Electrodeposition of carbon films from molten alkaline fluoride media |
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| Authors: | L MassotP Chamelot F BouyerP Taxil |
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| Affiliation: | a Département Procédés Electrochimiques et Matériaux, Laboratoire de Génie Chimique UMR 5503, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 4, France
b CEA/VALRHO, DEN/DTE/STME, BP 111, 26702 Pierrelatte Cedex, France |
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| Abstract: | The electrodeposition of carbon films from carbonate ions (CO32−) in molten alkaline fluorides (LiF/NaF) was investigated in the 700-800 °C temperature range using cyclic voltammetry and chronopotentiometry. The cathodic peak in the cyclic voltammogram indicates that CO32− ions are reduced in a one-step process: CO32−+4e−→C+3O2−. Deposits of amorphous carbon were obtained by potentiostatic electrolysis and analysed by several physical techniques: X-ray diffraction, Raman spectroscopy, scanning electron microscopy coupled with energy dispersive spectroscopy. |
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| Keywords: | Carbonate ions Carbon electrodeposition Molten fluorides Cyclic voltammetry Chronopotentiometry |
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