Site-Directed Synthesis of Cobalt Oxide Clusters in a Metal–Organic Framework,ACS Applied Materials & Interfaces

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Site-Directed Synthesis of Cobalt Oxide Clusters in a Metal–Organic Framework
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-04-19 00:00:00 , DOI: 10.1021/acsami.8b02825
Aaron W. Peters ₁ , Kenichi Otake ₁ , Ana E. Platero-Prats ₂ , Zhanyong Li ₁ , Matthew R. DeStefano ₁ , Karena W. Chapman ₂ , Omar K. Farha _{1,

3} , Joseph T. Hupp ₁

Affiliation

Direct control over structure and location of catalytic species deposited on amorphous supports represents a formidable challenge in heterogeneous catalysis. In contrast, a structurally well-defined, crystalline metal–organic framework (MOF) can be rationally designed using postsynthetic techniques to allow for desired structural or locational changes of deposited metal ions. Herein, naphthalene dicarboxylate linkers are incorporated in the MOF, NU-1000, to block the small cavities where few-atom clusters of cobalt oxide preferentially grow, inducing catalyst deposition toward hitherto ill-favored grafting sites orientated toward NU-1000s mesoporous channels. Despite the different cobalt oxide location, the resulting material is still an active propane oxidative dehydrogenation catalyst at low temperature, reaching a turnover frequency of 0.68 ± 0.05 h^–1 at 230 °C and confirming the utility of MOFs as crystalline supports to guide rational design of catalysts.

中文翻译：

金属-有机骨架中的氧化钴簇的定点合成

直接控制沉积在无定形载体上的催化物质的结构和位置代表了非均相催化中的巨大挑战。相反，可以使用后合成技术合理设计结构明确的晶体金属-有机骨架（MOF），以允许沉积的金属离子发生所需的结构或位置变化。本文中，将萘二甲酸酯连接基掺入MOF NU-1000中，以阻止小腔室，其中很少有原子簇的氧化钴优先生长，从而导致催化剂向迄今为止不利于NU-1000介孔通道的接枝位点沉积。尽管氧化钴位置不同，但所得材料在低温下仍是活性丙烷氧化脱氢催化剂，周转频率达到0.68±0。在230°C时为^–1，证实了MOF作为结晶载体的用途，可指导催化剂的合理设计。

更新日期：2018-04-19

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