O. Lebedeva, I. Kuznetsova, D. Kultin
Jan 27, 2022
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Journal
Journal of The Electrochemical Society
Abstract
The electro-oxidation of iodide has been investigated using cyclic voltammetry on a platinum electrode in ionic liquids tributylmethylammonium bis(trifluoromethylsulfonyl)imide (N4441NTf2) , trioctylmethylammonium salicylate (TOMAS) and 1-butyl-3-methylimidazolium tetrafluoroborate. The hydrophobic/hydrophilic THOMAS ionic liquid was used for the first time in electrochemical research. Two electro-oxidation processes are observed in all of the investigated ionic liquids. The calculation of the number of electrons corresponding to every electro-oxidation stage suggested that in N4441NTF2 electro-oxidation follows a different path than those described in the literature. The hydrophobicity/hydrophilicity of ionic liquids affects electrochemical processes. It was shown that the best electrolyte for electro-oxidation of iodide is hydrophobic ionic liquid N4441NTf2.