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Hydrous zirconia supported iridium nanoparticles: An excellent catalyst for the hydrogenation of haloaromatic nitro compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
51665 46849 2010 5 PDF Available
Title
Hydrous zirconia supported iridium nanoparticles: An excellent catalyst for the hydrogenation of haloaromatic nitro compounds
Abstract

Ir/ZrO2·xH2O was prepared by co-precipitation and characterized by TEM, XRD, and XPS. It showed an excellent catalytic performance for the hydrogenation of haloaromatic nitro compounds to the corresponding amines in the mixture solvent of ethanol and water. The catalyst gave both conversion and selectivity to be over 99.9% for the hydrogenation of p-chloronitrobenzene to p-chloroaniline. Besides the intrinsic characterization of iridium in the hydrogenation of haloaromatic nitro compounds, the high activity and selectivity of Ir/ZrO2·xH2O is probably attributed to the formation of hydrogen bond between substrate and the hydroxyl groups on the surface of the hydrous catalyst or solvent water to activate the NO bond in nitro group. The activated NO bond is easy to be attacked by the activated hydrogen, so the hydrogenation is promoted.

Keywords
Iridium; Hydrous zirconia; Aromatic nitro compound; Hydrogenation
First Page Preview
Hydrous zirconia supported iridium nanoparticles: An excellent catalyst for the hydrogenation of haloaromatic nitro compounds
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 5, 25 January 2010, Pages 451–455
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis