Electrochemical properties and dissolution of UPd3 in nitric acid solutions
- Authors: Zavarzin S.V.1, Maslennikov A.G.2, Gedgovd K.N.3, Bulatov G.S.3, Vlasova I.E.4
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Affiliations:
- Leading Research Institute of Rosatom State Corporation for Chemical Technologies
- Bochvar High-Tech Research Institute of Inorganic Materials
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Moscow State University
- Issue: Vol 58, No 5 (2016)
- Pages: 466-472
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/223496
- DOI: https://doi.org/10.1134/S1066362216050040
- ID: 223496
Cite item
Abstract
Electrochemical properties of the intermetallic compound UPd3 in 0.5–8 M HNO3 solutions were studied by linear voltammetry. In 0.5–2 M HNO3 solutions, the UPd3 surface is in the passive state. At HNO3 concentrations exceeding 4 M, the alloy passivation was not observed. The previously unknown electrochemical characteristics of UPd3 in nitric acid solutions were obtained using the Tafel equation. The values of Е(i = 0) and vcorr increased from 39 mV and 38 μg cm–2 h–1 in 0.5 M HNO3 to 821 mV and 11 mg cm–2 h–1 in 8 M HNO3, respectively. Dissolution experiments have shown that UPd3 can dissolve in HNO3 solutions of concentration exceeding 4 M at room temperature. In 8 M HNO3, the dissolution rate can reach 17 mg cm–2 h–1 at 25°С, with the dissolution being virtually equimolar and accelerating with time.
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 Research Institute of Inorganic Materials
Email: info@vniiht.ru
Russian Federation, ul. Rogova 5a, Moscow, 123098
K. N. Gedgovd
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: info@vniiht.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 199071
G. S. Bulatov
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: info@vniiht.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 199071
I. E. Vlasova
Moscow State University
Email: info@vniiht.ru
Russian Federation, Moscow