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Electrode processes in the KF-AlF3-Al2O3 melt
Автор | Падамата, С. К. | |
Автор | Ясинский, А. С. | |
Автор | Поляков, П. В. | |
Дата внесения | 2021-08-13T09:31:58Z | |
Дата, когда ресурс стал доступен | 2021-08-13T09:31:58Z | |
Дата публикации | 2020-04 | |
Библиографическое описание | Падамата, С. К. Electrode processes in the KF-AlF3-Al2O3 melt [Текст] / С. К. Падамата, А. С. Ясинский, П. В. Поляков // New Journal of Chemistry. — 2020. — С. 5152-5164 | |
ISSN | 11440546 | |
URI (для ссылок/цитирований) | https://pubs.rsc.org/en/content/articlelanding/2020/nj/d0nj00016g#!divAbstract | |
URI (для ссылок/цитирований) | https://elib.sfu-kras.ru/handle/2311/142683 | |
Аннотация | The kinetics of anodic and cathodic processes in KF-AlF3 and KF-AlF3-Al2O3 melts obtained by means of stationary polarization and cyclic voltammetry have been studied. Studies were conducted at different cryolite ratios [CRs, (moles of KF)/(moles of AlF3)] and different alumina contents at 700-800 °C for the Cu-Al anode and at 800 °C for the tungsten cathode. The limiting current density of oxygen evolution on the Cu-Al anode was 0.31 A cm-2 at 700 °C and CR = 1.4. It drastically increases with CR and temperature. The limiting current density of aluminium reduction on the W cathode was in the range 0.45-0.50 A cm-2. The cathodic process is diffusion-controlled while the anodic one shows mixed kinetics. The diffusion and mass transfer coefficients for the cathodic process (W electrode) and the mass transfer coefficient for the anodic process (Cu-Al electrode) were determined. Based on the obtained results, the electrolysis of 1.4KF-AlF3-Al2O3(sat) with the Cu-Al anode and W cathode was performed. The aluminium purity was determined using an optical emission spectrometer. The XRD and SEM-EDX methods were used to study the phases formed on the anode surface. © 2020 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. | |
Название | Electrode processes in the KF-AlF3-Al2O3 melt | |
Тип | Journal Article | |
Тип | Journal Article Preprint | |
Страницы | 5152-5164 | |
Дата обновления | 2021-08-13T09:31:58Z | |
DOI | 10.1039/d0nj00016g | |
Подразделение | Научно-исследовательская часть | |
Журнал | New Journal of Chemistry | |
Квартиль журнала в Scopus | Q1 | |
Квартиль журнала в Web of Science | Q2 |