A series of MnCo-MOF-74 catalysts were prepared by incorporating Mn into Co-MOF-74 via a postsynthetic exchange method, and confirmed by different characterization techniques. The resulting catalysts were analyzed in detail for toluene selective oxidation under mild conditions. Compared to the original Co-MOF-74, MnCo-MOF-74 showed enhanced catalytic activity (17.6%) and high selectivity towards benzaldehyde (98.3%). The study of adsorption between toluene and catalysts indicated that MnCo-MOF-74 catalysts benefit from the synergistic effects between the Mn and Co cations incorporated into the same framework, which promoted the efficient transformation of toluene into benzaldehyde. Moreover, MnCo-MOF-74 catalysts also converted various substituted toluene into their corresponding aldehydes under appropriate conditions. This work proposes a strategy for developing metal–organic framework materials with enhanced activity in heterogeneous catalysis.

中文翻译：

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MnCo-MOF-74增强的活性对取代甲苯的高选择性好氧氧化†

通过将Mn通过以下方式引入Co-MOF-74中来制备一系列MnCo-MOF-74催化剂后合成交换方法，并通过不同的表征技术得到证实。详细分析了所得催化剂在温和条件下甲苯选择性氧化的情况。与原始的Co-MOF-74相比，MnCo-MOF-74表现出增强的催化活性（17.6％）和对苯甲醛的高选择性（98.3％）。对甲苯和催化剂之间吸附的研究表明，MnCo-MOF-74催化剂受益于在同一骨架中掺入的Mn和Co阳离子之间的协同作用，从而促进了甲苯向苯甲醛的有效转化。而且，MnCo-MOF-74催化剂还在合适的条件下将各种取代的甲苯转化为它们相应的醛。