Walter, Anke ; Herbert, Rita ; Hess, Christian ; Ressler, Thorsten (2024)
Structural characterization of vanadium oxide catalysts supported on nanostructured silica SBA-15 using X-ray absorption spectroscopy.
In: Chemistry Central Journal, 2010, 4 (1)
doi: 10.26083/tuprints-00026777
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
The local structure of vanadium oxide supported on nanostructured SiO₂ (VₓOᵧ/SBA-15) was investigated by in situ X-ray absorption spectroscopy (XAS). Because the number of potential parameters in XAS data analysis often exceeds the number of "independent" parameters, evaluating the reliability and significance of a particular fitting procedure is mandatory. The number of independent parameters (Nyquist) may not be sufficient. Hence, in addition to the number of independent parameters, a novel approach to evaluate the significance of structural fitting parameters in XAS data analysis is introduced. Three samples with different V loadings (i.e. 2.7 wt %, 5.4 wt %, and 10.8 wt %) were employed. Thermal treatment in air at 623 K resulted in characteristic structural changes of the V oxide species. Independent of the V loading, the local structure around V centers in dehydrated VₓOᵧ/SBA-15 corresponded to an ordered arrangement of adjacent V₂O₇ units. Moreover, the V₂O₇ units were found to persist under selective oxidation reaction conditions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Walter, Anke ; Herbert, Rita ; Hess, Christian ; Ressler, Thorsten |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Structural characterization of vanadium oxide catalysts supported on nanostructured silica SBA-15 using X-ray absorption spectroscopy |
| Sprache: | Englisch |
| Publikationsjahr: | 23 April 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2010 |
| Ort der Erstveröffentlichung: | London |
| Verlag: | Springer Nature |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Chemistry Central Journal |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 1 |
| Kollation: | 20 Seiten |
| DOI: | 10.26083/tuprints-00026777 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/26777 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | The local structure of vanadium oxide supported on nanostructured SiO₂ (VₓOᵧ/SBA-15) was investigated by in situ X-ray absorption spectroscopy (XAS). Because the number of potential parameters in XAS data analysis often exceeds the number of "independent" parameters, evaluating the reliability and significance of a particular fitting procedure is mandatory. The number of independent parameters (Nyquist) may not be sufficient. Hence, in addition to the number of independent parameters, a novel approach to evaluate the significance of structural fitting parameters in XAS data analysis is introduced. Three samples with different V loadings (i.e. 2.7 wt %, 5.4 wt %, and 10.8 wt %) were employed. Thermal treatment in air at 623 K resulted in characteristic structural changes of the V oxide species. Independent of the V loading, the local structure around V centers in dehydrated VₓOᵧ/SBA-15 corresponded to an ordered arrangement of adjacent V₂O₇ units. Moreover, the V₂O₇ units were found to persist under selective oxidation reaction conditions. |
| ID-Nummer: | Artikel-ID: 3 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-267775 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 23 Apr 2024 08:43 |
| Letzte Änderung: | 24 Apr 2024 09:59 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Structural characterization of vanadium oxide catalysts supported on nanostructured silica SBA-15 using X-ray absorption spectroscopy. (deposited 23 Apr 2024 08:43) [Gegenwärtig angezeigt]
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