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Characterization of different Pt–Ru catalysts by X-ray diffraction and transmission electron microscopy

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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