bei Google ScholarTitelangaben
Meunier, Frederic C. ; Cardenas, Luis ; Kaper, Helena ; Šmíd, Břetislav ; Vorokhta, Mykhailo ; Grosjean, Rémi ; Aubert, Daniel ; Dembélé, Kassiogé ; Lunkenbein, Thomas:
Synergy between Metallic and Oxidized Pt Sites Unravelled during Room Temperature CO Oxidation on Pt/Ceria.
In: Angewandte Chemie International Edition.
Bd. 60
(2021)
Heft 7
.
- S. 3799-3805.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.202013223
Abstract
Pt-based materials are widely used as heterogeneous catalysts, in particular for pollutant removal applications. The state of Pt has often been proposed to differ depending on experimental conditions, for example, metallic Pt poisoned with CO being present at lower temperature before light-off, while an oxidized Pt surface prevails above light-off temperature. In stark contrast to all previous reports, we show herein that both metallic and oxidized Pt are present in similar proportions under reaction conditions at the surface of ca. 1 nm nanoparticles showing high activity at 30 degrees C. The simultaneous presence of metallic and oxidized Pt enables a synergy between these phases. The main role of the metallic Pt phase is to provide strong adsorption sites for CO, while that of oxidized Pt supposedly supplies reactive oxygen. Our results emphasize the complex dual oxidic-metallic nature of supported Pt catalysts and platinum's evolving nature under reaction conditions.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000598329500001 |
| 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 05:56 |
| Letzte Änderung: | 13 Jun 2025 05:56 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93692 |