Keywords
molten salt, tungsten, calcium chloride, oxide, cyclic voltammetry, electrochemistry
Abstract
The electrochemical interaction of oxide ions with tungsten electrodes in molten calcium chloride (CaCl2) 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. 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 CaCl2 based pryoprocesses.
Original Publication Citation
Zhang, C., Rappleye, D., Nelson, A., Simpson, S., & Simpson, M. (2021). Electroanalytical Measurements of Oxide Ions in Molten CaCl2 on W electrode. Journal of The Electrochemical Society, 168(9), 097502. https://doi.org/10.1149/1945-7111/ac208e
BYU ScholarsArchive Citation
Rappleye, Devin; Zhang, Chao; Nelson, Art; Simpson, Scott; and Simpson, Michael, "Electroanalytical Measurements of Oxide Ions in Molten CaCl2 on W electrode" (2021). Faculty Publications. 5898.
https://scholarsarchive.byu.edu/facpub/5898
Document Type
Peer-Reviewed Article
Publication Date
2021-09-02
Permanent URL
http://hdl.lib.byu.edu/1877/8627
Publisher
The Electrochemical Society
Language
English
College
Ira A. Fulton College of Engineering
Department
Chemical Engineering
Copyright Status
© 2021 The Electrochemical Society. All rights reserved. This is the author's submitted version of this article. The definitive version can be found at https://doi.org/10.1149/1945-7111/ac208e
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