Influence of tetrabutylammonium chloride on the electrodeposition of indium from chloride solution on a glassy carbon electrode

Abstract

In this paper, the electrochemical reduction of indium on a glassy carbon electrode (GCE) in a chloride electrolyte in the presence of tetrabutylammonium chloride (TBACh) was studied using the rotating disk electrode method, chronoamperometry and scanning electron microscopy. It was found that the addition of TBACh inhibits the electroreduction of indium by increasing the activation energy of the process by 17 kJ mol-1 , and also shows leveling action at its low concentrations. The diffusion coefficient of indium (III) ions found from Levich equation at 25°C, was 4.93× 10-6 cm 2 s-1. The In 3+ diffusion coefficient determined using the Levich equation are consistent with the values determined by the Cottrell law and universal Stokes-Einstein equation. The addition of 10-4 M TBACh to the electrolyte reduces the diffusion coefficient to 2.13× 10-6 cm 2 s-1 .

Indium electrodeposition from indium(iii) methanesulfonate in DMSO

“…This plot shows a linear relation between the limiting currents and the square root of the various rotation rates, and the line intercepts the vertical axis at zero current. As the observed limiting currents in the LSVs are attributed to the reduction of indium(III) to indium(0), the slope of the Levich plot can be used to calculate the diffusion constant of the indium(III) species: 28,29 Differences can be attributed by variations in dynamic viscosity of the solution and the hydrodynamic radius of the indium species. 30 To further study the formation of indium(I) during stripping, a rotating ring disk electrode (RRDE) experiment was performed.…”