The Electrochemical Behavior of Tellurium Tetrachloride in LiCl-KCl Eutectic Molten Salt at 450 ºC

Day, Brandon C.; Zillinger, James; Utgikar, Vivek; Raja, Krishnan S.

doi:10.1149/1945-7111/abfeff

Title: The Electrochemical Behavior of Tellurium Tetrachloride in LiCl-KCl Eutectic Molten Salt at 450 ºC

Journal Article · Sat May 01 00:00:00 EDT 2021 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1945-7111/abfeff· OSTI ID:1850530

Day, Brandon C.; Zillinger, James; Utgikar, Vivek;

Cyclic voltammetry CV), square wave voltammetry (SWV), and electrochemical impedance spectroscopy measurements were carried out in 1 and 5 wt% TeCl₄containing LiCl-KCl eutectic molten salt at 450 °C using tungsten and glassy carbon as working electrodes. Reduction of Te(IV) to Te(0) occurred in three steps at potentials more negative than -0.4 V_Ag/AgCl. The Te(0) was further reduced to Te^2-at more negative potentials. Formation of Te^2-was observed at potentials more negative than -2.2 V_Ag/AgCl. Diffusivities of Te⁴⁺, Te²⁺, and Te^2-and their formal potentials were estimated from the CV data. The diffusion coefficients of Te⁴⁺, Te²⁺and Te^2-were 0.9 × 10^-5, 3.8 × 10^-5, and 1.5 × 10^-5cm²s^-1, respectively in the 1 wt% TeCl₄containing LiCl-KCl molten salt. The diffusivity of Te species generally decreased with increase in the concentration of TeCl₄.

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Research Organization:: Univ. of Idaho, Moscow, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

DOE Contract Number:: NE0008695

OSTI ID:: 1850530

Journal Information:: Journal of the Electrochemical Society, Vol. 168, Issue 5; ISSN 0013-4651

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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