Electrochemical Studies of the Cathode Process in Pure Molten Magnesium Chloride

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Abstract
The reported observations are part of an extensive study on the cathode reaction during magnesium electrolysis. The cathodic discharge process has been studied by the use of voltammetry and chronoamperometry on glassy carbon and iron substrates in pure molten at 725°C. Formation of an Mg metal phase requires a large overpotential. The potentiostatic current transients seem to depend on charge transfer, phase formation on the substrate, and diffusion of dissolved magnesium away from the electrode. The rate control varies with applied potential and time. Potentiostatic current transients on glassy carbon showed remarkable features regarding the stability of Mg nuclei.
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