Electrochemical properties and dissolution of URu3 in nitric acid solutions
- Authors: Zavarzin S.V.1, Maslennikov A.G.2, Gedgovd K.N.3, Bulatov D.S.3
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Affiliations:
- Leading Research Institute of Rosatom State Corporation for Chemical Technologies
- Bochvar High-Tech Institute of Inorganic Materials
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Issue: Vol 58, No 6 (2016)
- Pages: 591-597
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/223610
- DOI: https://doi.org/10.1134/S1066362216060059
- ID: 223610
Cite item
Abstract
The electrochemical properties of URu3 intermetallic compound (IMC) in 0.5–8 M HNO3 solutions were studied by linear voltammetry and galvanostatic electrolysis. In 0.5–2 M HNO3, URu3 occurs in the passive state at potentials lower than +1.3 V (here and hereinafter, vs. SHE), and in 4–8 M HNO3, an anodic oxidation peak is observed at potentials from +1.0 to +1.2 V. This process, however, leads to IMC passivation and not to its dissolution. At potentials higher than +1.4 V, URu3 passes into the transpassive state and starts to actively dissolve. The principal possibility of electrochemical dissolution of IMC at potentials exceeding the transpassivation potential was demonstrated by galvanostatic electrolysis. The rate of uranium leaching during electrolysis depends to a greater extent on the current density than on the HNO3 concentration and reaches 35 mg cm–2 h–1 in 6 M HNO3 at a current density of 182 mA cm–2.
About the authors
S. V. Zavarzin
Leading Research Institute of Rosatom State Corporation for Chemical Technologies
Author for correspondence.
Email: info@vniiht.ru
Russian Federation, Kashirskoe sh. 33, Moscow, 115409
A. G. Maslennikov
Bochvar High-Tech Institute of Inorganic Materials
Email: ershov@ipc.rssi.ru
Russian Federation, ul. Rogova 5a, Moscow, 123060
K. N. Gedgovd
Frumkin Institute of Physical Chemistry and Electrochemistry
Author for correspondence.
Email: ershov@ipc.rssi.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071
D. S. Bulatov
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: ershov@ipc.rssi.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071