Influence of the anion on the electrodeposition of cobalt from imidazolium ionic liquids

S. Schaltin, Peter Nockemann, B. Thijs, K. Binnemans, J. Fransaer

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43 Citations (Scopus)

Abstract

Cyclic voltammetry and absorption spectrophotometry were used to examine the complex formation of cobalt (II) in the ionic liquids 1-butyl-3-methylimidazolium chloride ([C(4)mim] Cl) and 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide ([C(4)mim][Tf2N]). In [C(4)mim]Cl, cobalt(II) is complexed as [CoCl4](2-) at CoCl2 concentrations less than 33 mol %. Cyclic voltammograms show that cobalt cannot be electrodeposited at these concentrations. However, cobalt metal can be electrodeposited at CoCl2 concentrations above the threshold concentration of 33 mol %. In the ionic liquid [C(4)mim][Tf2N] there is no threshold CoCl2 concentration for electrodeposition due to the absence of [CoCl4](2-). (C) 2007 The Electrochemical Society.
Original languageEnglish
Pages (from-to)D104-D107
Number of pages4
JournalELECTROCHEMICAL AND SOLID STATE LETTERS
Volume10
Issue number10
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)

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