Catalytic Hydrogen Production by Ruthenium Complexes from the Conversion of Primary Amines to Nitriles: Potential Application as a Liquid Organic Hydrogen Carrier
作者:David Ventura-Espinosa、Aida Marzá-Beltrán、Jose A. Mata
DOI:10.1002/chem.201603423
日期:2016.12.5
The potential application of the primary amine/nitrile pair as a liquid organic hydrogen carrier (LOHC) has been evaluated. Ruthenium complexes of formula [(p‐cym)Ru(NHC)Cl2] (NHC=N‐heterocyclic carbene) catalyze the acceptorless dehydrogenation of primary amines to nitriles with the formation of molecular hydrogen. Notably, the reaction proceeds without any external additive, under air, and under
已经评估了伯胺/腈对作为液态有机氢载体(LOHC)的潜在应用。式[(p -cym)Ru(NHC)Cl 2的钌配合物](NHC = N-杂环卡宾)催化伯胺的无受主脱氢为腈,并形成分子氢。值得注意的是,在空气和温和的反应条件下,反应在没有任何外部添加剂的情况下进行。为了再利用,已经研究了负载在石墨烯表面上的钌配合物的催化性能。钌负载的催化剂至少可以运行10次,而活性没有明显下降。在催化活性,稳定性和可循环性方面获得的结果对于胺/腈对作为LOHC的潜在应用是令人鼓舞的。苄胺脱氢的主要挑战是选择性控制,例如避免由于氨基转移反应而形成亚胺副产物。在此处,通过使用长链伯胺(例如十二烷基胺)实现了选择性。已经进行了机理研究以使涉及胺脱氢中的催化剂的活性和选择性的关键因素合理化。实验结果表明,催化剂的静止状态含有配位胺。