Electrochemical Behavior of Telluride Ions (Te                         2-                         ) in Molten LiCl-Li                         2                         Te Solution at 650 °c

Timothy Lichtenstein; Nadia A. Elbaar; Takanari Ouchi; Hojong Kim

doi:10.1021/acs.inorgchem.8b03073

Electrochemical Behavior of Telluride Ions (Te ^2- ) in Molten LiCl-Li ₂ Te Solution at 650 °c

Timothy Lichtenstein, Nadia A. Elbaar, Takanari Ouchi, Hojong Kim

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Abstract

The electrochemical behavior of Te ^2- ions was investigated in the LiCl-Li ₂ Te binary on glassy carbon electrodes at 650 °C as a means to understand the fundamental thermodynamic and mass transport properties of Te ^2- ions. Cyclic voltammetry and constant-potential electrolysis confirmed an electrochemically reversible, two-electron soluble-insoluble reaction of Te ^2- /Te(l). The formal potential for the Te ^2- /Te(l) reaction was determined to be 1.744 V vs Li ⁺ /Li(l), and the diffusivity of Te ^2- ions was about 0.44-1.25 × 10 ^-5 cm ² s ^-1 . The low value for diffusivity relative to those of other cations in molten salts suggests the possibility of forming complex ions such as [Li ₈ Te] ⁶⁺ due to strong chemical interactions with Li ⁺ ions in the electrolyte. The anodic polarization of Te(l) indicated that the formation of TeCl ₂ (g) and the cathodic polarization of Te(l) involved the codeposition of Li metal into the Te(l). The results of this work provide essential knowledge in developing electrochemical processes for separation of tellurium as well as in mitigating the degradation reactions with structural materials.

Original language	English (US)
Pages (from-to)	1548-1554
Number of pages	7
Journal	Inorganic chemistry
Volume	58
Issue number	2
DOIs	https://doi.org/10.1021/acs.inorgchem.8b03073
State	Published - Jan 22 2019

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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Lichtenstein, T., Elbaar, N. A., Ouchi, T., & Kim, H. (2019). Electrochemical Behavior of Telluride Ions (Te ^2- ) in Molten LiCl-Li ₂ Te Solution at 650 °c Inorganic chemistry, 58(2), 1548-1554. https://doi.org/10.1021/acs.inorgchem.8b03073

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title = " Electrochemical Behavior of Telluride Ions (Te 2- ) in Molten LiCl-Li 2 Te Solution at 650 °c ",

abstract = " The electrochemical behavior of Te 2- ions was investigated in the LiCl-Li 2 Te binary on glassy carbon electrodes at 650 °C as a means to understand the fundamental thermodynamic and mass transport properties of Te 2- ions. Cyclic voltammetry and constant-potential electrolysis confirmed an electrochemically reversible, two-electron soluble-insoluble reaction of Te 2- /Te(l). The formal potential for the Te 2- /Te(l) reaction was determined to be 1.744 V vs Li + /Li(l), and the diffusivity of Te 2- ions was about 0.44-1.25 × 10 -5 cm 2 s -1 . The low value for diffusivity relative to those of other cations in molten salts suggests the possibility of forming complex ions such as [Li 8 Te] 6+ due to strong chemical interactions with Li + ions in the electrolyte. The anodic polarization of Te(l) indicated that the formation of TeCl 2 (g) and the cathodic polarization of Te(l) involved the codeposition of Li metal into the Te(l). The results of this work provide essential knowledge in developing electrochemical processes for separation of tellurium as well as in mitigating the degradation reactions with structural materials.",

author = "Timothy Lichtenstein and Elbaar, {Nadia A.} and Takanari Ouchi and Hojong Kim",

note = "Funding Information: This work was supported by the US National Science Foundation (Grant CMMI-1662817), and US Department of Energy, Office of Nuclear Energy{\textquoteright}s Integrated University Program Graduate Fellowship (Award DE-NE0000113). Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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doi = "10.1021/acs.inorgchem.8b03073",

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Lichtenstein, T, Elbaar, NA, Ouchi, T & Kim, H 2019, ' Electrochemical Behavior of Telluride Ions (Te ^2- ) in Molten LiCl-Li ₂ Te Solution at 650 °c ', Inorganic chemistry, vol. 58, no. 2, pp. 1548-1554. https://doi.org/10.1021/acs.inorgchem.8b03073

Electrochemical Behavior of Telluride Ions (Te ^2- ) in Molten LiCl-Li ₂ Te Solution at 650 °c . / Lichtenstein, Timothy; Elbaar, Nadia A.; Ouchi, Takanari et al.
In: Inorganic chemistry, Vol. 58, No. 2, 22.01.2019, p. 1548-1554.

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

TY - JOUR

T1 - Electrochemical Behavior of Telluride Ions (Te 2- ) in Molten LiCl-Li 2 Te Solution at 650 °c

AU - Lichtenstein, Timothy

AU - Elbaar, Nadia A.

AU - Ouchi, Takanari

AU - Kim, Hojong

N1 - Funding Information: This work was supported by the US National Science Foundation (Grant CMMI-1662817), and US Department of Energy, Office of Nuclear Energy’s Integrated University Program Graduate Fellowship (Award DE-NE0000113). Publisher Copyright: © 2019 American Chemical Society.

PY - 2019/1/22

Y1 - 2019/1/22

N2 - The electrochemical behavior of Te 2- ions was investigated in the LiCl-Li 2 Te binary on glassy carbon electrodes at 650 °C as a means to understand the fundamental thermodynamic and mass transport properties of Te 2- ions. Cyclic voltammetry and constant-potential electrolysis confirmed an electrochemically reversible, two-electron soluble-insoluble reaction of Te 2- /Te(l). The formal potential for the Te 2- /Te(l) reaction was determined to be 1.744 V vs Li + /Li(l), and the diffusivity of Te 2- ions was about 0.44-1.25 × 10 -5 cm 2 s -1 . The low value for diffusivity relative to those of other cations in molten salts suggests the possibility of forming complex ions such as [Li 8 Te] 6+ due to strong chemical interactions with Li + ions in the electrolyte. The anodic polarization of Te(l) indicated that the formation of TeCl 2 (g) and the cathodic polarization of Te(l) involved the codeposition of Li metal into the Te(l). The results of this work provide essential knowledge in developing electrochemical processes for separation of tellurium as well as in mitigating the degradation reactions with structural materials.

AB - The electrochemical behavior of Te 2- ions was investigated in the LiCl-Li 2 Te binary on glassy carbon electrodes at 650 °C as a means to understand the fundamental thermodynamic and mass transport properties of Te 2- ions. Cyclic voltammetry and constant-potential electrolysis confirmed an electrochemically reversible, two-electron soluble-insoluble reaction of Te 2- /Te(l). The formal potential for the Te 2- /Te(l) reaction was determined to be 1.744 V vs Li + /Li(l), and the diffusivity of Te 2- ions was about 0.44-1.25 × 10 -5 cm 2 s -1 . The low value for diffusivity relative to those of other cations in molten salts suggests the possibility of forming complex ions such as [Li 8 Te] 6+ due to strong chemical interactions with Li + ions in the electrolyte. The anodic polarization of Te(l) indicated that the formation of TeCl 2 (g) and the cathodic polarization of Te(l) involved the codeposition of Li metal into the Te(l). The results of this work provide essential knowledge in developing electrochemical processes for separation of tellurium as well as in mitigating the degradation reactions with structural materials.

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JO - Inorganic chemistry

JF - Inorganic chemistry

IS - 2

ER -

Electrochemical Behavior of Telluride Ions (Te ^2- ) in Molten LiCl-Li ₂ Te Solution at 650 °c

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