Abstract
The effect of the composition of the molten salt electrolyte on the morphology of carbon produced via reduction of carbon dioxide has been studied. Three different molten salt compositions (CaCl2-CaO-Na2Co3, CaCl2-Na2Co3, and CaCl2-CaO) were applied at constant potential difference of 3.0 V and carbon dioxide flow of ~ 1 mL/s for 120 min, and the current was recorded at 10-s intervals. The powder products obtained from the solidified electrolyte and cathode surface were then characterized by scanning electron microscopy and energy-dispersive spectroscopy. Rod-like structures with diameter of 120 nm formed on the surface of the steel cathode after electrolysis using CaCl2-0.5% M CaO-2% M Na2CO3 or CaCl2-2% M Na2CO3.
Published Version
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