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

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

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2003
Autor(en): Franco, E. G. ; Arico, E. ; Linardi, M. ; Roth, Christina ; Martz, Nathalie ; Fuess, Hartmut
Titel: Synthesis and characterization of electrocatalyst powders for applications in PEM fuel cells
Sprache: Englisch
Kurzbeschreibung (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.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Materials science forum
Band: 416/41
Verlag: Trans Tech Publications, Switzerland
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 08:16
ID-Nummer: 10.4028/www.scientific.net/MSF.416-418.4
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