Flow electrolysis of U, Np and Pu ions utilizing electrocatalysis at a column electrode with platinized glassy carbon fiber working electrode

Kitatsuji, Yoshihiro ; Kimura, Takaumi ; Kihara, Sorin*

Redox reactions of U, Np and Pu ions of various oxidation states were investigated by flow electrolysis at a column electrode (CE) equipped with a platinized glassy carbon (GC) fiber working electrode (Pt/GC-WE), and compared with those observed at the CE with an ordinary activated GC fiber working electrode (GC $_{rm act}$ -WE). Since the overpotential for the reduction of NpO $_{2}$ $^{+}$ and PuO $_{2}$ $^{+}$ were decreased when Pt/GC-WE was employed, the one-electron reduction of NpO $_{2}$ $^{+}$ to Np $^{4+}$ followed by that of Np $^{4+}$ to Np $^{3+}$ and the one-step three-electron reduction of PuO $_{2}$ $^{2+}$ to Pu $^{3+}$ proceeded at the CE with Pt/GC-WE, different from the reduction processes of NpO $_{2}$ $^{+}$ and PuO $_{2}$ $^{2+}$ at the CE with GC $_{rm act}$ -WE. A rapid and precise method for the preparation of U, Np and Pu ion of a desired oxidation state was proposed by taking advantage of the unique characteristics of the CE with Pt/GC-WE.

Language	:	English
Journal	:	Electrochimica Acta
Volume	:	74
Number	:
Pages	:	p.215 - 221
Publication Year/Month	:	2012/07
Meeting title	:
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Patent information	:
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Paper URL	:	https://doi.org/10.1016/j.electacta.2012.04.055
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	プルトニウム研究1棟
Press Release	:
Article of JAEA R&D Review	:	Controlling Valences by Electrocatalysis of Pt Particles; Rapid and Selective Valence-Control Method for Actinide[/]
Cooperating Institute	:	京都工芸繊維大学

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Registration No. : AA20120066
JAEA Abstracts No. : 40000779
Paper Submission No. : 10756

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