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The effect of temperature and oxygen partial pressure on the reduction mechanism in the Pr2CuO4/Ce0.9Gd0.1O1.95 system

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Abstract

The electrochemical behavior of a porous electrode based on Pr2CuO4 (PCO) screen printed on the surface of Ce0.9Gd0.1O1.95 (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).

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast’, 142432, Russia

    N. V. Lyskov & L. S. Leonova

  2. Faculty of Chemistry, Moscow State University, Vorob’evy Gory, Moscow, 119992, Russia

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

Authors
  1. N. V. Lyskov
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  2. G. N. Mazo
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  3. L. S. Leonova
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  4. L. M. Kolchina
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  5. S. Ya. Istomin
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  6. E. V. Antipov
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Corresponding author

Correspondence to N. V. Lyskov.

Additional information

Original Russian Text © N.V. Lyskov, G.N. Mazo, L.S. Leonova, L.M. Kolchina, S.Ya. Istomin, E.V. Antipov, 2013, published in Elektrokhimiya, 2013, Vol. 49, No. 8, pp. 834–839.

This publication was prepared on the basis of a report delievered at the XI Meeting “Fundamental Problems of Solid State Ionics”, Chernogolovka, 2012.

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Lyskov, N.V., Mazo, G.N., Leonova, L.S. et al. The effect of temperature and oxygen partial pressure on the reduction mechanism in the Pr2CuO4/Ce0.9Gd0.1O1.95 system. Russ J Electrochem 49, 747–752 (2013). https://doi.org/10.1134/S1023193513080120

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  • DOI: https://doi.org/10.1134/S1023193513080120

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