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Palladium supported on a novel ordered mesoporous polypyrrole/carbon nanocomposite as a powerful heterogeneous catalyst for the aerobic oxidation of alcohols to carboxylic acids and ketones on water
RSC Advances ( IF 3.9 ) Pub Date : 2020-4-3 , DOI: 10.1039/c9ra10941b Nasim Ganji 1 , Babak Karimi 1, 2 , Sepideh Najafvand-Derikvandi 1 , Hojatollah Vali 3
RSC Advances ( IF 3.9 ) Pub Date : 2020-4-3 , DOI: 10.1039/c9ra10941b Nasim Ganji 1 , Babak Karimi 1, 2 , Sepideh Najafvand-Derikvandi 1 , Hojatollah Vali 3
Affiliation
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Preparation of an ordered mesoporous polypyrrole/carbon (PPy/OMC) composite has been described through a two-step nanocasting process using KIT-6 as a template. Characterization of the PPy/OMC nanocomposite by various analysis methods such as TEM, XRD, TGA, SEM and N2 sorption confirmed the preparation of a material with ordered mesoporous structure, uniform pore size distribution, high surface area and high stability. This nanocomposite was then used for the immobilization of palladium nanoparticles. The nanoparticles were almost uniformly distributed on the support with a narrow particle size of 20–25 nm, confirmed by various analysis methods. Performance of the Pd@PPy/OMC catalyst was evaluated in the aerobic oxidation of various primary and secondary alcohols on water as a green solvent, giving the corresponding carboxylic acids and ketones in high yields and excellent selectivity. The catalyst could also be reused for at least 10 reaction runs without losing its catalytic activity and selectivity. High catalytic efficiency of the catalyst can be attributed to a strong synergism between the PPy/OMC and that of supported Pd nanoparticles.
中文翻译：
负载在新型有序介孔聚吡咯/碳纳米复合材料上的钯作为一种强大的多相催化剂，用于在水中将醇氧化为羧酸和酮
通过使用 KIT-6 作为模板的两步纳米铸造工艺，描述了有序介孔聚吡咯/碳 (PPy/OMC) 复合材料的制备。通过各种分析方法（如 TEM、XRD、TGA、SEM 和 N 2 ）表征 PPy/OMC 纳米复合材料吸附证实了制备具有有序介孔结构、均匀孔径分布、高表面积和高稳定性的材料。然后将该纳米复合材料用于钯纳米粒子的固定。纳米粒子几乎均匀地分布在载体上，粒径为 20-25 nm，经各种分析方法证实。评价了 Pd@PPy/OMC 催化剂在以水为绿色溶剂的各种伯醇和仲醇的有氧氧化中的性能，以高收率和优异的选择性得到相应的羧酸和酮。该催化剂还可以重复使用至少 10 次反应，而不会失去其催化活性和选择性。
更新日期：2020-04-03
中文翻译：
负载在新型有序介孔聚吡咯/碳纳米复合材料上的钯作为一种强大的多相催化剂，用于在水中将醇氧化为羧酸和酮
通过使用 KIT-6 作为模板的两步纳米铸造工艺，描述了有序介孔聚吡咯/碳 (PPy/OMC) 复合材料的制备。通过各种分析方法（如 TEM、XRD、TGA、SEM 和 N 2 ）表征 PPy/OMC 纳米复合材料吸附证实了制备具有有序介孔结构、均匀孔径分布、高表面积和高稳定性的材料。然后将该纳米复合材料用于钯纳米粒子的固定。纳米粒子几乎均匀地分布在载体上，粒径为 20-25 nm，经各种分析方法证实。评价了 Pd@PPy/OMC 催化剂在以水为绿色溶剂的各种伯醇和仲醇的有氧氧化中的性能，以高收率和优异的选择性得到相应的羧酸和酮。该催化剂还可以重复使用至少 10 次反应，而不会失去其催化活性和选择性。
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