par Soro, Lassina;Soma, Fousseni 
;Bougouma, Moussa;Buess Herman, Claudine ;Parpal Gimenez, Monica ;Ustarroz Troyano, Jon ;Doneux, Thomas
Référence Journal of solid state electrochemistry, 28, page (1509-1519)
Publication Publié, 2024-01-24
;Bougouma, Moussa;Buess Herman, Claudine ;Parpal Gimenez, Monica ;Ustarroz Troyano, Jon ;Doneux, Thomas Référence Journal of solid state electrochemistry, 28, page (1509-1519)
Publication Publié, 2024-01-24
Article révisé par les pairs
| Résumé : | The electrochemistry of Sn(II), Sn(IV) and Se(IV) in the choline chloride-glycerol deep eutectic solvent was investigated on glassy carbon at 110°C by various electrochemical methods including cyclic voltammetry, chronopotentiometry and chronoamperometry. The Sn(IV)/Sn(II) couple displays very slow electrochemical kinetics, so that the reduction of Sn(IV) essentially proceeds directly to Sn(0) through a 4 e− process, even if the potential of the Sn(IV)/Sn(II) couple is more positive than the Sn(II)/Sn(0) couple. Because of this sequence of potentials, the comproportionation reaction Sn(IV) + Sn(0) → 2Sn(II) takes place when elemental tin is deposited from the Sn(IV) solution. The electrodeposition of tin proceeds through an instantaneous nucleation process with Sn(II) whereas a progressive nucleation mechanism is observed with Sn(IV). In the presence of both Sn(IV) and Se(IV) in solution, voltammetric features associated with the formation of a Sn-Se compound are clearly identified and the suitable potential range where the compound can be deposited without co-deposition of elemental tin is determined, as confirmed by SEM images and EDX analyses |
