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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry IV
Presentation Title Electrochemical Reactions of Oxide Ions with Tungsten in Molten CaCl<sub>2</sub>
Author(s) Chao Zhang, Devin Rappleye, Michael F. Simpson
On-Site Speaker (Planned) Michael F. Simpson
Abstract Scope In support of development of a real time electrochemical sensor for measuring oxide ion concentrations in molten CaCl<sub>2</sub>, cyclic voltammetry was run in molten CaCl<sub>2</sub> with controlled additions of CaO. The magnitude of an oxidation peak at close to 0 V versus a W quasi-reference electrode correlated linearly with concentration of added CaO. The reaction mechanism appears to consist of two electrochemical steps followed by a chemical reaction to form CaWO<sub>4</sub>, which is soluble in the salt. These findings are beneficial to controlling electrochemical nuclear material processing such as direct oxide reduction of actinides. A simple probe consisting of three W rods can be used to monitor CaO concentration in real time.
Proceedings Inclusion? Planned:


A Comparative Study of Working Electrode Materials for Voltammetry Measurements in LiCl–Li2O Salts
Advances in Solid Oxide Membrane Based Electrolysis for Solar-grade Silicon Deposition
Effect of Hydroxide and Oxide Impurities in Electrochemical Processes Using Molten LiCl and CaCl2
Electrochemical Reactions of Oxide Ions with Tungsten in Molten CaCl2
Feasibility of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt
First-principles Molecular Dynamics and CALPHAD Modeling of the CaF2-MgF2-SiO2 Molten Salt System
Fundamental Challenges for the Development of Electrolytic Reduction of Uranium Oxide in Molten LiCl-Li2O
High-speed Electrodeposition of Textured Monolithic Lithiated Transition Metal Oxide Cathodes for Low Cost, High Energy, and Fast Charging Li-ion Batteries.
Interaction between Solute Species and Metallic Alloying Elements in Molten Chloride Systems
Investigation on Preparation of Fe-Al Alloys by Direct Reduction of Fe2O3-Al2O3 Powder in CaCl2-NaCl Molten Salt System
Liquid Bipolar Electrode for Extraction of Aluminium and PGM Concentrate from Spent Catalysts
Molten Hydroxide Mediated Electrosynthesis of Layered Transition Metal Oxides for Electrochemical Energy Storage
New Electrochemical Deoxidation Method of Ti Metal in Molten Salts Containing YCl3
Optimizing Reaction Selectivity in High Temperature Molten Electrolytes
Selective Extraction of Gold from Gold-copper Alloy Using Anodic Electrochemical Deposition in Molten Salt Electrolyte
Validated Modeling of Quartzite Reduction to Solar Silicon by Molten Salt Electrolysis

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