Recyclable cobalt(0) nanoparticle catalysts for hydrogenations
Recyclable cobalt(0) nanoparticle catalysts for hydrogenations
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DOI：
10.1039/c8cy00595h
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发表时间：
2018-05-21
影响因子：
5
通讯作者：
Wolf, Robert
中科院分区：
文献类型：
--
作者：
Bueschelberger, Philipp;Reyes-Rodriguez, Efrain;Wolf, Robert
寻找替代贵金属的新加氢催化剂主要是由可持续性问题和3d过渡金属的独特机理特征驱动的。据报道，在还原剂存在下或在高温条件下，钴前体和特定配体的几种组合提供了活性氢化催化剂。本研究报告了一种在不存在配体或表面活性剂的情况下通过还原商业CoCl 2制备小的单分散Co（0）纳米颗粒（3-4 nm）的新方法。在烯烃、炔、亚胺和杂芳烃的氢化中观察到高催化活性（2-20巴H-2）。磁性使催化剂分离和多次回收成为可能。
The search for new hydrogenation catalysts that replace noble metals is largely driven by sustainability concerns and the distinct mechanistic features of 3d transition metals. Several combinations of cobalt precursors and specific ligands in the presence of reductants or under high-thermal conditions were reported to provide active hydrogenation catalysts. This study reports a new method of preparation of small, monodisperse Co(0) nanoparticles (3-4 nm) from the reduction of commercial CoCl2 in the absence of ligands or surfactants. High catalytic activity was observed in hydrogenations of alkenes, alkynes, imines, and heteroarenes (2-20 bar H-2). The magnetic properties enabled catalyst separation and multiple recyclings.