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Electrochemical impedance and x-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode

Mazurek, Marian ; Benker, Nathalie ; Roth, Christina ; Buhrmester, Thorsten ; Fuess, Hartmut :
Electrochemical impedance and x-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode.
In: Fuel cells, 6 (1) pp. 16-20.
[Artikel], (2006)

Kurzbeschreibung (Abstract)

The effect of alloy formation on the performance of carbonsupported Pt and Ru fuel cell catalysts has been investigated by electrochemical impedance spectroscopy (EIS), X-ray absorption spectroscopy (EXAFS) and fuel cell tests. The CO tolerance of the respective anode electrocatalysts has been tested in both reformate and methanol operation. This paper describes results for mixtures of carbon-supported Pt and carbon-supported Ru catalysts. The particle sizes of the active metals have been modified by heat-treatment in nitrogen. It has been observed that the size of Pt and Ru particles has a significant influence on the electrochemical performance, the activity improving for smaller Ru particles. The performance of certain Pt-Ru mixtures in a single cell fuel cell is comparable with an alloy catalyst.

Typ des Eintrags: Artikel
Erschienen: 2006
Autor(en): Mazurek, Marian ; Benker, Nathalie ; Roth, Christina ; Buhrmester, Thorsten ; Fuess, Hartmut
Titel: Electrochemical impedance and x-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode
Sprache: Englisch
Kurzbeschreibung (Abstract):

The effect of alloy formation on the performance of carbonsupported Pt and Ru fuel cell catalysts has been investigated by electrochemical impedance spectroscopy (EIS), X-ray absorption spectroscopy (EXAFS) and fuel cell tests. The CO tolerance of the respective anode electrocatalysts has been tested in both reformate and methanol operation. This paper describes results for mixtures of carbon-supported Pt and carbon-supported Ru catalysts. The particle sizes of the active metals have been modified by heat-treatment in nitrogen. It has been observed that the size of Pt and Ru particles has a significant influence on the electrochemical performance, the activity improving for smaller Ru particles. The performance of certain Pt-Ru mixtures in a single cell fuel cell is comparable with an alloy catalyst.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Fuel cells
Band: 6
(Heft-)Nummer: 1
Verlag: WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Freie Schlagworte: EIS, EXAFS, Mixture, PEMFC
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Erneuerbare Energien
Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Strukturforschung
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 20 Nov 2008 08:25
Zusätzliche Informationen:

Special Issue: 2nd France – Deutschland Fuel Cells Conference

Sponsoren: Financial support of the Deutsche Forschungsgemeinschaft is gratefully acknowledged., M. Mazurek is supported by a Graduiertenstipendium des Landes Hessen.
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