Polarization Measurements at Carbon and Noble-Metal
Electrodes in the NaClKClNa₂CO₃ Melt

V. N. Nekrasov, N. M. Barbin, and A. P. Pekar’

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

Received June 21, 1995

Abstract—The electrode processes in dilute sodium carbonate solutions (0.1–5 mol %) in equimolar molten
mixture of sodium and potassium chlorides are studied. Polarization measurements are conducted at metal
(platinum, gold) and carbon (glassy carbon, spectral graphite) electrodes in controlled gas atmosphere (He, CO,
CO₂, or 2CO₂ + O₂) under steady-state conditions, at a temperature of 1053 K. The initial steady-state potentials
are fixed. The polarization curves are obtained in wide potential regions and employed to determine the Tafel
slopes and the polarization resistances (by processing the initial parts of the curves). The regularities inherent
in the electrochemical behavior of the system under study in the course of varying the gas phase, electrode
materials, and carbonate concentration are noted.

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.