Carbon was deposited on a mild steel cathode during electrolysis in the molten mixture of Li 2 CO 3 -K 2 CO 3 (mole ratio: 62:38) under the CO 2 atmosphere at 3.0 -5.0 V and 540 -700 o C. In a threeelectrode cell, cyclic voltammetry was applied on a platinum working electrode to study the reduction and deposition processes. A two-electrode cell helped correlate electrolysis variables, e.g. $ kg-C 1 for functional uses of the electro-deposited carbon.2

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