Abstract
The electrochemistry of Te(IV) chloride in basic aluminum chloride-1-methyl-3-ethylimidazolium chloride molten salt was investigated at a glassy carbon electrode at 30°C. Absorption spectroscopy and titration experiments suggest that tellurium(IV) chloride is complexed as [TeCl6]2- in these melts. [TeCl6]2- can be reduced to elemental tellurium via a four-electron process. The nucleation process for the electrodeposition of Te from reduction of [TeCl6]2- exhibits characteristics indicative of kinetic control. Elemental Te can be further reduced to a Te(-II) species which undergoes a reaction with Te(IV) to form Te. Elemental Te can also be electrodeposited from oxidation of Te(-II). This process proceeds via 3D progressive nucleation with diffusion-controlled growth. The average Stokes-Einstein products for [TeCl6]2- and Te(-II) species are 1.7 × 10-10 and 3.6 × 10-10 g cm s-2 K-1, respectively.
Original language | English |
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Pages (from-to) | 2369-2374 |
Number of pages | 6 |
Journal | Journal of the Electrochemical Society |
Volume | 144 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1997 Jul |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry