Recyclable cobalt(0) nanoparticle catalysts for hydrogenations
作者:Philipp Büschelberger、Efrain Reyes-Rodriguez、Christian Schöttle、Jens Treptow、Claus Feldmann、Axel Jacobi von Wangelin、Robert Wolf
DOI:10.1039/c8cy00595h
日期:——
The search for new hydrogenationcatalysts 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 activehydrogenationcatalysts. This study reports a new method of preparation
寻找替代贵金属的新型加氢催化剂的主要原因是对可持续性的关注以及3d过渡金属的独特机械特性。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可提供活性加氢催化剂。这项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,炔烃,亚胺和杂芳烃(2–20 bar H 2)的氢化中观察到高催化活性。磁性使催化剂分离和多次回收成为可能。
A Manganese Nanosheet: New Cluster Topology and Catalysis
作者:Uttam Chakraborty、Efrain Reyes-Rodriguez、Serhiy Demeshko、Franc Meyer、Axel Jacobi von Wangelin
DOI:10.1002/anie.201800079
日期:2018.4.23
and the surface characteristics of larger metal particles are well understood, preparations of molecular metallic nanoclusters remain a great challenge. Discrete planar metal clusters constitute nanoscale snapshots of cluster growth but are especially rare owing to the strong preference for three‐dimensional structures and rapid aggregation or decomposition. A simple ligand‐exchange procedure has led
A Simple and Inexpensive Method for the Preparation of Imines and Azadienes
作者:A. Saoudi、A. Benguedach、H. Benhaoua
DOI:10.1080/00397919508015438
日期:1995.8
Abstract A number of imines and azadienes were prepared in high yield and good purity by using the condensation reactions of various aldehydes and ketones with amines over natural Algerian bentonite.