Benker, Nathalie ; Roth, Christina ; Mazurek, Marian ; Fuess, Hartmut
:
Synthesis and characterisation of ternary Pt/Ru/Mo catalysts for the anode of the PEM fuel cell.
In:
Journal of new materials for electrochemical systems, 9
(2)
pp. 121-126.
ISSN 1480-2422
[Artikel], (2006)
Kurzbeschreibung (Abstract)
Miscellaneous compositions of carbon-supported Pt/Ru/Mo catalysts were synthesised via reductive precipitation using hydrazine. The precipitation of the different Pt/Ru/Mo catalysts was carried out with H2PtCl6, RuCl3 and Mo(CO)6 as precursors for synthesis I and (NH4)6Mo7O24 for synthesis II. The home-made catalysts were structurally characterised with different methods before and after electrochemical investigation in a membrane fuel cell. Furthermore cyclic voltammetry was perfomed to determine the catalytic activity of the different Pt/Ru/Mo catalysts. X-ray fluorescence analysis (XFA), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDXS) demonstrate that the precursor used in synthesis I is not adequate for the preparation of ternary Pt/Ru/Mo catalysts. Transmission electron microscopy (TEM) images of the differently prepared catalysts show the formation of 20 nm agglomerates composed of 2-3 nm crystallites, which separate into individual nanoparticles during fuel cell operation. The particle size was determined with TEM and X-ray diffraction (XRD), and is independent of the Pt/Ru/Mo ratio. No significant particle growth is observed after operation.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2006 |
| Autor(en): | Benker, Nathalie ; Roth, Christina ; Mazurek, Marian ; Fuess, Hartmut |
| Titel: | Synthesis and characterisation of ternary Pt/Ru/Mo catalysts for the anode of the PEM fuel cell |
| Sprache: | Englisch |
| Kurzbeschreibung (Abstract): | Miscellaneous compositions of carbon-supported Pt/Ru/Mo catalysts were synthesised via reductive precipitation using hydrazine. The precipitation of the different Pt/Ru/Mo catalysts was carried out with H2PtCl6, RuCl3 and Mo(CO)6 as precursors for synthesis I and (NH4)6Mo7O24 for synthesis II. The home-made catalysts were structurally characterised with different methods before and after electrochemical investigation in a membrane fuel cell. Furthermore cyclic voltammetry was perfomed to determine the catalytic activity of the different Pt/Ru/Mo catalysts. X-ray fluorescence analysis (XFA), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDXS) demonstrate that the precursor used in synthesis I is not adequate for the preparation of ternary Pt/Ru/Mo catalysts. Transmission electron microscopy (TEM) images of the differently prepared catalysts show the formation of 20 nm agglomerates composed of 2-3 nm crystallites, which separate into individual nanoparticles during fuel cell operation. The particle size was determined with TEM and X-ray diffraction (XRD), and is independent of the Pt/Ru/Mo ratio. No significant particle growth is observed after operation. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of new materials for electrochemical systems |
| Band: | 9 |
| (Heft-)Nummer: | 2 |
| Verlag: | ECOLE POLYTECHNIQUE MONTREAL, C P 6079, SUCC CENTRE-VILLE, MONTREAL, PQ H3C 3A7, CANADA |
| Freie Schlagworte: | Platinum, Ruthenium, Molybdenum, PEMFC, FC Anode, TEM, XRD, Electrocatalysis |
| 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 |
| Sponsoren: | Financial support of the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie is gratefully acknowledged. |
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