par Soma, Fousseni 
;Nguyen, Van Trang ;Bougouma, Moussa;Djorf, Oussama ;Buess Herman, Claudine ;Doneux, Thomas
Référence Electrochimica acta, 498, 144660
Publication Publié, 2024-07-02
;Nguyen, Van Trang ;Bougouma, Moussa;Djorf, Oussama ;Buess Herman, Claudine ;Doneux, Thomas Référence Electrochimica acta, 498, 144660
Publication Publié, 2024-07-02
Article révisé par les pairs
| Résumé : | The electrochemistry of the Au(III)-Au(I)-Au(0) system was studied in the choline chloride - oxalic acid dihydrate deep eutectic solvent at 60°C. At glassy carbon electrodes, the 2 e− waves of the Au(III)/Au(I) and the 1 e− waves of the Au(I)/Au(0) are well separated in the cyclic voltammograms, whereas at platinum electrodes two anodic peaks but only one single 3 e− cathodic peak are observed. Electrochemical quartz crystal microbalance and zero-current chronopotentiometric experiments demonstrate the occurrence of a comproportionation reaction AuCl_4^-+ 2Au(0)+〖2Cl〗^- "⇌ " 〖3AuCl〗_2^- when gold is electrodeposited from an Au(III) solutions. The standard potentials of the Au(III)/Au(I), Au(I)/Au(0) and Au(III)/Au(0) couples were estimated, and even though E_(Au(III)/Au(I))^0 |
