About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advancements in Molten Salt/Metal Technology in Energy Applications: From Atoms to Plants
|
| Presentation Title |
Electrochemical behavior of oxygen-evolving precious metal anodes in molten LiCl-Li2O electrolyte |
| Author(s) |
Md Ikram Khan, Hojong Kim |
| On-Site Speaker (Planned) |
Hojong Kim |
| Abstract Scope |
This work investigated precious group metals (Pt, Ir, and Ru) as an oxygen-evolving anode in molten LiCl-Li2O at 650°C for electrolytic reduction of metal oxides such as used nuclear oxide fuels (UO2) or transition metal oxides. Anodic polarization was conducted to compare the electrochemical behavior of the anodes via cyclic voltammetry and chronoamperometry. Constant potential electrolysis of each anode was implemented for 10-30 h to assess the anode performance during oxygen evolution and the dimensional change after electrolysis. Three-electrode cell was employed using two-phase Li-Bi (65-35 at%) alloy as the reference electrode (RE) and nickel oxide (NiO) powder as the cathode. The Li-Bi alloy RE was calibrated relative to pure Li and its stability was assessed by measuring the potential difference between the nominally identical alloy compositions. The cathodic products were characterized to confirm the electrolytic reduction reaction of NiO into Ni and estimate the cathodic coulombic efficiencies. |