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

Roth, Christina and Martz, Nathalie and Fuess, Hartmut (2001):
Characterization of different Pt–Ru catalysts by X-ray diffraction and transmission electron microscopy.
In: Physical Chemistry Chemical Physics, Royal Society of Chemistry Publishing, pp. 315-319, 3, (3), ISSN 14639076,
[Online-Edition: http://dx.doi.org/10.1039/B004887I],
[Article]

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.

Item Type: Article
Erschienen: 2001
Creators: Roth, Christina and Martz, Nathalie and Fuess, Hartmut
Title: Characterization of different Pt–Ru catalysts by X-ray diffraction and transmission electron microscopy
Language: English
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.

Journal or Publication Title: Physical Chemistry Chemical Physics
Volume: 3
Number: 3
Publisher: Royal Society of Chemistry Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Erneuerbare Energien
11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Feb 2013 11:48
Official URL: http://dx.doi.org/10.1039/B004887I
Identification Number: doi:10.1039/B004887I
Funders: Financial support of the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie is gratefully acknowledged.
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