Electrochemistry of tellurium(IV) in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride room temperature molten salt

Eric Gi Shong Jeng; I. Wen Sun

doi:10.1149/1.1837820

Electrochemistry of tellurium(IV) in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride room temperature molten salt

Eric Gi Shong Jeng, I. Wen Sun

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

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
Pages (from-to)	2369-2374
Number of pages	6
Journal	Journal of the Electrochemical Society
Volume	144
Issue number	7
DOIs	https://doi.org/10.1149/1.1837820
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

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title = "Electrochemistry of tellurium(IV) in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride room temperature molten salt",

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.",

author = "Jeng, {Eric Gi Shong} and Sun, {I. Wen}",

year = "1997",

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AU - Jeng, Eric Gi Shong

AU - Sun, I. Wen

PY - 1997/7

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N2 - 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.

AB - 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.

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Electrochemistry of tellurium(IV) in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride room temperature molten salt

Abstract

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