Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes

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Title: Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes
Authors: Dongil, Ana Belén | Rivera-Cárcamo, Camila | Pastor Pérez, Laura | Sepúlveda-Escribano, Antonio | Reyes, Patricio
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Iridium | Graphitic character | Nitrobenzene hydrogenation
Knowledge Area: Química Inorgánica
Issue Date: 1-Jul-2015
Publisher: Elsevier
Citation: Catalysis Today. 2015, 249: 72-78. doi:10.1016/j.cattod.2014.10.034
Abstract: In the present work we have studied the effect of carbon supports with different graphitic character (carbon nanotubes, mesoporous graphite and activated carbon) on the catalytic performance of iridium nanoparticles on the liquid phase chemoselective hydrogenation of para-chloronitrobenzene at room temperature. The effect of the oxygen groups was also evaluated by oxidizing a portion of the carbon nanotubes. The Raman and XRD spectra showed that the mesoporous graphite displayed the strongest graphitic character. The characterization of the catalysts by HR-TEM, XPS and TPR-H2, showed that the catalysts had similar particle size and that the catalysts prepared over the previously oxidized support, Ir/CNTox, was not fully reduced. The activity and selectivity achieved with the catalyst Ir/CNT was the best among the samples and the presence of irdium oxide on Ir/CNTox diminished the yield to p-chloroaniline, being the worse catalyst. The reactivity of different isomers was also studied over Ir/CNT and it followed the order m > o > p.
Sponsor: Authors thank to CONICYT (Chile, FONDECYT 3130483) and Generalitar Valenciana (Spain, PROMETEOII/2014/004–FEDER) for financial support.
ISSN: 0920-5861 (Print) | 1873-4308 (Online)
DOI: 10.1016/j.cattod.2014.10.034
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier B.V.
Peer Review: si
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