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Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias

Paper ID Volume ID Publish Year Pages File Format Full-Text
52743 46885 2007 6 PDF Available
Title
Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias
Abstract

The acidity of three related sulfated zirconias has been compared by IR spectroscopy using CO and H2 as probe molecules. The parent material (SZ) was obtained by calcination of a commercial sulfated zirconium hydroxide. The other two samples, SZ-WW and SZ-SO3, were obtained from SZ by water washing and by sulfation with gaseous SO3, respectively. The labile sulfate groups responsible for alkane activation and associated with an IR band at 1406 cm−1 are removed by water washing and increased by SO3-sulfation. No remarkable differences in the strength of either Lewis or Brønsted acid sites have been observed between SZ and SZ-SO3. Water washing strongly weakens Brønsted acidity but only slightly weakens Lewis acidity.

Keywords
Sulfated zirconia; Acidity; FTIR characterization; H2 as probe molecule; CO as a probe molecule
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Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 865–870
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
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