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

Document Type

Peer-Reviewed Article

Publication Date

2021-09-02

Publisher

The Electrochemical Society

Language

English

College

Ira A. Fulton College of Engineering

Department

Chemical Engineering

University Standing at Time of Publication

Assistant Professor

Share

COinS