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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