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Direct synthesis of Cu supported on mesoporous silica: Tailoring the Cu loading and the activity for ethanol dehydrogenation
Catalysis Today ( IF 5.3 ) Pub Date : 2020-10-18 , DOI: 10.1016/j.cattod.2020.10.019
Pedro H. Finger , Taynara A. Osmari , Natalia M. Cabral , José Maria C. Bueno , Jean Marcel R. Gallo

One-pot methodologies for the synthesis of copper supported in mesoporous silica was developed. Parameters such as pH, time, and temperature of aging interfered in the loading of Cu impregnated. The Cu loadings affected both the textural properties of the silica support and the Cu nanoparticles. As the Cu loading increases, the catalyst showed more reduced Cu nanoparticles with a higher Cu-Cu coordination number (NCu-Cu). The bond length Cu-Cu (RCu-Cu) also correlates linearly with the NCu-Cu and appears to be dependent on the particle size and not affected by electronic parameters. It was possible to identify that the RCu-Cu parameter correlated linearly with the activity per site of Cu.



中文翻译:

介孔二氧化硅负载铜的直接合成:调整铜负载量和乙醇脱氢活性

开发了用于合成负载在介孔二氧化硅中的铜的一锅法。pH、时间和老化温度等参数会干扰浸渍铜的负载。Cu 负载量影响二氧化硅载体和 Cu 纳米颗粒的结构特性。随着Cu负载量的增加,催化剂表现出更多还原的Cu纳米颗粒,具有更高的Cu-Cu配位数(N Cu-Cu)。键长 Cu-Cu (R Cu-Cu ) 也与 N Cu-Cu呈线性相关,似乎取决于颗粒尺寸,不受电子参数的影响。可以确定 R Cu-Cu参数与每个 Cu 位点的活性呈线性相关。

更新日期:2020-10-18
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