The electrochemistry of indium was studied with voltammetry and chronoamperometry at glassy carbon, tungsten, and nickel electrodes in the basic and acidic aluminum chloride‐l,2‐dimethyl‐3‐propylimidazolium chloride molten salt at 27°C. In the basic melt, In(III) is complexed as [ InCl 5 ] 2 − , which could be reduced to indium metal through a three‐electron reduction process. The electrodeposition of indium on glassy carbon and tungsten electrodes involves progressive three‐dimensional nucleation on a finite number of active sites with diffusion‐controlled growth of the nuclei. The electrodeposition of indium metal on a nickel electrode entails progressive three‐dimensional nucleation on a large number of active sites. The formal potentials of the In(III)/In couple in the 44.4 to 55.6 and 49.0 to 51.0 mole percent (m/o) melts are −1.096 and −1.009 V, respectively, vs. Al(III)/Al in the 66.7 to 33.3 m/o.
No takes yet. Share an insight, caveat, or question.
Liu et al. (1997) studied this question.