Raman investigation of the O2, Pt/YSZ electrode under polarization

In order to clarify the nature of the oxygen species at the Pt surface in electrochemical cells based on yttria-stabilized zirconia (YSZ), we have attempted to obtain in situ Raman spectra of Pt electrode in the temperature range from 300 to 500 deg C under controlled atmosphere. The nanocrystalline...

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Bibliographic Details
Published inSolid state ionics Vol. 176; no. 35-36; pp. 2599 - 2607
Main Authors Sum, Oliver Sze Nga, Djurado, Elisabeth, Pagnier, Thierry, Rosman, Noel, Roux, Claude, Siebert, Elisabeth
Format Journal Article
LanguageEnglish
Published Elsevier 15.11.2005
Subjects
Chemical Sciences
Material chemistry
Spray pyrolysis
Nanocrystalline platinum
Yttria-stabilized zirconia
Electrochemistry
Catalysis
Raman spectroscopy
Oxygen adsorption
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Summary:In order to clarify the nature of the oxygen species at the Pt surface in electrochemical cells based on yttria-stabilized zirconia (YSZ), we have attempted to obtain in situ Raman spectra of Pt electrode in the temperature range from 300 to 500 deg C under controlled atmosphere. The nanocrystalline Pt film, 0.5 mum in thickness, was prepared by a spray pyrolysis technique. We have demonstrated the possibility of monitoring adsorbed oxygen coming from the gas phase or from polarization through YSZ. Surface Pt-O interaction resulting either from oxygen of the gas phase or oxygen supplied electrochemically showed similar spectral signature corresponding to a broad band located near 545 cm-1 at 350 deg C. This broad band was tentatively assigned to the Pt-O stretch mode of atomic oxygen on Pt.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2005.06.006