Electrochemical properties of noble metal anodes for electrolytic reduction of uranium oxide

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• 作者：Sung-Wook Kim ; Sang-Kwon Lee ; Hyun Woo Kang…
• 关键词：Pyroprocessing ; Electrochemistry ; Electrolytic reduction ; Anode ; Noble metal ; Gold
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：311
• 期：1
• 页码：809-814
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1588-2780
• 卷排序：311

文摘

Noble metals (Rh, Pd, Ir, and Au) were investigated as O₂-evolving anodes for electrolytic reduction of UO₂ in LiCl–Li₂O molten salt to replace Pt anodes, which are gradually consumed owing to Li₂PtO₃ layer formation. Anodic behaviors of these metals were examined by cyclic voltammetry. Au only showed O₂ evolution in a moderate potential range without side reactions, suggesting better electrochemical stability relative to Pt anodes. With Au anodes, UO₂ was electrochemically reduced to metallic U. No oxide layer was observed on the surface after the reduction. However, local dissolution remains a potential issue from a stability viewpoint.