Roth, Christina ; Martz, Nathalie ; Fuess, Hartmut (2001)
Characterization of different Pt–Ru catalysts by X-ray diffraction and transmission electron microscopy.
In: Physical Chemistry Chemical Physics, 3 (3)
doi: 10.1039/B004887I
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Carbon-supported Pt-Ru (1 : 1)-catalysts have been synthesized by two reduction methods in an aqueous phase and in a third way in an organic solution and characterized in comparison to a commercial Pt-Ru/C catalyst purchased from E-TEK. X-ray di�raction and transmission electron microscopy were carried out on the di�erent samples in the as-synthesized state and after heat-treatment at 500 °C in nitrogen and air atmospheres respectively. Powder patterns of the di�erent catalysts in the as-synthesized state reveal a fcc pattern with d values matching or close to platinum. No evidence of metallic Ru or any oxide phases was found. After heat-treatment in nitrogen Ru reÑections occur in the synthesized catalyst samples, backing the supposition of separate platinum and ruthenium particles instead of a Pt-Ru alloy.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2001 |
| Autor(en): | Roth, Christina ; Martz, Nathalie ; Fuess, Hartmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Characterization of different Pt–Ru catalysts by X-ray diffraction and transmission electron microscopy |
| Sprache: | Englisch |
| Publikationsjahr: | März 2001 |
| Verlag: | Royal Society of Chemistry Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Chemistry Chemical Physics |
| Jahrgang/Volume einer Zeitschrift: | 3 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1039/B004887I |
| Kurzbeschreibung (Abstract): | Carbon-supported Pt-Ru (1 : 1)-catalysts have been synthesized by two reduction methods in an aqueous phase and in a third way in an organic solution and characterized in comparison to a commercial Pt-Ru/C catalyst purchased from E-TEK. X-ray di�raction and transmission electron microscopy were carried out on the di�erent samples in the as-synthesized state and after heat-treatment at 500 °C in nitrogen and air atmospheres respectively. Powder patterns of the di�erent catalysts in the as-synthesized state reveal a fcc pattern with d values matching or close to platinum. No evidence of metallic Ru or any oxide phases was found. After heat-treatment in nitrogen Ru reÑections occur in the synthesized catalyst samples, backing the supposition of separate platinum and ruthenium particles instead of a Pt-Ru alloy. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 19 Feb 2013 11:48 |
| Letzte Änderung: | 05 Mär 2013 10:05 |
| PPN: | |
| Sponsoren: | Financial support of the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie is gratefully acknowledged. |
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