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In situ infrared spectroscopy on the gas phase hydrogenation of nitrobenzene

Paper ID Volume ID Publish Year Pages File Format Full-Text
49974 46775 2012 5 PDF Available
Title
In situ infrared spectroscopy on the gas phase hydrogenation of nitrobenzene
Abstract

The gas phase hydrogenation of nitrobenzene over gold nanoparticles supported on titania and alumina was investigated by in situ infrared spectroscopy. Adsorption and reduction of nitrobenzene readily proceeded on both catalysts, and aniline remained adsorbed on the catalyst. On titania, decreasing amounts of nitrobenzene adsorb in each cycle. Adsorption was found to occur through hydrogen-bonding interactions with surface hydroxyl groups on both supports. In the presence of aniline, nitrobenzene adsorbs on other sites on titania, as it is not able to displace aniline from hydroxyl sites. On alumina, nitrobenzene displaces some aniline from the surface hydroxyl groups. Nitrobenzene and aniline thus compete, at least in part, for the same sites on alumina, but not on titania.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Reduction of nitrobenzene over gold-catalysts was monitored by IR spectroscopy. ► Adsorption–reaction cycling was used to investigate different supports. ► Nitrobenzene initially adsorbs on surface hydroxyl groups. ► On alumina, but not titania, nitrobenzene can displace aniline from surface hydroxyls.

Keywords
In situ infrared spectroscopy; Hydrogenation; Nitrobenzene; Aniline; Alumina-supported gold catalysts; Titania-supported gold catalysts
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In situ infrared spectroscopy on the gas phase hydrogenation of nitrobenzene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 83–87
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us