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Article Dans Une Revue RSC Advances Année : 2014

Unusual electrochemical behaviour of AuBr4− in ionic liquids. Towards a simple recovery of gold( iii ) after extraction into an ionic liquid

Résumé

The electrochemistry of AuBr4− complexes extracted into ionic liquids [C8PYR][NTf2] or [C8MIM][NTf2] saturated with water and gas has been studied by cyclic voltammetry on a glassy carbon macro electrode and by linear voltammetry on a platinum microelectrode. Unlike AuCl4−, the reduction of AuBr4− to Au(0) is achieved following a one reduction step involving three electrons. The deposition of Au(0) from AuBr4− is carried out at a potential above that of water, leading to the simple and easy deposition of gold and subsequently to the extraction of AuBr4− into an ionic liquid.
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hal-01902926 , version 1 (24-10-2018)

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Nicolas Papaiconomou, Nicolas Glandut, Isabelle Billard, Eric Chaînet. Unusual electrochemical behaviour of AuBr4− in ionic liquids. Towards a simple recovery of gold( iii ) after extraction into an ionic liquid. RSC Advances, 2014, 4 (103), pp.58910 - 58915. ⟨10.1039/C4RA10815A⟩. ⟨hal-01902926⟩
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