Mazurek, Marian ; Benker, Nathalie ; Roth, Christina ; Buhrmester, Thorsten ; Fuess, Hartmut (2006)
Electrochemical impedance and x-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode.
In: Fuel cells, 6 (1)
Artikel, Bibliographie
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 |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrochemical impedance and x-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2006 |
| Verlag: | WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Fuel cells |
| Jahrgang/Volume einer Zeitschrift: | 6 |
| (Heft-)Nummer: | 1 |
| 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. |
| Freie Schlagworte: | EIS, EXAFS, Mixture, PEMFC |
| Zusätzliche Informationen: | Special Issue: 2nd France – Deutschland Fuel Cells Conference |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung |
| Hinterlegungsdatum: | 20 Nov 2008 08:25 |
| Letzte Änderung: | 20 Feb 2020 13:23 |
| PPN: | |
| Sponsoren: | Financial support of the Deutsche Forschungsgemeinschaft is gratefully acknowledged., M. Mazurek is supported by a Graduiertenstipendium des Landes Hessen. |
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