal centers, a high concentration of oxygen vacancies, and the desired electronic structure is expected to serve as the high-performance AODS catalyst.

中文翻译：

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分层空心Co-Ni-Mo-O混合金属氧化物纳米管的形态控制结构和好氧氧化脱硫

用于化学产品绿色转化的O ₂活化引起了化学领域的广泛关注。开发具有显着本能和理想的微/纳米结构的好氧氧化催化剂仍然是一个艰巨的挑战。在这项工作中，由超薄CoMoO ₄ / NiMoO ₄构成的分层空心Co-Ni-Mo-O混合金属氧化物纳米管使用牺牲模板方法制造纳米片，并在模型燃料的好氧氧化脱硫（AODS）中用作催化剂。以空气作为氧源，该催化剂通过在温和的反应条件下实现二苯并噻吩的完全转化而显示出惊人的高活性。此外，该催化剂在连续重复使用时显示出优异的稳定性。进一步的机理研究揭示了不同金属物种之间的电子配位和转移以及O ₂的活化途径。基于上述结果，期望使金属中心良好暴露，高氧空位浓度和期望的电子结构的催化剂用作高性能AODS催化剂。