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

doi:10.1149/1.2729206

Studies of oxygen exchange on thin-film La_0.6Sr _0.4CoO_3-δ using nonlinear electrochemical impedance spectroscopy (NLEIS)

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

ENV - Environmental Studies for Advanced Society

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 La_0.6Sr _0.4CoO_3-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 language	English
Title of host publication	ECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Pages	1089-1096
Number of pages	8
Edition	1 PART 1
DOIs	https://doi.org/10.1149/1.2729206
Publication status	Published - 2007
Event	10th International Symposium on Solid Oxide Fuel Cells, SOFC-X - , Japan Duration: 2007 Jun 3 → 2007 Jun 8

Publication series

Name	ECS Transactions
Number	1 PART 1
Volume	7
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Country/Territory	Japan
Period	07/6/3 → 07/6/8

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/1.2729206

Cite this

Wilson, J. R., Sase, M., Kawada, T., & Adler, S. B. (2007). Studies of oxygen exchange on thin-film La_0.6Sr _0.4CoO_3-δ using nonlinear electrochemical impedance spectroscopy (NLEIS). In ECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X (1 PART 1 ed., pp. 1089-1096). (ECS Transactions; Vol. 7, No. 1 PART 1). https://doi.org/10.1149/1.2729206

Studies of oxygen exchange on thin-film La_0.6Sr _0.4CoO_3-δ using nonlinear electrochemical impedance spectroscopy (NLEIS). / Wilson, Jamie R.; Sase, Maya; Kawada, Tatsuya; Adler, Stuart B.

ECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X. 1 PART 1. ed. 2007. p. 1089-1096 (ECS Transactions; Vol. 7, No. 1 PART 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Wilson, JR, Sase, M, Kawada, T & Adler, SB 2007, Studies of oxygen exchange on thin-film La_0.6Sr _0.4CoO_3-δ using nonlinear electrochemical impedance spectroscopy (NLEIS). in ECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X. 1 PART 1 edn, ECS Transactions, no. 1 PART 1, vol. 7, pp. 1089-1096, 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X, Japan, 07/6/3. https://doi.org/10.1149/1.2729206

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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.",

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