Studies of oxygen exchange on thin-film La0.6Sr 0.4CoO3-δ using nonlinear electrochemical impedance spectroscopy (NLEIS)

Jamie R. Wilson, Maya Sase, Tatsuya Kawada, Stuart B. Adler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to probe the mechanism of O2 reduction on mixed-conducting oxides, we have measured the nonlinear harmonic impedance response of a dense thin film electrode of La0.6Sr 0.4CoO3-δ (LSC-64). This approach reveals the nonlinear rate law governing O2 reduction/oxidation. Comparison to various models based on nonequilibrium thermodynamics suggests that O 2 reduction on LSC-64 is limited by dissociative adsorption. These results are discussed in the context of known equilibrium exchange kinetics and electronic structure. Implications for porous electrode kinetics are also discussed.

Original languageEnglish
Title of host publicationECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Pages1089-1096
Number of pages8
Edition1 PART 1
DOIs
Publication statusPublished - 2007 Dec 1
Event10th International Symposium on Solid Oxide Fuel Cells, SOFC-X - , Japan
Duration: 2007 Jun 32007 Jun 8

Publication series

NameECS Transactions
Number1 PART 1
Volume7
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
CountryJapan
Period07/6/307/6/8

ASJC Scopus subject areas

  • Engineering(all)

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