Pr0.8Sr0.2Co1-xFexO3 nanocrystalline powders: Electrochemical characterization for solid oxide fuel cell cathodes

Edoardo Magnone*, Masaru Miyayama, Enrico Traversa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Single-phase nanocrystalline powders in the Pr0.8Sr 0.2Co1-xFexO3 series (x = 0.0, 0.2, 0.5, 0.8, and 1.0) were prepared using a single-step combustion synthesis at low temperatures, based on the autoignition reaction of a nitrate solution in the presence of citric acid. These powders were used to prepare symmetrical cells with Sm-doped ceria electrolyte, whose Pr0.8Sr0.2Co 1-xFexO3/Ce0.8Sm0.2O 2-x interfaces were studied using electrochemical impedance spectroscopy (EIS) measurements. In particular, the impedance of the Pr 0.8Sr0.2Co1-xFexO3 electrodes was analyzed as a function of the overpotential, temperature, and oxygen partial pressure. The EIS plots were decomposed into at least two semicircles, which could be attributed to different elementary processes at high- and low-frequencies. The low frequency contributions strongly depended not only on temperature, but also on gas atmosphere and overpotential. copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationNanostructured Metal Oxides
Subtitle of host publicationProcessing and Applications
Pages163-171
Number of pages9
Volume3
Edition9
DOIs
StatePublished - 2006
Externally publishedYes
EventNanostructured Metal Oxides: Processing and Applications - 210th Electrochemical Society Meeting - Cancun, Mexico
Duration: Oct 29 2006Nov 3 2006

Other

OtherNanostructured Metal Oxides: Processing and Applications - 210th Electrochemical Society Meeting
CountryMexico
CityCancun
Period10/29/0611/3/06

ASJC Scopus subject areas

  • Engineering(all)

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