Schumacher, Leon ; Ziemba, Marc ; Brunnengräber, Kai ; Totzauer, Lea Marie ; Hofmann, Kathrin ; Etzold, Bastian J. M. ; Albert, Barbara ; Hess, Christian (2023)
Understanding the reduction behavior of VOx/CeO2 on a molecular level: combining temperature-programmed reduction with multiple in-situ spectroscopies and x-ray diffraction.
In: The Journal of Physical Chemistry C, 127 (12)
doi: 10.1021/acs.jpcc.3c00622
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
As catalytic processes become more important in academic and industrial applications, an intimate understanding is highly desirable to improve their efficiency on a rational basis. Because thorough mechanistic investigations require an elaborate and expensive spectroscopic and theoretical analysis, it is a major goal to link mechanistic insights to simple descriptors, such as the reducibility, that are accessible by temperature-programmed reduction (TPR) experiments, to bridge the gap between fundamental understanding and application of catalysts. In this work, we present a detailed in-situ spectroscopic analysis of TPR results from loading-dependent VOx/CeO2 catalysts, using in-situ multiwavelength Raman, IR, UV–vis, and quasi-in-situ X-ray photoelectron spectroscopy as well as in-situ X-ray diffraction. The catalyst reduction shows a complex network of different processes, contributing to the overall reducibility, which are controlled by the unique interaction at the vanadia–ceria interface. The temperatures at which they occur depend significantly on the nuclearity of the surface vanadia species. By elucidating the temperature- and vanadia loading-dependent behavior, we provide a fundamental understanding of the underlying molecular processes, thus developing an important basis for interpretation of the reduction behavior of other oxide catalysts
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Schumacher, Leon ; Ziemba, Marc ; Brunnengräber, Kai ; Totzauer, Lea Marie ; Hofmann, Kathrin ; Etzold, Bastian J. M. ; Albert, Barbara ; Hess, Christian |
| Art des Eintrags: | Bibliographie |
| Titel: | Understanding the reduction behavior of VOx/CeO2 on a molecular level: combining temperature-programmed reduction with multiple in-situ spectroscopies and x-ray diffraction |
| Sprache: | Englisch |
| Publikationsjahr: | 20 März 2023 |
| Ort: | Washington, DC |
| Verlag: | ACS Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The Journal of Physical Chemistry C |
| Jahrgang/Volume einer Zeitschrift: | 127 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1021/acs.jpcc.3c00622 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | As catalytic processes become more important in academic and industrial applications, an intimate understanding is highly desirable to improve their efficiency on a rational basis. Because thorough mechanistic investigations require an elaborate and expensive spectroscopic and theoretical analysis, it is a major goal to link mechanistic insights to simple descriptors, such as the reducibility, that are accessible by temperature-programmed reduction (TPR) experiments, to bridge the gap between fundamental understanding and application of catalysts. In this work, we present a detailed in-situ spectroscopic analysis of TPR results from loading-dependent VOx/CeO2 catalysts, using in-situ multiwavelength Raman, IR, UV–vis, and quasi-in-situ X-ray photoelectron spectroscopy as well as in-situ X-ray diffraction. The catalyst reduction shows a complex network of different processes, contributing to the overall reducibility, which are controlled by the unique interaction at the vanadia–ceria interface. The temperatures at which they occur depend significantly on the nuclearity of the surface vanadia species. By elucidating the temperature- and vanadia loading-dependent behavior, we provide a fundamental understanding of the underlying molecular processes, thus developing an important basis for interpretation of the reduction behavior of other oxide catalysts |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 31 Mai 2023 11:27 |
| Letzte Änderung: | 09 Dez 2024 12:44 |
| PPN: | 508205239 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Understanding the Reduction Behavior of VOₓ/CeO₂ on a Molecular Level: Combining Temperature-Programmed Reduction with Multiple In Situ Spectroscopies and X-Ray Diffraction. (deposited 06 Dez 2024 13:30)
- Understanding the reduction behavior of VOx/CeO2 on a molecular level: combining temperature-programmed reduction with multiple in-situ spectroscopies and x-ray diffraction. (deposited 31 Mai 2023 11:27) [Gegenwärtig angezeigt]
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