Temperature Dependence
of the Polarization Resistance
of the O₂,Au/La_0.88Sr_0.12Ga_0.82Mg_0.18O_2.85 Electrode System

S. N. Shkerin^z, Yu. V. Sokolova, Yu. S. Khlupin, and S. M. Beresnev

Institute of High-Temperature Electrochemistry, Ural Division, Russian Academy of Sciences,
ul. S. Kovalevskoi 20, Yekaterinburg, 620219 Russia

Received October 27, 2003; in final form, May 27, 2004

Abstract—The impedance of a porous gold electrode in contact with solid electrolyte
La_0.88Sr_0.12Ga_0.82Mg_0.18O_2.85 and the effect of the manufacture conditions on its polarization resistance are
studied at 600800 in air. The overall oxygen reaction rate on a gold electrode is described as the sum of two
partial constituents, namely, the oxygen exchange at the gas/electrolyte interface at the gold/gas/electrolyte tri-
ple-phased boundary.

Key words: O₂,Au/La_0.88Sr_0.12Ga_0.82Mg_0.18O_2.85

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