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Fe-based N-doped dendritic catalysts for catalytic ammoxidation of aromatic aldehydes to aromatic nitriles.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-02 , DOI: 10.1016/j.jcis.2019.12.133
Hong Zhao 1 , Xun Sun 2 , Dan Xu 1 , Qian Zhu 1 , Yangyang Zhu 1 , Zhengping Dong 1
Affiliation  

Non-noble-metal-based catalysts for catalyzing the oxidative coupling of aldehydes and ammonia represent an efficient atom-economical synthetic route to produce nitriles. In this study, an effective Fe-modified N-doped carbon catalyst anchored on fibrous silica nanospheres (Fe-N/KCC-1-T) was successfully prepared by a facile strategy. 1,10-Phenanthroline with a strong chelating ability ensured the homogeneous, ultrafine distribution of Fe-based active sites, and the KCC-1 support material effectively enhanced the accessibility to these active sites, which corresponded to center-radial pore channels and a high surface area. As-fabricated Fe-N/KCC-1-T exhibited excellent catalytic performance for the ammoxidation of aldehydes under mild reaction conditions. A series of functionalized aldehydes were efficiently oxidized into the corresponding nitriles by using air as the green oxidant. Moreover, the catalyst was recycled for at least five runs without any clear decrease in the performance. Hence, this study is expected to provide an eco-friendly synthetic route to produce nitriles from easily available aldehydes and ammonia by using a cost-effective catalyst.

中文翻译:

铁基氮掺杂树枝状催化剂,用于芳族醛催化氨氧化为芳族腈。

用于催化醛和氨的氧化偶联的非贵金属基催化剂代表了生产腈的有效的原子经济合成路线。在这项研究中,通过一种简便的策略成功地制备了一种锚固在纤维状二氧化硅纳米球上的有效的铁改性的氮掺杂碳催化剂(Fe-N / KCC-1-T)。1,10-邻菲咯啉具有很强的螯合能力,确保了铁基活性位点的均匀,超细分布,而KCC-1载体材料有效地增强了对这些活性位点的可及性,这对应于中心径向的孔道和较高的表面积。制成的Fe-N / KCC-1-T在温和的反应条件下对醛的氨氧化反应表现出优异的催化性能。通过使用空气作为绿色氧化剂,将一系列官能化的醛有效地氧化为相应的腈。而且,催化剂被循环至少五次运行而性能没有明显降低。因此,预期该研究将提供一种生态友好的合成路线,通过使用经济高效的催化剂,由易于获得的醛和氨生产腈。
更新日期:2020-01-02
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