Abstract Carbonized zeolitic imidazolate frameworks (ZIFs) show potential as mesoporous heterogeneous catalysts with high metal loadings. ZIF-67 and ZIF-8 were used to create mono- and bimetallic CoCu particles supported on nitrogen-doped carbon via self-assembly in methanol at room temperature, followed by carbonization at 675 °C. A Cu precursor, Cu(NO 3 ) 2 ·2H 2 O, was impregnated into the ZIF-67 before carbonization to obtain bimetallic catalysts. Nanoalloy particles with different CoCu ratio were synthesized and characterized using XRD. The materials were further characterized using TEM, SEM, XRF and nitrogen physisorption. The different alloys were tested in conversion of cyclohexanone to the corresponding silyl ether. Complete conversion of cyclohexanone at 90 °C for 24 h were obtained. The catalyst Co 99 Cu 1 @NC gave a 60% increase in yield over a pure Co analogue. Graphic Abstract

中文翻译：

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MOF衍生碳负载CoCu合金纳米粒子用于酮氢化硅烷化的研究

摘要 碳化沸石咪唑酯骨架 (ZIF) 显示出作为具有高金属负载量的介孔多相催化剂的潜力。ZIF-67 和 ZIF-8 用于通过在室温下在甲醇中自组装，然后在 675°C 下碳化来制造负载在氮掺杂碳上的单金属和双金属 CoCu 颗粒。在碳化之前将Cu前体Cu(NO 3 ) 2 ·2H 2 O浸渍到ZIF-67中以获得双金属催化剂。合成了具有不同 CoCu 比例的纳米合金颗粒，并使用 XRD 对其进行了表征。使用 TEM、SEM、XRF 和氮物理吸附进一步表征材料。在环己酮向相应的甲硅烷基醚的转化中测试了不同的合金。环己酮在 90 °C 下 24 小时完全转化。与纯 Co 类似物相比，催化剂 Co 99 Cu 1 @NC 的产率提高了 60%。图形摘要