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Electrical transport and kinetics of electrode processes in the system of (H2 + H2O + Ar), Pt|La0.9Sr0.1ScO3–δ

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Abstract

The method of impedance spectroscopy is used to study the electrochemical behavior of (H2 + H2O + Ar), Pt|La0.9Sr0.1ScO3–δ system depending on the temperature (500–700°C) and gas phase composition in the range of hydrogen gas pressures of–1.3 < log(pH2) <–0.01 and water vapor gas pressures of–1.3 < log(pH2O) <–0.03. It is found that conductivity of electrolyte increases and polarization resistance decreases at an increase in water and hydrogen content in the gas phase. The possible causes of such behavior of conductivity are considered and the possible mechanism of the electrode reaction is suggested for the temperature of 700°C.

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Authors and Affiliations

  1. Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, ul. Akademicheskaya 20, Ekaterinburg, 620990, Russia

    E. P. Antonova & D. I. Bronin

  2. Institute of Chemical Engineering, Ural Federal University, ul. Mira 19, Ekaterinburg, 620002, Russia

    D. I. Bronin

Authors
  1. E. P. Antonova
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  2. D. I. Bronin
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Correspondence to E. P. Antonova.

Additional information

Original Russian Text © E.P. Antonova, D.I. Bronin, 2016, published in Elektrokhimiya, 2016, Vol. 52, No. 7, pp. 668–672.

Published on the basis of the materials of III All-Russia Conference “Fuel Cells and Power Plants on Their Basis,” Chernogolovka, 2015.

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Antonova, E.P., Bronin, D.I. Electrical transport and kinetics of electrode processes in the system of (H2 + H2O + Ar), Pt|La0.9Sr0.1ScO3–δ . Russ J Electrochem 52, 595–599 (2016). https://doi.org/10.1134/S102319351607003X

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  • DOI: https://doi.org/10.1134/S102319351607003X

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