Effects of coumarin and saccharin on electrodeposition of Ni from a hydrophobic ionic liquid

Y. L. Zhu, Y. Katayama, T. Miura

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10 Citations (Scopus)

Abstract

The effects of additives, coumarin and saccharin, on electrodeposition of nickel were investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)2. Although the UV-vis spectra showed that the coordination environment of Ni(II) was not affected by addition of coumarin or saccharin, the overpotentials for the Ni(II)/Ni reduction increased and the current density decreased. The diffusion coefficients of the Ni(II) species in the presence of both additives were estimated to be close to that in the base electrolyte from the chronoamperometric results. The nucleation/growth model of Ni was changed from the instantaneous type to the progressive one after addition of coumarin or saccharin. The effects of these two additives on the morphology of the Ni deposits in Ni(TFSA)2/BMPTFSA were also characterized.

Original languageEnglish
Pages (from-to)303-308
Number of pages6
JournalElectrochimica Acta
Volume123
DOIs
Publication statusPublished - 2014 Mar 20

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Keywords

  • Coumarin
  • Electrodeposition
  • Ionic liquid
  • Nickel
  • Saccharin

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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