Ruthenium Nanoparticles Intercalated in Hectorite: A Reusable Hydrogenation Catalyst for Benzene and Toluene |
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| Authors: | Georg Süss-Fink Birgit Mollwitz Bruno Therrien Massoud Dadras Gabor Laurenczy Annette Meister Götz Meister |
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| Institution: | 1.Institut de Chimie,Université de Neuchatel,Neuchatel,Switzerland;2.Institut de Microtechnique,Université de Neuchatel,Neuchatel,Switzerland;3.Institut des Sciences et Ingénierie Chimiques,Ecole Polytechnique Fédérale,Lausanne,Switzerland;4.Institut für Physikalische Chemie,Martin-Luther-Universit?t Halle-Wittenberg,Halle,Germany;5.Fachgruppe Landschafts?kologie,Unabh?ngiges Institut für Umweltfragen,Halle,Germany |
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| Abstract: | The cationic organometallic aqua complexes formed by hydrolysis of (C6H6)RuCl2]2 in water, mainly (C6H6)Ru(H2O)3]2+, intercalate into sodium hectorite by ion exchange, replacing the sodium cations between the anionic silicate layers. The
yellow hectorite thus obtained reacts in ethanol with molecular hydrogen (50 bar, 100°C) with decomposition of the organometallic
aqua complexes to give a black material, in which ruthenium(0) nanoparticles (9–18 nm) are intercalated between the anionic
silicate layers, the charges of which being balanced by hydronium cations. The black ruthenium-modified hectorite efficiently
catalyses the hydrogenation of benzene and toluene in ethanol (50 bar H2, 50°C), the turnover frequencies attaining 7000 catalytic cycles per hour.
Dedicated to Professor Günter Schmid, pioneer of nanocluster chemistry, on the occasion of his 70th birthday |
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| Keywords: | Ruthenium nanoparticles ruthenium-modified hectorite benzene hydrogenation |
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