Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells

Jayaraman, Shrisudersan, Jaramillo, Thomas F., Baeck, Sung-Hyeon and McFarland, Eric W. (2005) Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells. Journal of Physical Chemistry B, 109 48: 22958-22966. doi:10.1021/jp053053h


Author Jayaraman, Shrisudersan
Jaramillo, Thomas F.
Baeck, Sung-Hyeon
McFarland, Eric W.
Title Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells
Formatted title
Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2005-12-01
Sub-type Article (original research)
DOI 10.1021/jp053053h
Open Access Status Not yet assessed
Volume 109
Issue 48
Start page 22958
End page 22966
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Several compositions of Pt-WO3 catalysts were synthesized and characterized for the electro-oxidation of methanol and CO. The surface morphologies of the catalysts were found to be dependent on the composition. X-ray energy dispersive spectroscopy and X-ray photoelectron spectroscopy results suggest a surface enrichment of WO3 in the codeposited Pt-WO3 catalysts. Cyclic voltammetry and chronoamperometry in methanol show an improvement in catalytic activity for the Pt-WO3 catalysts. A significant improvement in the poison tolerance toward CO and other organic intermediates was observed in the mixed metal-metal oxide catalyst. The catalytic performance of the different compositons was directly compared by normalization of the current to active sites. CO-stripping voltammetry suggests the involvement of WO3 in the catalytic process as opposed to a mere physical effect as suggested by previous work. A possible mechanism for this improvement is proposed based on the electrochemical data.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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