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Synthesis and characterisation of ternary Pt/Ru/Mo catalysts for the anode of the PEM fuel cell

Benker, Nathalie and Roth, Christina and Mazurek, Marian and Fuess, Hartmut (2006):
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, ECOLE POLYTECHNIQUE MONTREAL, C P 6079, SUCC CENTRE-VILLE, MONTREAL, PQ H3C 3A7, CANADA, pp. 121-126, 9, (2), ISSN 1480-2422, [Article]

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.

Item Type: Article
Erschienen: 2006
Creators: Benker, Nathalie and Roth, Christina and Mazurek, Marian and Fuess, Hartmut
Title: Synthesis and characterisation of ternary Pt/Ru/Mo catalysts for the anode of the PEM fuel cell
Language: English
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.

Journal or Publication Title: Journal of new materials for electrochemical systems
Volume: 9
Number: 2
Publisher: ECOLE POLYTECHNIQUE MONTREAL, C P 6079, SUCC CENTRE-VILLE, MONTREAL, PQ H3C 3A7, CANADA
Uncontrolled Keywords: Platinum, Ruthenium, Molybdenum, PEMFC, FC Anode, TEM, XRD, Electrocatalysis
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: 20 Nov 2008 08:25
License: [undefiniert]
Funders: Financial support of the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie is gratefully acknowledged.
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