Electrochemical studies of gold and chloride in ionic liquids
Journal
New Journal of Chemistry
Journal Volume
30
Journal Issue
11
Start Page
1576
End Page
1583
ISSN
11440546
Date Issued
2006
Author(s)
Silvester, Debbie S.
Villagrán, Constanza
Pitner, William R.
Compton, Richard G.
Cristina Lagunas, M.
Hardacre, Christopher
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 4mim][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. © the Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2006.
Publisher
Royal Society of Chemistry
Type
journal article