The effect of temperature and oxygen partial pressure on the reduction mechanism in the Pr2CuO4/Ce0.9Gd 0.1O1.95 system

N. V. Lyskov, G. N. Mazo, L. S. Leonova, L. M. Kolchina, S. Ya Istomin, E. V. Antipov

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The electrochemical behavior of a porous electrode based on Pr 2CuO4 (PCO) screen printed on the surface of Ce 0.9Gd0.1O1.95 (CGO) solid electrolyte is studied by impedance spectroscopy. The rate-determining stages of the oxygen reduction reaction at the PCO/CGO interface are found for the oxygen partial pressure interval of 30-105 Pa and temperatures of 773-1173 K. Changeover of the rate-determining stage of electrode reaction is shown to occur depending on the temperature and the oxygen partial pressure. The PCO electrode polarization resistance is 1.7 Ω cm2 at 973 K in air and remains constant at thermocycling of the electrochemical cell in the temperature range of 773-1173 K. Based on the found data, PCO can be considered as the promising cathodic material for solid-oxide fuel cells operating at moderate temperatures (773-973 K).

Original languageEnglish
Pages (from-to)747-752
Number of pages6
JournalRussian Journal of Electrochemistry
Volume49
Issue number8
DOIs
Publication statusPublished - Aug 2013
Externally publishedYes

Keywords

  • cathodic material
  • electrode/electrolyte interface
  • impedance spectroscopy
  • praseodymium cuprate
  • SOFC

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