Electrochemical carbon formation from a graphite anode has been investigated in an LiCl molten salt containing oxygen ions. Carbon can be formed via various chemical or electrochemical routes. The carbon dust produced during electrolysis probably contaminates the salt and it leads to a decrease of the current efficiency and the purity of the metal product. A possible reaction path for carbon formation during electrolysis has been proposed in this study.

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NdNi5 alloy with 1600 ppm oxygen content is prepared with 50% current efficiency by electrochemical reduction of a stoichiometric mixture of Nd2O3 and NiO in molten LiCl (3.2 V cell voltage, 750 °C, 1 h).

The diffusion coefficients of Mg 2+ ions at molybdenum electrode in molten LiCl-KCl-MgCl2 at 670 ºC were determined using the cyclic voltammetry, chronoamperometry and chronopotentiometry, which were calculated to be 1.47 × 10-6 , 1.23 × 10-6 and 1.67 × 10-6 cm 2 /s, respectively. The activation energy for the diffusion process of Mg 2+ ions was found to be 106.3 kJ/mol. The underpotential deposition (UPD) of Li + ions on the pre-deposited Mg and the codeposition of Mg 2+ and Li + ions led a formation of liquid Mg-Li solution at a more positive potential than a potential for Li deposition.

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