Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub>
The electrochemical behavior of rhenium ions in the molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> salt was systematically studied, and pure metallic rhenium was obtained at the cathode. The processes of rhenium ions reduction and diffusion in molten KF-KBF&...
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| author | Aleksandr A. Chernyshev Stepan P. Arkhipov Alexey P. Apisarov Aleksander S. Shmygalev Andrey V. Isakov Yury P. Zaikov |
| author_facet | Aleksandr A. Chernyshev Stepan P. Arkhipov Alexey P. Apisarov Aleksander S. Shmygalev Andrey V. Isakov Yury P. Zaikov |
| author_sort | Aleksandr A. Chernyshev |
| collection | DOAJ |
| description | The electrochemical behavior of rhenium ions in the molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> salt was systematically studied, and pure metallic rhenium was obtained at the cathode. The processes of rhenium ions reduction and diffusion in molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> were determined using cyclic voltammetry, stationary galvanostatic and polarization curves analyses. The values of diffusion coefficients were 3.15 × 10<sup>−5</sup> cm<sup>2</sup>/s and 4.61 × 10<sup>−5</sup> cm<sup>2</sup>/s for R<sub>1</sub> and R<sub>2,</sub> respectively. Rhenium electrodeposition was carried out at a constant potential. The process of rhenium cathode reduction in KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> at 773 K was found to be a one-step reaction Re(VII) → Re, and rhenium electrodeposition presumably occurred from two types of complex rhenium ions (KReO<sub>4</sub> and K<sub>3</sub>ReO<sub>5</sub>). Both processes are quasi-reversible and controlled by diffusion. The obtained cathode deposit was analyzed by SEM, EDX, ICP-OES and XRD methods. The obtained deposit had a thread structure and rhenium was the main component. |
| first_indexed | 2024-03-09T17:41:19Z |
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| issn | 1996-1944 |
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| last_indexed | 2024-03-09T17:41:19Z |
| publishDate | 2022-12-01 |
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| series | Materials |
| spelling | doaj.art-17b6640394e54ae98853d4afbc8c91552023-11-24T11:32:19ZengMDPI AGMaterials1996-19442022-12-011523867910.3390/ma15238679Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub>Aleksandr A. Chernyshev0Stepan P. Arkhipov1Alexey P. Apisarov2Aleksander S. Shmygalev3Andrey V. Isakov4Yury P. Zaikov5Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya Street, 620066 Ekatherinburg, RussiaThe electrochemical behavior of rhenium ions in the molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> salt was systematically studied, and pure metallic rhenium was obtained at the cathode. The processes of rhenium ions reduction and diffusion in molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> were determined using cyclic voltammetry, stationary galvanostatic and polarization curves analyses. The values of diffusion coefficients were 3.15 × 10<sup>−5</sup> cm<sup>2</sup>/s and 4.61 × 10<sup>−5</sup> cm<sup>2</sup>/s for R<sub>1</sub> and R<sub>2,</sub> respectively. Rhenium electrodeposition was carried out at a constant potential. The process of rhenium cathode reduction in KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub> at 773 K was found to be a one-step reaction Re(VII) → Re, and rhenium electrodeposition presumably occurred from two types of complex rhenium ions (KReO<sub>4</sub> and K<sub>3</sub>ReO<sub>5</sub>). Both processes are quasi-reversible and controlled by diffusion. The obtained cathode deposit was analyzed by SEM, EDX, ICP-OES and XRD methods. The obtained deposit had a thread structure and rhenium was the main component.https://www.mdpi.com/1996-1944/15/23/8679cathodic behaviorrheniumelectrochemical analysismolten salts |
| spellingShingle | Aleksandr A. Chernyshev Stepan P. Arkhipov Alexey P. Apisarov Aleksander S. Shmygalev Andrey V. Isakov Yury P. Zaikov Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> Materials cathodic behavior rhenium electrochemical analysis molten salts |
| title | Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> |
| title_full | Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> |
| title_fullStr | Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> |
| title_full_unstemmed | Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> |
| title_short | Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF<sub>4</sub>-B<sub>2</sub>O<sub>3</sub>-KReO<sub>4</sub> |
| title_sort | rhenium electrodeposition and its electrochemical behavior in molten kf kbf sub 4 sub b sub 2 sub o sub 3 sub kreo sub 4 sub |
| topic | cathodic behavior rhenium electrochemical analysis molten salts |
| url | https://www.mdpi.com/1996-1944/15/23/8679 |
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