Electrochemical preparation and spectroelectrochemical study of neptunium chloride complexes in LiCl–KCl eutectic melts

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• 作者：Dae-Hyeon Kim ; Tae-Hong Park ; Sang-Eun Bae…
• 关键词：Neptunium ; Molten salt ; Transuranium ; Pyroprocess ; Spectroelectrochemical technique
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：308
• 期：1
• 页码：31-36
• 全文大小：1,061 KB
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• 作者单位：Dae-Hyeon Kim (1) (2)
  Tae-Hong Park (1)
  Sang-Eun Bae (1) (3)
  Nari Lee (1) (4)
  Jong-Yun Kim (1) (3)
  Young-Hwan Cho (1)
  Jei-Won Yeon (1) (3)
  Kyuseok Song (1)
  
  1. Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
  2. Department of Chemistry, Korea University, Seoul, 339-700, Republic of Korea
  3. University of Science and Technology, Daejeon, 305-350, Republic of Korea
  4. Department of Chemistry, Chungbuk National Unviersity, Cheongju, Chungbuk, 361-763, Republic of Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nuclear Chemistry
  Physical Chemistry
  Nuclear Physics, Heavy Ions and Hadrons
  Diagnostic Radiology
  Inorganic Chemistry
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1588-2780

文摘

We prepared neptunium chloride complexes electrochemically and performed spectroelectrochemical measurements of neptunium ions in LiCl–KCl eutectic melts at 450 °C, where the neptunium concentrations studied were in the range of 0.1–1 mM. We observed a highly absorbing f–d transition band of Np3+ at 383 nm, which was used to determine an formal potential of the Np4+|Np3+ redox couple (E°′ = 0.45 V vs. Ag|Ag+) with a solution of concentration as low as ~0.1 mM. This result agreed well with the value (E°′ = 0.42 V vs. Ag|Ag+) determined by cyclic voltammetry with a ~15 mM solution.