The rates of catalytic oxidation of cyclohexane and CO are 4 and 20 times higher, respectively, with Cu supported on a cerium-based metal–organic framework (MOF) than on the structurally analogous zirconium material. Both Ce- and Zr-based copper catalysts feature uncommon three-coordinate Cu^II sites bearing different nuclearities, as determined by Cu K-edge extended X-ray absorption fine structure analysis. These results offer molecular-level understanding of the metal–support interface in MOF catalysts and establish correlations with the more established literature on zirconia- and ceria-supported heterogeneous catalysis.

中文翻译：

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铈（IV）增强MOF中单点Cu活性位点的催化氧化活性

铜在铈基金属-有机骨架（MOF）上的负载比在结构上类似的锆材料上的高，环己烷和CO的催化氧化速率分别高出4倍和20倍。Ce和Zr基铜催化剂均具有罕见的带有不同核数的三坐标Cu ^II位，这是通过Cu K边缘扩展X射线吸收精细结构分析确定的。这些结果提供了对MOF催化剂中金属-载体界面的分子水平的了解，并与氧化锆和二氧化铈负载的多相催化的现有文献建立了联系。