Electrochemical oxygen reduction on LaNi 0.6Fe 0.4O 3-δ film electrode

R. A. Budiman, S. Hashimoto, K. Amezawa, T. Kawada

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

Abstract

Electrochemical oxygen reduction on an LaNi 0.6Fe 0.4O 3-δ (LNF) dense film electrode was investigated by using AC impedance spectroscopy as functions of temperature (923∼1073 K), oxygen partial pressure (10 -3∼1 bar), and DC bias (-50∼+20 mV). It was found the oxygen reduction reaction on the LNF electrode is rate-controlled by the absorption and the dissociation of oxygen molecules at the surface, although other elementary reactions also might contribute to the total reaction rate. 18O isotope exchange and its depth profile measurements by using a secondary ion mass spectrometry (SIMS) were performed to give quantitative analysis for the rate determining step (RDS) on LNF. The conclusion derived from the SIMS measurements was in good agreement with that from the electrochemical measurements, showing that the surface reaction is a major cause of the resistance in the LNF electrode but the bulk diffusion also may contribute to the reaction rate.

Original languageEnglish
Title of host publicationIonic and Mixed Conducting Ceramics 8
Pages287-293
Number of pages7
Edition1
DOIs
Publication statusPublished - 2012 Nov 19
EventIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting - Seattle, WA, United States
Duration: 2012 May 62012 May 10

Publication series

NameECS Transactions
Number1
Volume45
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting
Country/TerritoryUnited States
CitySeattle, WA
Period12/5/612/5/10

ASJC Scopus subject areas

  • Engineering(all)

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