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Pt–Ba–Al2O3 for NOx storage and reduction: Characterization of the dispersed species

Paper ID Volume ID Publish Year Pages File Format Full-Text
48236 46497 2008 12 PDF Available
Title
Pt–Ba–Al2O3 for NOx storage and reduction: Characterization of the dispersed species
Abstract

Pt–Ba–Al2O3 active and selective for NOx storage and selective reduction to N2 has been prepared and tested. Characterization of the parent Al2O3, Pt–Al2O3 and Ba–Al2O3 materials, as well as of Pt–Ba–Al2O3 catalyst in the oxidized, reduced and sulphated state has been performed by FT-IR spectroscopy of low-temperature adsorbed carbon monoxide and of adsorbed acetonitrile. XRD, TEM and XPS analyses have also been performed. Evidence for the predominance of Ba species, which are highly dispersed on the alumina support surface, and may be carbonated or sulphated, has been provided. Competitive interaction of Pt and Ba species with the surface sites of alumina has also been found.

Keywords
NOx storage and reduction; Pt–Ba–Al2O3 catalysts; IR spectroscopy; CO adsorption; TEM Pt–Ba–Al2O3; XPS Pt–Ba–Al2O3; Sulfation NSR catalysts
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Pt–Ba–Al2O3 for NOx storage and reduction: Characterization of the dispersed species
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 80, Issues 3–4, 8 May 2008, Pages 214–225
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
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100% Money Back Guarantee
Full-text PDF Download
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