Cobalt-based spinel oxides are promising low-cost catalysts for volatile organic compounds (VOCs) elimination. Herein, we prepared the cobalt-based spinel oxides (MCoO: M = Ni, Cu, Co, Zn) by a one-step solvothermal method to evaluate the influence of cation substitution on benzene combustion. The cation distribution on tetrahedral and octahedral sites could influence the degree of inversion in cobalt-based spinel oxides, thus achieving the regulation of Co-O bond strength. NiCoO catalyst with the spinel structure had the weak Co-O bond strength, which is conducive to the activation of lattice oxygen to improve the activity of benzene degradation. This work provides deep insights into the influence of the cation substitution on the cobalt-based spinel catalysts for the efficient benzene oxidation.

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通过阳离子取代调节钴基尖晶石催化剂的苯活性

钴基尖晶石氧化物是消除挥发性有机化合物 (VOC) 的有前景的低成本催化剂。在此，我们通过一步溶剂热法制备了钴基尖晶石氧化物（MCoO：M = Ni，Cu，Co，Zn），以评估阳离子取代对苯燃烧的影响。四面体和八面体位点上的阳离子分布可以影响钴基尖晶石氧化物的反转程度，从而实现Co-O键强度的调控。尖晶石结构的NiCoO催化剂Co-O键强度较弱，有利于晶格氧的活化，提高苯降解活性。这项工作深入探讨了阳离子取代对钴基尖晶石催化剂有效苯氧化的影响。