Electrodeposition of gold in an amide-type ionic liquid

Yasushi Katayama, Tomoyuki Endo, Takashi Miura, Kazunobu Toshima

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Electrode reactions of monovalent and trivalent bromoaurates, [Au^B^]- and [AumBr4]-, have been investigated in an amide-type ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide. [AumBr4]- could be reduced to metallic Au via an intermediate species, [AuIBr2]-, which was stable in the ionic liquid. [AuIBr2]- could be prepared by a proportionation reaction of [AumBr4]- and Au in the ionic liquid. Although metallic Au was deposited on a glassy carbon substrate at -1.5 V vs. Ag/Ag(I), Au nano-particles with an average diameter of (2.6 ± 0.6) nm were formed and dispersed in the ionic liquid by potentiostatic cathodic reduction on a glassy carbon electrode at -2.5 V vs. Ag/Ag(I).

Original languageEnglish
Pages (from-to)D87-D91
JournalJournal of the Electrochemical Society
Issue number3
Publication statusPublished - 2014 Feb 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


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