Electrochemical studies of gold and chloride in ionic liquids

Leigh Aldous, D.S. Silvester, Constanza Villagran, W.R. Pitner, R.G. Compton, M.C. Lagunas, Christopher Hardacre

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)

Abstract

For the first time, the electrochemistry of gold has been studied in detail in a 'second-generation', non-haloaluminate, ionic liquid. In particular, the electrochemical behaviour of Na[AuCl4] has been investigated in 1-butyl-3-methylimidazolium bis{(tifluoromethyl)sulfonyl} imide, [C(4)mim][NTf2], over gold, platinum and glassy carbon working electrodes. The reduction of [AuCl4](-) initially forms [AuCl2](-) before deposition on the electrode as Au(0). To enable stripping of deposited gold or electrodissolution of bulk gold, the presence of chloride, trichloride or chlorine is required. Specifically trichloride and chlorine have been identified as the active species which preferentially form Au(I) and Au(III), respectively.
Original languageEnglish
Pages (from-to)1576-1583
Number of pages8
JournalNew journal of chemistry
Volume30
Issue number11
DOIs
Publication statusPublished - Aug 2006

ASJC Scopus subject areas

  • Chemistry(all)

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