title: Hydrogenation of p-chloronitrobenzene over nanostructured-carbon-supported ruthenium catalysts.
abstract: Carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have been used for the first time to support ruthenium nanoparticles for the hydrogenation of p-chloronitrobenzene (p-CNB) to produce selectively p-chloroaniline. The preparation of well-dispersed ruthenium catalysts from the [Ru(3)(CO)(12)] precursor required activation of the purified supports by nitric acid oxidation. The supports, purified and functionalized, and the supported catalysts have been characterized by a range of techniques. The catalytic activity of these materials for the hydrogenation of p-CNB at 35 bar and 60 °C is shown to reach as high as 18 mol(p-CNB)g(Ru)(-1) h(-1), which is one order of magnitude higher than a commercial Ru/Al(2)O(3) catalyst. Selectivities between 92 and 94 % are systematically obtained, the major byproduct being aniline.
authors.affiliation: Laboratoire de Chimie de Coordination UPR CNRS 8241 composante ENSIACET, Université de Toulouse UPS-INP-LCC, Toulouse, France.
authors.forename: Mustapha
authors.initials: M
authors.lastname: Oubenali
authors.forename: Giuditta
authors.initials: G
authors.lastname: Vanucci
authors.forename: Bruno
authors.initials: B
authors.lastname: Machado
authors.forename: Mohammed
authors.initials: M
authors.lastname: Kacimi
authors.forename: Mahfoud
authors.initials: M
authors.lastname: Ziyad
authors.forename: Joaquim
authors.initials: J
authors.lastname: Faria
authors.forename: Anna
authors.initials: A
authors.lastname: Raspolli-Galetti
authors.forename: Philippe
authors.initials: P
authors.lastname: Serp
mesh_terms: D002384:Catalysis; D055772:Green Chemistry Technology; D006865:Hydrogenation; D057139:Nanofibers / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009578:Nitrobenzenes / Q000737:chemistry*; D011312:Pressure; D012428:Ruthenium / Q000737:chemistry*; D013696:Temperature
chemical_list: D037742:Nanotubes, Carbon; D009578:Nitrobenzenes; D012428:Ruthenium; C010407:4-chloronitrobenzene