Monodispersed and Stable Nano Copper(0) from Copper‐ Aluminium Hydrotalcite: Importance in CC Couplings of Deactivated Aryl Chlorides

Abstract

Abstract A simple one‐step approach for the preparation of highly monodispersed nano copper(0) stabilized on alumina [Cu(0)/Al 2 O 3 ] by thermal reduction of copper‐aluminium hydrotalcite (Cu‐Al HT) under a hydrogen atmosphere is described. The transformation of Cu‐Al HT to Cu(0)/Al 2 O 3 occurrs via dehydroxylation of divalent and trivalent metal hydroxides and decarboxylation of carbonate anions present in the interlayers of hydrotalcite, as confirmed by XPS, XANES, XRD and TEM analysis. Cu(0)/Al 2 O 3 nano composites were used as an efficient catalyst in the CC coupling of deactivated aryl chlorides. The high efficiency and reusability exhibited by Cu(0)/Al 2 O 3 outline its potential as an alternative over traditional noble metal‐based catalysts in CC coupling reactions.