| Autor: |
Zavarzin, S., Maslennikov, A., Gedgovd, K., Bulatov, D. |
| Předmět: |
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| Zdroj: |
Radiochemistry; Nov2016, Vol. 58 Issue 6, p591-597, 7p |
| Abstrakt: |
The electrochemical properties of URu intermetallic compound (IMC) in 0.5-8 M HNO solutions were studied by linear voltammetry and galvanostatic electrolysis. In 0.5-2 M HNO, URu occurs in the passive state at potentials lower than +1.3 V (here and hereinafter, vs. SHE), and in 4-8 M HNO, 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, URu 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 HNO concentration and reaches 35 mg cm h in 6 M HNO at a current density of 182 mA cm. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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