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Gatla, Suresh ; Aubert, Daniel ; Flaud, Valérie ; Grosjean, Rémi ; Lunkenbein, Thomas ; Mathon, Olivier ; Pascarelli, Sakura ; Kaper, Helena:
Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation.
In: Catalysis Today.
Bd. 333
(2019)
.
- S. 105-112.
ISSN 0920-5861
DOI: https://doi.org/10.1016/j.cattod.2018.06.032
Abstract
Using a simple slow decomposition method of nitrate precursors, high-surface area platinum-doped ceria with a crystallite size of 9 nm can be prepared. The catalytic performance of the compound can be tuned by changing the reduction temperature under hydrogen (300 degrees C, 500 degrees C and 700 degrees C). The catalyst treated at 300 degrees C shows the best catalytic performance, being active at room temperature. The materials were analysed using a combination of structural characterization methods (X-ray diffraction (XRD), nitrogen physisorption, high angle annular dark field scanning transmission electron microscopy (HAADF-STEM)), surface sensitive methods (X-ray photoelectron spectroscopy (XPS), H-2-chemisorption and H-2-temperature-programmed reduction (TPR)) and X-ray absorption fluorescence spectroscopy (XAFS). HAADF-STEM and XAFS analysis suggests successful doping of platinum in the ceria lattice. After pretreatment at 300 degrees C, the situation is slightly different. While no defined platinum nanoparticles can be identified on the surface, some platinum is in a reduced state (XPS, H-2-chemisorption).
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | WOS:000470828100014 |
| Keywords: | CO oxidation; Platinum-cerium oxide catalyst; Platinum-doped cerium oxide; Oxidation state; Heterogeneous catalysis |
| 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: | 12 Jun 2025 13:14 |
| Letzte Änderung: | 12 Jun 2025 13:14 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93708 |