P 87 Potentiometric study of the interaction of Cr3+ and O2- ions in fused NaCl–2CsCl eutectic [Текст] / V. V. Smolenski, A. V. Novoselova, Ya. M. Luk’yanova, A. A. Mayorshin, A. G. Osipenko, M. V. Kormilitsyn // Electrochimica Acta. - 2010. - Vol. 55, № 17. - С. 4960-4963. - Bibliogr. : p. 4963 (23 ref.) . - ISSN 0013-4686 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ПОТЕНЦИОМЕТРИЧЕСКОЕ ТИТРОВАНИЕ -- РАСТВОРИМОСТЬ -- СТАНДАРТНЫЙ ПОТЕНЦИАЛ -- NaCl–2CsCl Аннотация: The physical and chemical properties of chromium chlorides have been studied in fused NaCl–2CsCl eutectic at the temperature range 843–1008 K using an electrochemical cell containing a platinum-oxygen electrode with solid electrolyte membrane, which was used as pO2? indicator electrode. The concentration of oxygen ions in the solution was modifying by dropping the calculated amount of BaO. Titration of Cr3+ chlorocomplex by O2? ions demonstrated the precipitation of CrOCl and Cr2O3. The solubility constants of these compounds were calculated. E–pO2? and three-dimensional E–pO2?–T type diagrams, which summarized the properties of chromium species in the melt, were determined.?? \\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Electrochimica Acta\\EA2010 V. 55, N 17. - P.4960-4963.pdf |
S 68 Smolenski, V. Electrochemistry of redox potential of the couple Tm3+/Tm2+ and the formation of a Tm–Al alloy in fused NaCl–2CsCl eutectic / V. Smolenski, A. Novoselova // Electrochimica Acta. - 2012. - Vol. 63. - С. 179-184. - Библиогр.: с. 184 (53 ref.) . - ISSN 0013-4686 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КОЭФФИЦИЕНТ ДИФФУЗИИ -- ЭЛЕКТРОВОССТАНОВЛЕНИЕ -- СТАНДАРТНЫЙ ПОТЕНЦИАЛ -- ЦИКЛИЧЕСКАЯ ВОЛЬТАМПЕРОМЕТРИЯ -- NaCl–2CsCl -- Tm3+/Tm2+ Аннотация: This work presents the electrochemical study of TmCl3 solutions in NaCl–2CsCl eutectic at the temperature range 823–973 K using inert and reactive electrodes, i.e. Mo and Al, respectively. On an inert electrode, Tm3+ ions are reduced to metallic thulium through two consecutive steps: Tm3+ + e− → Tm2+ and Tm2+ + 2e− → Tm. The electroreduction of Tm3+ to Tm2+ ions was found to be reversible at low scan rates being controlled by the rate of the mass transfer and irreversible at high scan range (>0.1 V s−1) being controlled by the rate of charge transfer. The diffusion coefficient of [TmCl6]3− complex ions was determined at different temperatures. Arrhenius law was verified by plotting the variation of the logarithm of the diffusion coefficient vs. reverse temperature. The apparent standard potential of the soluble-soluble redox system Tm3+/Tm2+ was obtained by cyclic voltammetry. The electrode reactions of Tm3+ solutions at an Al electrode were also investigated. The results showed that for the extraction of thulium from molten chlorides, the use of a reactive electrode made of aluminum leading to Al–Tm alloys seems to be a pertinent route |