Anomalous Voltammetric Behavior Observed for Electrodeposition of Indium in the 1-Butyl-1-methylpyrrolidinium Dicyanamide Ionic Liquid. A Result of the Ionic Liquid Cation Adsorption

Yi Chen Liu, Yu Chen Chen, Yi Ting Hsieh, I-Wen Sun

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11 Citations (Scopus)

Abstract

Ionic liquids (ILs) are widely used for electrochemical studies. However, electrochemical reactions taking place in ILs could be complicated by the interfacial IL ion layers at the electrode/IL interface. In this work, such complications are revealed via the electrochemical study of indium(III)/indium redox couple in the 1-butyl-1- methylpyrrolidinium dicyanamide ([BMP]+[DCA]-) IL. Anomalous voltammetric behavior is observed with static cyclic voltammetry, convective rotating disk electrode voltammetry, and potential step chronoamperometry. The results indicate that the In(III) reduction process is complicated by the adsorption/desorption of the [BMP]+ cations. Meanwhile, less anomalous voltammetric behavior is observed in the 1-ethyl-3-methylimidazolium dicyanamide ([EMim]+[DCA]-) IL, in agreement with the weaker adsorption strength of the [EMim]+ cation. The impact of the cation adsorption is weakened by raising the temperature.

Original languageEnglish
Pages (from-to)8907-8913
Number of pages7
JournalJournal of Physical Chemistry C
Volume121
Issue number16
DOIs
Publication statusPublished - 2017 Apr 27

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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