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New insights into the development of Brønsted acidity of niobic acid

Paper ID Volume ID Publish Year Pages File Format Full-Text
55164 47042 2012 7 PDF Available
Title
New insights into the development of Brønsted acidity of niobic acid
Abstract

The development of Brønsted acidity and the relationship between acidity, catalytic performance and structure of niobium oxide were investigated for a series of samples prepared by calcination of niobic acid at temperatures between 423 and 823 K. All solids were active for propan-2-ol dehydration. The Brønsted acidity was monitored by adsorption of lutidine and CO followed by FT-IR. Low temperature CO adsorption measurements showed that all solids exhibit essentially the same medium Brønsted acid strength. A direct relationship between the abundance of Brønsted acid sites monitored by lutidine adsorption followed by desorption at 523 K and propan-2-ol dehydration activity was observed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (145 K)Download as PowerPoint slideHighlights► Catalysts: niobic acid calcined at different temperatures. ► Acid catalyzed reaction test: propanol dehydration activity. ► Brønsted acidity as a function of the calcination temperature. ► All solids exhibit similar medium Brønsted acid strength. ► Direct relationship between the abundance of Brønsted acid sites and activity.

Keywords
Niobium oxide; Niobic acid; Brønsted acidity; Isopropanol dehydration; Correlation acidity–activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 192, Issue 1, 30 September 2012, Pages 123–129
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
Any Questions? feel free to contact us