Ziemba, Marc ; Ganduglia-Pirovano, M. Verónica ; Hess, Christian (2020)
Elucidating the oxygen storage-release dynamics in ceria nanorods by combined multi-wavelength Raman spectroscopy and DFT.
In: The Journal of Physical Chemistry Letters, 11 (20)
doi: 10.1021/acs.jpclett.0c02607
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The oxygen storage-release dynamics in ceria nanorods is elucidated by using a combination of in situ multi-wavelength Raman spectroscopy and density functional theory calculations. Ceria nanorods exposing CeO₂(100) and CeO₂(110) facets are shown to be characterized by highly facet-dependent properties regarding molecular oxygen activation and decomposition as well as lattice oxygen dynamics. Temperature-dependent Raman results show that oxygen is stored in the form of peroxide species on the (100) facets, which are then released as gaseous oxygen, whereas lattice oxygen is involved with the (110) facets. On the latter, peroxide species first decompose into oxygen atoms that heal vacant lattice oxygen sites before being released as gaseous oxygen. The exposure of different facets makes ceria nanorods an interesting material for catalytic applications, because they allow the use of a mixture of oxygen storage-release functions, as well as their synergistic interactions, in a single system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Ziemba, Marc ; Ganduglia-Pirovano, M. Verónica ; Hess, Christian |
| Art des Eintrags: | Bibliographie |
| Titel: | Elucidating the oxygen storage-release dynamics in ceria nanorods by combined multi-wavelength Raman spectroscopy and DFT |
| Sprache: | Englisch |
| Publikationsjahr: | September 2020 |
| Verlag: | American Chemical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The Journal of Physical Chemistry Letters |
| Jahrgang/Volume einer Zeitschrift: | 11 |
| (Heft-)Nummer: | 20 |
| DOI: | 10.1021/acs.jpclett.0c02607 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The oxygen storage-release dynamics in ceria nanorods is elucidated by using a combination of in situ multi-wavelength Raman spectroscopy and density functional theory calculations. Ceria nanorods exposing CeO₂(100) and CeO₂(110) facets are shown to be characterized by highly facet-dependent properties regarding molecular oxygen activation and decomposition as well as lattice oxygen dynamics. Temperature-dependent Raman results show that oxygen is stored in the form of peroxide species on the (100) facets, which are then released as gaseous oxygen, whereas lattice oxygen is involved with the (110) facets. On the latter, peroxide species first decompose into oxygen atoms that heal vacant lattice oxygen sites before being released as gaseous oxygen. The exposure of different facets makes ceria nanorods an interesting material for catalytic applications, because they allow the use of a mixture of oxygen storage-release functions, as well as their synergistic interactions, in a single system. |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie Zentrale Einrichtungen Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner |
| Hinterlegungsdatum: | 30 Sep 2020 06:36 |
| Letzte Änderung: | 30 Okt 2024 09:04 |
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Elucidating the Oxygen Storage-Release Dynamics in Ceria Nanorods by Combined Multi-Wavelength Raman Spectroscopy and DFT. (deposited 29 Okt 2024 13:48)
- Elucidating the oxygen storage-release dynamics in ceria nanorods by combined multi-wavelength Raman spectroscopy and DFT. (deposited 30 Sep 2020 06:36) [Gegenwärtig angezeigt]
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