Schumacher, Leon ; Shen, Jun ; Hofmann, Kathrin ; Hess, Christian (2025)
Rational Design of Vanadia-Based Propane ODH Catalysts: A Multiple Operando Spectroscopic Investigation of VOₓ/TiO₂/CeO₂.
In: Catalysis Today, 2023, 426
doi: 10.26083/tuprints-00028224
Artikel, Zweitveröffentlichung, Postprint
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
The understanding of reaction mechanisms of supported metal oxide catalysts has significantly increased over the last years due to new methods being applied. This increased knowledge allows to develop approaches towards catalytic materials for reactions with low selectivities by rational design, such as the oxidative dehydrogenation (ODH) of propane, which is of great technical importance. Vanadia (VOₓ) supported on reducible oxides (TiO₂, CeO₂, etc.) has shown promising catalytic properties in propane ODH. In this study, we followed a rational-design approach employing atomic layer deposition (ALD) to synthesize a VOₓ/TiOₓ/CeO₂ catalyst with superior selectivity, by combining favourable properties of the individual catalysts (VOₓ/TiO₂, VOₓ/CeO₂). By applying multiple spectroscopies, including multi-wavelength Raman, UV-Vis, DRIFT, and XP spectroscopy as well as XRD, we were able to identify the functions of each oxide and develop a mechanistic picture. The increased selectivity is the result of distinct interactions between the oxides that slow down the oxygen dynamics in the catalyst and favour reaction pathways beneficial to propylene formation. Our findings highlight the use of rational design to develop improved catalysts based on previously established mechanistic knowledge.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2025 |
| Autor(en): | Schumacher, Leon ; Shen, Jun ; Hofmann, Kathrin ; Hess, Christian |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Rational Design of Vanadia-Based Propane ODH Catalysts: A Multiple Operando Spectroscopic Investigation of VOₓ/TiO₂/CeO₂ |
| Sprache: | Englisch |
| Publikationsjahr: | 23 September 2025 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 23 September 2023 |
| Ort der Erstveröffentlichung: | Amsterdam |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Catalysis Today |
| Jahrgang/Volume einer Zeitschrift: | 426 |
| Kollation: | 47 Seiten |
| DOI: | 10.26083/tuprints-00028224 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28224 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | The understanding of reaction mechanisms of supported metal oxide catalysts has significantly increased over the last years due to new methods being applied. This increased knowledge allows to develop approaches towards catalytic materials for reactions with low selectivities by rational design, such as the oxidative dehydrogenation (ODH) of propane, which is of great technical importance. Vanadia (VOₓ) supported on reducible oxides (TiO₂, CeO₂, etc.) has shown promising catalytic properties in propane ODH. In this study, we followed a rational-design approach employing atomic layer deposition (ALD) to synthesize a VOₓ/TiOₓ/CeO₂ catalyst with superior selectivity, by combining favourable properties of the individual catalysts (VOₓ/TiO₂, VOₓ/CeO₂). By applying multiple spectroscopies, including multi-wavelength Raman, UV-Vis, DRIFT, and XP spectroscopy as well as XRD, we were able to identify the functions of each oxide and develop a mechanistic picture. The increased selectivity is the result of distinct interactions between the oxides that slow down the oxygen dynamics in the catalyst and favour reaction pathways beneficial to propylene formation. Our findings highlight the use of rational design to develop improved catalysts based on previously established mechanistic knowledge. |
| Freie Schlagworte: | Vanadia, Titania, Ceria, Rational Design, Operando Spectroscopy, Propane ODH |
| Status: | Postprint |
| URN: | urn:nbn:de:tuda-tuprints-282243 |
| 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: | 06 Dez 2024 13:36 |
| Letzte Änderung: | 09 Dez 2024 12:39 |
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- Rational Design of Vanadia-Based Propane ODH Catalysts: A Multiple Operando Spectroscopic Investigation of VOₓ/TiO₂/CeO₂. (deposited 06 Dez 2024 13:36) [Gegenwärtig angezeigt]
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