NDLI: Shape- and Size-Selective Preparation of Hectorite-Supported Ruthenium Nanoparticles for the Catalytic Hydrogenation of Benzene

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Journal of Cluster Science : Volume 20, Issue 1, March 2009

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Shape- and Size-Selective Preparation of Hectorite-Supported Ruthenium Nanoparticles for the Catalytic Hydrogenation of Benzene

Content Provider	Springer Nature Link
Author	Süss Fink, Georg Khan, Farooq Ahmad Boudon, Julien Spassov, Vladislav
Copyright Year	2009
Abstract	The cationic organometallic aqua complexes formed by hydrolysis of [(C$_{6}$H$_{6}$)$_{2}$RuCl$_{2}$]$_{2}$ in water, mainly [(C$_{6}$H$_{6}$)Ru(H$_{2}$O)$_{3}$]$^{2+}$, intercalate into white sodium hectorite, replacing the sodium cations between the anionic silicate layers. The yellow hectorite thus obtained reacts in water with molecular hydrogen (50 bar, 100 °C) to give a dark suspension containing a black hectorite in which large hexagonally shaped ruthenium nanoparticles (20–50 nm) are intercalated between the anionic silicate layers, the charges of which being balanced by hydronium cations. If the reduction with molecular hydrogen (50 bar, 100 °C) is carried out in various alcohols, spherical ruthenium nanoparticles of smaller size (3–38 nm depending on the alcohol) are obtained. In alcohols other than methanol, the reduction also works without H$_{2}$ under reflux conditions, the alcohol itself being the reducing agent; the ruthenium nanoparticles obtained in this case are spherical and small (2–9 nm) but tend to aggregate to form clusters of nanoparticles. Whereas the ruthenium nanoparticles prepared by reduction of the yellow hectorite in refluxing alcohols without hydrogen pressure are almost inactive, the nanoparticles formed by hydrogen reduction catalyze the hydrogenation of benzene to give cyclohexane under mild conditions (50 °C) with turnover frequencies up to 6500 catalytic cycles per hour, the best solvent being ethanol.
Starting Page	341
Ending Page	353
Page Count	13
File Format	PDF
ISSN	10407278
Journal	Journal of Cluster Science
Volume Number	20
Issue Number	2
e-ISSN	15728862
Language	English
Publisher	Springer US
Publisher Date	2009-02-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ruthenium nanoparticles Ruthenium-modified hectorite Benzene hydrogenation Inorganic Chemistry Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Biochemistry Condensed Matter Physics Materials Science

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