Cited by 33Molten salt chemistry and electrochemical processesMetallurgical Processes and ThermodynamicsElectrochemical Analysis and Applications

Electroanalytical Measurements of Oxide Ions in Molten CaCl 2 on W electrode

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Zhang, Chao, Rappleye, Devin, Nelson, Art, Simpson, Scott, Simpson, Michael·2021·Journal of The Electrochemical Society

Abstract

The electrochemical interaction of oxide ions with tungsten electrodes in molten calcium chloride (CaCl 2 ) was analyzed by combining electroanalytical techniques with X-ray photoelectron spectroscopy. During a cyclic voltammetry (CV) scan, the oxide ions appear to interact with the tungsten working electrode via a multi-step oxidation and reduction process. The overall redox peaks behave reversibly up to 750 mV s −1 . This electrochemical process enables the oxide ion concentration to be correlated to CV oxidation peaks. The resulting correlation agrees well (8.8% difference) with back titration measurements and can be used to monitor oxide content in the salt in real-time during CaCl 2 based pryoprocesses.

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  1. [4]4. D. A. Wenz, I. Johnson, and R. D. Wolson, "CaCl 2 -rich region of the CaCl 2 -CaF 2 -CaO system." J. Chem. Eng. Data, 14, 250 (1969).
  2. [5]5. G. S. Perry and L. G. Macdonald, "Role of CaCl 2 in the reduction of PuO 2 ." J. Nucl. Mater., 130, 234 (1985).
  3. [39]39. M. W. Chase, (1998), JANAF Thermochemical Tables, NIST Standard Reference Database 13, NIST-JANAF Thermochemical Tables, 10.18434/T42S31. · DOI

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Authors
Zhang, C., Rappleye, D., Nelson, A., Simpson, S., & Simpson, M.
Affiliations
  • Lawrence Livermore National Laboratory (US)
  • University of Utah (US)
Corresponding author
Zhang, Chao
Venue
Journal of The Electrochemical Society
Published
2021-09-01
Volume
168
Issue
9
Pages
097502
ISSN
  • 0013-4651 (ISSN-L)
  • 1945-7111
OpenAlex
W3196233938
Cited by
33
References
53
Citations by year
2026: 6 · 2025: 8 · 2024: 8 · 2023: 5 · 2022: 4 · 2021: 2
FWCI
2.10
Type
journal article
Language
en
Open access
Locations
  • Journal of The Electrochemical Society (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
Lawrence Livermore National Laboratory (DE-AC52-07NA27344)
Topics
  • Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Molten salt chemistry and electrochemical processes
  • Physical Sciences › Engineering › Mechanical Engineering › Metallurgical Processes and Thermodynamics
  • Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
Keywords
oxide ions, molten calcium chloride, tungsten electrode, electrochemical redox, cyclic voltammetry, real-time monitoring, pyroprocessing, molten salt electrolysis, X-ray photoelectron spectroscopy

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