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Ouchi, Kazuki
Hosha Kagaku, (49), p.3 - 7, 2024/03
I introduce the elucidation of the deposition following the oxidation state of uranium and the electrochemical behavior of uranium(IV) chloride in an ionic liquid-organic mixture, as a basic study of in-solution reactions. In addition, I introduce the development of separation methods for actinides using a microchemical chip and polyacrylamide gel electrophoresis, as an applied study for quantitative analytical methods for small amounts of samples.
Shirai, Osamu; Iwai, Takashi; Suzuki, Yasufumi; Sakamura, Y.*; *
Journal of Alloys and Compounds, 271-273, p.685 - 688, 1998/00
Times Cited Count：85 Percentile：94.83(Chemistry, Physical)no abstracts in English
Yoshida, Zenko; Aoyagi, Hisao; ; Takeishi, Hideyo; Sasaki, Yuji; Uno, Seiichiro; Tachikawa, Enzo
Journal of Alloys and Compounds, 213-214, p.453 - 455, 1994/00
Times Cited Count：8 Percentile：57.7(Chemistry, Physical)no abstracts in English
;
J.Electroanal.Chem., 95(2), p.159 - 168, 1979/00
Times Cited Count：25no abstracts in English
;
J.Electroanal.Chem., 86, p.167 - 177, 1978/00
Times Cited Count：21no abstracts in English
Kitatsuji, Yoshihiro; Ouchi, Kazuki; Otobe, Haruyoshi; Kihara, Sorin*
no journal, ,
Electrolytic reduction of neptunium ion in the weak acidic solution was investigated. On the cyclic voltammogram of Np(V) in the solution of pH 3.8, reduction and deposition of Np was observed. Stripping current due to oxidation of deposited Np was also appeared. Stripping voltammetry after preelectrolysis at definite potential was carried out. Stripping currents were almost constant despite variation of preelectrolysis time and concentration of Np(V). Difference of reduction-deposition behavior between U and Np was discussed.
Kitatsuji, Yoshihiro; Ouchi, Kazuki; Otobe, Haruyoshi
no journal, ,
Electrolytic reduction of actinide ions in the weak acidic solution was investigated by focusing the relation between redox and aggregation of the ions. Constant potential electrolysis of uranium (VI) ion was carried out using Au electrode. It was found that U(VI) was rapidly reduced to U(V) and further reduction to U(IV) was not observed at the beginning of electrolysis when acidity of the solution was lower than pH 2. However, the reduction of U(V) to U(IV) is catalyzed by the reduction product which is U(IV) deposited on the electrode. Unlike uranium, the electrodeposition occurred quickly with electrode reduction of Np(V). Then the reduction of Np(V) was inhibited by formation of deposit layer on the electrode.
Ouchi, Kazuki; Otobe, Haruyoshi; Kitatsuji, Yoshihiro
no journal, ,
We investigated the behavior of deposition following the reduction of Np(V) as electrodeposition by measuring electrochemical quartz crystal microbalance in pH 3
4. Formation of Np deposits following the electrolytic reduction of Np (V) was confirmed at the more positive potential in the higher pH. From the relationship between the quantity of electricity of electrolytic reduction of Np(V) and the deposition in the pH 4 solution, we found that the specie of deposits is highly likely to be Np(IV) dioxide.
Ouchi, Kazuki
no journal, ,
I describe on the elucidation of the deposition following the oxidation state of uranium and the electrochemical behavior of uranium(IV) chloride in an ionic liquid-organic mixture, as a basic study of in-solution reactions. In addition, I describe on the development of separation methods for actinides using a microchemical chip and polyacrylamide gel electrophoresis, as an applied study for quantitative analytical methods for small amounts of samples.
