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Synthesis and characterization of carbon-supported Pt–Ru–WOx catalysts by spectroscopic and diffraction methods

Roth, C. ; Goetz, M. ; Fuess, H. (2001)
Synthesis and characterization of carbon-supported Pt–Ru–WOx catalysts by spectroscopic and diffraction methods.
In: Journal of Applied Electrochemistry, 31 (7)
doi: 10.1023/A:1017585901064
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Carbon-supported Pt–Ru–WO x /C catalysts for application in PEMFC anodes were synthesized by a modified Bönnemann method. Their electrocatalytic activity for the oxidation of H2/CO mixtures and CH3OH was measured by E/i-curves in PEM single cell arrangements under working conditions. Information about composition, microstructure and nanomorphology was obtained by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence analysis (XFA) and transmission electron microscopy (TEM). X-ray diffraction data at room temperature show only one single Pt f.c.c. phase; no evidence of Ru, W and their oxides, respectively, is found. Hence, the presence of W and Ru as amorphous oxide species seems likely. Surface-sensitive XPS measurements detect Pt0, platinum oxide and hydroxide species, metallic Ru, ruthenium oxide, hydrous ruthenium oxide and WO3. For the crystalline platinum phase particle sizes of less than 2 nm were determined by TEM images and XRD patterns via solving the Scherrer equation. Temperature-dependent XRD measurements were performed to show the influence of ageing on the catalyst structure.

Typ des Eintrags: Artikel
Erschienen: 2001
Autor(en): Roth, C. ; Goetz, M. ; Fuess, H.
Art des Eintrags: Bibliographie
Titel: Synthesis and characterization of carbon-supported Pt–Ru–WOx catalysts by spectroscopic and diffraction methods
Sprache: Englisch
Publikationsjahr: 1 Juli 2001
Verlag: Springer-Verlag
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Applied Electrochemistry
Jahrgang/Volume einer Zeitschrift: 31
(Heft-)Nummer: 7
DOI: 10.1023/A:1017585901064
Kurzbeschreibung (Abstract):

Carbon-supported Pt–Ru–WO x /C catalysts for application in PEMFC anodes were synthesized by a modified Bönnemann method. Their electrocatalytic activity for the oxidation of H2/CO mixtures and CH3OH was measured by E/i-curves in PEM single cell arrangements under working conditions. Information about composition, microstructure and nanomorphology was obtained by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence analysis (XFA) and transmission electron microscopy (TEM). X-ray diffraction data at room temperature show only one single Pt f.c.c. phase; no evidence of Ru, W and their oxides, respectively, is found. Hence, the presence of W and Ru as amorphous oxide species seems likely. Surface-sensitive XPS measurements detect Pt0, platinum oxide and hydroxide species, metallic Ru, ruthenium oxide, hydrous ruthenium oxide and WO3. For the crystalline platinum phase particle sizes of less than 2 nm were determined by TEM images and XRD patterns via solving the Scherrer equation. Temperature-dependent XRD measurements were performed to show the influence of ageing on the catalyst structure.

Freie Schlagworte: electrocatalysis, fuel cells, nanoparticles, Pt, Pt–Ru, XPS
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien
07 Fachbereich Chemie
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 19 Feb 2013 11:56
Letzte Änderung: 05 Mär 2013 10:05
PPN:
Sponsoren: Support of this work by the Deutsche Forschungsgemeinschaft and Fonds der Chemischen Industrie is gratefully acknowledged.
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