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TitleEXAFS analysis of electrocatalytic WC materials
Publication TypeJournal Article
Year of Publication2009
AuthorsIngham, B., Brady C.D.A., Burstein G.T., Gaston N., and Ryan M.P.
JournalJournal of Physical Chemistry C
Pagination17407 - 17410
Date Published2009
ISSN19327447 (ISSN)
KeywordsAbsorption spectroscopy, Acidic electrolytes, Electrocatalysis, Electrocatalysts, Electrocatalytic, EXAFS, Extended X ray absorption fine structure spectroscopy, Fuel cells, Local structure, Low temperature fuel cells, Nanocrystallines, Noble metals, Oxide phase, Passivation, Precious metals, Tungsten, Tungsten carbide
AbstractTungsten carbide is an interesting non-noble metal anode electrocatalyst that can be passivated against corrosion in acidic electrolytes for use in low-temperature fuel cells. The structure of nanocrystalline WC passivated in 1.5 M H2SO4 at 65 °C was studied using synchrotron extended X-ray absorption fine structure spectroscopy and compared with the as-prepared material. Changes in the average local structure are noted that correspond to the development of an oxide phase in the material. This is most likely to be present as a WIV-oxide phase on the surfaces of the particles. © 2009 American Chemical Society.

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