A Study of the Calcium‐Thionyl Chloride Electrochemical System

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Abstract
The steady‐state galvanostatic polarization curve was obtained on the front side of a Pt diaphragm in contact with solution while the back side was in contact with concentrated . From low oxygen overvoltage measurements it is shown that the rest potential is the reversible potential. The rate of reduction on the Pt‐O alloy diaphragm is lower at high current densities than on a bright Pt cathode. At very high current densities the system is driven into the region where the is close to the literature values for the on bright Pt. When the system was returned to open‐circuit, the rest potential returned to the normal oxygen potential after about 24 hr. This time delay represents the time required to repair the complete layer of adsorbed oxygen atoms which had been removed by the strong cathodic current.

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