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Title
La0.6Sr0.4CoO3- (LSC) thin film electrodes with very fast oxygen reduction kinetics prepared by a solgel route
AuthorJanuschewsky, Judith ; Stoeger-Pollach, Michael ; Kubel, Frank ; Friedbacher, Gernot ; Fleig, Juergen
Published in
Zeitschrift für Physikalische Chemie, 2012, Vol. 226, Issue 9-10, page 889-899
PublishedDe Gryter, 2012
LanguageEnglish
Document typeJournal Article
Keywords (EN)Solid State Electrochemistry / Oxygen Reduction / Lanthanum Cobaltite / Impedance / Microelectrode
ISSN2196-7156
URNurn:nbn:at:at-ubtuw:3-3893 Persistent Identifier (URN)
DOI10.1524/zpch.2012.0278 
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La0.6Sr0.4CoO3- (LSC) thin film electrodes with very fast oxygen reduction kinetics prepared by a solgel route [0.3 mb]
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Abstract (English)

La0.6Sr0.4CoO3- (LSC) thin film electrodes of about 80 nm thickness were prepared via a sol-gel route on yttria-stabilized zirconia (YSZ) and gadolinium doped ceria (GDC) solid electrolytes. Impedance measurements on microelectrodes fabricated from these films revealed very low polarization resistances for electrochemical oxygen exchange at intermediate temperatures (500600 C). Prerequisite for the very fast oxygen reduction kinetics was a limitation of the preparation (annealing) temperature to 600 C. Already after ca. 15 minutes annealing of the sol-gel prepared layer at this temperature, electrodes were electrochemically highly active despite low crystallinity (almost XRD amorphous). LSC electrodes on GDC showed much higher polarization resistances. However, this originated from an additional interfacial resistance rather than from kinetically slow LSC surfaces.

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CC-BY-NC-ND-License (4.0)Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License