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Synthesis and characterization of electrocatalyst powders for applications in PEM fuel cells

Franco, E. G. and Arico, E. and Linardi, M. and Roth, Christina and Martz, Nathalie and Fuess, Hartmut (2003):
Synthesis and characterization of electrocatalyst powders for applications in PEM fuel cells.
In: Materials science forum, Trans Tech Publications, Switzerland, pp. 4-10, 416/41, [Article]

Abstract

The Bönnemann method was chosen to synthesize carbon-supported Pt-Ru-Mo electrocatalyst powders, as this mthod leads to highly-dispersed nanoparticles with an average particle size of approximately 2 nm. Structural characterization of the resulting catalysts was done by the following techniques: X-rays fluorescence analysis (XFA) and nanosize-energy dispersive X-rays analysis (nano-EDX)to obtain information about noble metal loading and composition as well as X-rays diffraction (XRD) and high resolution transmission electropn microscopy (HRTEM) to determine structure, dispersion and crystallite size of the nanoparticles. X-rays photoelectron spectroscopy (XPS) was applied to detect amorphous phases and to determine the oxidation states of Pt, Ru and Mo. The morphology of membrane electrode assemblies, prepared by a spraying technique, was checked by scanning electron microscopy (SEM). For the determination of the electrocatalytic activity E/i curves in single cell arrangements were recorded using both H2/CO mixtures and methanol as feed gases.

Item Type: Article
Erschienen: 2003
Creators: Franco, E. G. and Arico, E. and Linardi, M. and Roth, Christina and Martz, Nathalie and Fuess, Hartmut
Title: Synthesis and characterization of electrocatalyst powders for applications in PEM fuel cells
Language: English
Abstract:

The Bönnemann method was chosen to synthesize carbon-supported Pt-Ru-Mo electrocatalyst powders, as this mthod leads to highly-dispersed nanoparticles with an average particle size of approximately 2 nm. Structural characterization of the resulting catalysts was done by the following techniques: X-rays fluorescence analysis (XFA) and nanosize-energy dispersive X-rays analysis (nano-EDX)to obtain information about noble metal loading and composition as well as X-rays diffraction (XRD) and high resolution transmission electropn microscopy (HRTEM) to determine structure, dispersion and crystallite size of the nanoparticles. X-rays photoelectron spectroscopy (XPS) was applied to detect amorphous phases and to determine the oxidation states of Pt, Ru and Mo. The morphology of membrane electrode assemblies, prepared by a spraying technique, was checked by scanning electron microscopy (SEM). For the determination of the electrocatalytic activity E/i curves in single cell arrangements were recorded using both H2/CO mixtures and methanol as feed gases.

Journal or Publication Title: Materials science forum
Volume: 416/41
Publisher: Trans Tech Publications, Switzerland
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 08:16
Identification Number: doi:10.4028/www.scientific.net/MSF.416-418.4
License: [undefiniert]
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