Highly active heterogeneous hydrogenation catalysts prepared from cobalt complexes and rice husk waste
作者:Felix Unglaube、Janina Schlapp、Antje Quade、Jan Schäfer、Esteban Mejía
DOI:10.1039/d2cy00005a
日期:——
the hydrogenation of nitro groups in aromatic and aliphatic substrates. A remarkable selectivity towards nitro groups was found in the presence of various reactive functionalities, including halogens, carbonyls, borates, and nitriles. Apart from their excellent activity and selectivity, these catalysts showed remarkable stability, allowing their easy recovery and multiple reuse without requiring re-activation
农业废弃物的利用和增值是实施可持续经济以减少人类活动在地球上的环境足迹的关键战略。这项工作描述了使用来自农业废弃物的稻壳 (RH) 来制备用于还原硝基化合物的高活性催化剂。RH 用各种带有 N 供体配体的钴复合物浸渍,然后热解并用碱蚀刻所得复合物以去除二氧化硅域。采用IR、AAS、ICP-OES、XRD、BET、XPS和SEM等技术对制备材料的组成和形貌进行了研究。该材料在芳香族和脂肪族底物的硝基氢化中表现出优异的活性和选择性。在各种反应性官能团(包括卤素、羰基、硼酸盐和腈)的存在下,发现了对硝基的显着选择性。除了出色的活性和选择性外,这些催化剂还表现出显着的稳定性,使其易于回收和多次重复使用,无需重新活化。