at Google ScholarTitle data
Erdem, Ezgi ; Tarasov, Andrey V. ; Kube, Pierre ; Koch, Gregor ; Plodinec, Milivoj ; Lunkenbein, Thomas ; Carey, Spencer ; Wang, Yuanqing ; Hävecker, Michael ; Rosowski, Frank ; Schlögl, Robert ; Trunschke, Annette:
The Influence of Melting on Catalysis in Propane Oxidation.
In: ChemCatChem.
Vol. 16
(2024)
Issue 3
.
- e202301242.
ISSN 1867-3899
DOI: https://doi.org/10.1002/cctc.202301242
Abstract in another language
A model catalyst composed of crystalline potassium pentavanadate (K3V5O14) supported on silica was studied to elucidate the effect of phase transitions on the performance of potassium-promoted vanadia catalysts in propane oxidation. Operando calorimetry shows a clear correlation between a drop in activity and an increase in selectivity to propylene upon melting of the crystalline K3V5O14 phase under reaction conditions. The pentavanadate phase itself is not active in propane oxidation, neither in the solid nor in the molten state. The activity of the catalyst mainly originates from highly-active, i. e., unselective VxOy surface species anchored to silica and formed during synthesis in addition to the supported pentavanadate phase. Melting of K3V5O14 leads to the coverage of these VxOy species preventing the overoxidation of propylene and leading to an increase in propylene selectivity. The change in catalyst properties is therefore due to a physical effect and not to a change in the chemical properties of the predominant crystalline phase.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:001142694500001 |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage > Chair Operando-Analytics of Electrochemical Energy Storage - Univ.-Prof. Dr. Thomas Lunkenbein |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 12 Jun 2025 08:10 |
| Last Modified: | 04 Jul 2025 11:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93665 |