| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 55164 | Catalysis Today | 2012 | 7 Pages |
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.
