Work

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

Year: 2021

Type: article

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.

Source: Journal of The Electrochemical Society

DOI: 10.1149/1945-7111/ac208e

Authors: Chao Zhang, Devin Rappleye, Art Nelson, Scott Simpson, Michael Simpson

Institutions: Lawrence Livermore National Laboratory, University of Utah

Language: English

Topic: Molten salt chemistry and electrochemical processes

Subfield: Electrochemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: bronze

Funders: U.S. Department of Energy, Lawrence Livermore National Laboratory

Awards: G1356433355, G2145270357, G3669113783, G895790057, G991281326