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Gatla, Suresh ; Aubert, Daniel ; Agostini, Giovanni ; Mathon, Olivier ; Pascarelli, Sakura ; Lunkenbein, Thomas ; Willinger, Marc Georg ; Kaper, Helena:
Room-Temperature CO Oxidation Catalyst : Low-Temperature Metal-Support Interaction between Platinum Nanoparticles and Nanosized Ceria.
In: ACS Catalysis.
Bd. 6
(2016)
Heft 9
.
- S. 6151-6155.
ISSN 2155-5435
DOI: https://doi.org/10.1021/acscatal.6b00677
Abstract
Platinum nanoparticles dispersed on nanosized ceria are active for CO oxidation at room temperature after hydrogen pretreatment. High angular annular dark field scanning transmission electron microscopy (HAADF-STEM) analysis of the reduced catalyst shows spreading of the 1 nm sized platinum particles under the electron beam, characteristic for a two-dimensional strong metal support interaction. In situ X-ray absorption fluorescence spectroscopy (XAFS) reveals a Pt-O distance of 2.1 angstrom, which is significantly longer than the Pt-O distance in PtO2 (2.0 angstrom). This elongated Pt-O distance can be related to interaction of the platinum species with cerium oxide in the form of a low-temperature active species support interaction. These findings contribute to the general understanding of catalytic systems operating at low temperature.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000382714000058 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 13 Jun 2025 08:32 |
| Letzte Änderung: | 13 Jun 2025 08:32 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93727 |