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, 9 (2), pp. 121-126. ECOLE POLYTECHNIQUE MONTREAL, C P 6079, SUCC CENTRE-VILLE, MONTREAL, PQ H3C 3A7, CANADA, 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 |
| Journal 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 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Erneuerbare Energien 11 Department of Materials and Earth Sciences > Material Science > Structure Research |
| 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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