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REVISTA DE CHIMIE
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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2014, Volume 65, Issue 1,





FLORENTINA GOLGOVICI, MARIANA LILI MARES, ANCA COJOCARU
Electro-deposition of Cobalt and Cobalt-Antimony
from Non-Aqueous Media Containing Ethylene Glycol

Abstract:

Cobalt deposition and cobalt and antimony co-deposition were evidenced in two non-aqueous electrolytes, both with advantage of a larger electrochemical window: one with ethylene glycol as solvent and the other one a choline chloride based ionic liquid with ethylene glycol as the second component of eutectic mixture. Deposition of singular antimony was also studied in both media. Cyclic voltammetry and electrochemical impedance spectroscopy were used under various conditions (scan rate, ion concentration). A single pair of reduction/oxidation processes was evidenced in CV curves for individual deposition. In ionic liquids with both Co and Sb ions, a first process of Sb deposition occurs before Co + Sb co-deposition. Analyzing Nyquist and Bode spectra the differences between impedance behaviour at various cathodic polarization were observed. Keywords: cobalt, cobalt-antimony compound, electro-deposition, ethylene glycol, choline chloride based ionic liquid

Issue: 2014, Volume 65, Issue 1
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