Центральная Научная Библиотека УрО РАН

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   K 79

    Kovalevskii, R. A.
    Transport properties of reduced forms of the solvent cations in molten alkali chlorides [Text] / R. A. Kovalevskii, V. V. Chebykin // Melts. - 1992. - V. 6, N 3. - P137-142. - Bibliogr.: 8 ref.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СВОЙСТВА ТРАНСПОРТНЫЕ -- РАСТВОРИТЕЛЬ -- ХЛОРИД ЩЕЛОЧНЫХ МЕТАЛЛОВ -- ХЛОРИД РАСПЛАВЛЕННЫЙ -- МЕТАЛЛЫ ЩЕЛОЧНЫЕ -- ПОЛЯРИЗАЦИЯ КАТОДНАЯ -- МЕТОД ХРОНОПОТЕНЦИОМЕТРИЧЕСКИЙ -- ХРОНОПОТЕНЦИОМЕТРИЯ -- КАТИОНЫ
Аннотация: Изучены транспортные характеристики восстановленных форм катионов растворителя в расплавленных хлоридах щелочных металлов методами исследования катодной поляризации индифферентного электрода и хронопотенциометрии с реверсированием тока из стационарного состояния. Предложено уравнение для расчета потоков восстановленных форм катионов растворителя в зависимости от потенциала и температуры, позволяющее определить вклад растворителя в процессах бестокового переноса металлов и рассчитать снижение выхода по току в результате восстановления растворителя при электролитическом получении активных металлов
The transport properties of the reduced forms of solvent ions in molten alkali chlorides are studied by the investigation methods of cathodic polarization of an inert anode and chronopotentiometry with current reversal from the stationary state. An equation is offered for calculating the fluxes of the reduced forms of the solvent cations as a function of the potential and temperature, which enables us to determine the contribution of the solvent to the currentless processes of metal transport and to calculate the decrease in the current output as a resalt of the reduction of the current during the electrolytic production of the reactive metals

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   K 71

    Komarov, V. E.
    Electrochemical behavior of uranium in molten chlorides and chloride-fluoride mixtures [Text] / V. E. Komarov, N. P. Borodina, V. S. Mityaev // Melts. - 1992. - V. 6, N 5. - P297-308. - Bibliogr.: 22 ref.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПОВЕДЕНИЕ ЭЛЕКТРОХИМИЧЕСКОЕ -- U -- ХЛОРИД РАСПЛАВЛЕННЫЙ -- РАСПЛАВ ХЛОРИДНО-ФТОРИДНЫЙ -- УРАН ТРЕХВАЛЕНТНЫЙ -- РАСПЛАВ ХЛОРИДНЫЙ
Аннотация: Представлены результаты термодинамических и кинетических исследований поведения трехвалентного урана в хлоридных и хлоридно-фторидных расплавах. Приведены выражения для зависимости электродных потенциалов урана от его содержания, температуры, катиона соли-растворителя и концентрации фторида щелочного металла. Получены уравнения для температурной зависимости значений коэффициентов диффузии в виде lgD = A + B/T. Изучено влияние температуры, катионного и анионного составов солевой среды на катодное осаждение урана
Results are presented of thermodinamic and kinetic investigations of the behavior of trivalent uranium in molten chlorides and chloride-fluoride mixtures. Expressions are presented for the dependence of the electrode potentials of uranium on its content, temperature, cation solvent salt, and the alkali-fluoride concentration. Equations are obtained for the temperature dependence of the diffusion coefficient in the form of log D=A+B/T. The effects of temperature, cation- and anion concentrations of the salt medium on the cathodic deposition of uranium are studied

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   I-60


    Influence of metal coordination on conductivity behavior in poly(butadiene-acrylonitrile)-CoCl2 system [Текст] / O. V. Bushkova, I. P. Koryakova, Yu. A. Skorik, B. I. Lirova, A. V. Pestov, V. M. Zhukovsky // Electrochimica Acta. - 2008. - Vol. 53, № 16. - С. 5322-5333.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SOLID POLYMER ELECTROLYTES -- POLY(BUTADIENE–ACRYLONITRILE) -- COBALT(II) COMPLEXES -- IONIC CONDUCTIVITY -- ELECTRONIC CONDUCTIVITY
Аннотация: The metal complex formation and the electrical properties of amorphous solid polymer electrolytes, based on poly(butadiene–acrylonitrile) copolymer (PBAN) and CoCl2, have been studied over the homogeneity region of the system limited by the CoCl2 concentration of 1.89 mol kg?1. It has been found that ionic conductivity is carried out by the unipolar anion transfer at lower CoCl2 concentrations (up to 0.10 mol kg?1). As the CoCl2 concentration increases, electronic conductivity appears in addition to ionic conductivity, and the former becomes dominant, starting from 0.38 mol kg?1. It has been shown that the nature of charge carriers is determined by the composition of metal complexes formed by CoCl2 and the macromolecular solvent PBAN. At lower concentrations, the [Co2L2Cl4]0 dimers are the predominant species (L being macromolecule side groups CN), and their dissociation is followed by the formation of mobile Cl? anions and immobile binuclear [Co2Cl3]+ complexes. As CoCl2 concentration increases, polynuclear [ConL2Cl2n]0 (n > 2) complexes appear (L being CN and CC groups of PBAN). Specific features of chemical bonds in ?-complexes of transition metals result in the appearance of electronic charge carriers. The abrupt increase in conductivity observed at the highest CoCl2 concentration is connected with the formation of a percolation network of polynuclear [ConL2Cl2n]0 complexes.????

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   Q 23


    Quantum-Chemical Study of Ion Association in Electrolyte Systems Containing LiAsF6 [Текст] / S. E. Popov, A. E. Nikiforov, O. V. Bushkova, V. M. Zhukovsky // Journal of Physical Chemistry A. - 2004. - Vol. 108, № 46. - С. 10280-10287. - Библиогр. : с. 10287 (20 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
LiAsF6 -- ELECTROLYTE
Аннотация: The possibility that ion clusters of different species are formed during dissolution of LiAsF6 in a low- or high-molecular-weight solvent has been studied. The Hessian matrix of clusters has been calculated by the numerical and analytical differentiation of their full energy in the MO LCAO approximation using the Roothaan?Hartree?Fock method and the PC GAMESS software package. It was found that stable ion clusters are represented by ion pairs Li+[AsF6]- with the bi- or tridentate coordination of the cation relative to the octahedral anion, triple ions [AsF6]-Li+[AsF6]- and Li+[AsF6]-Li+ with the bi- or tridentate coordination, ion dimers {Li+[AsF6]-}2 with the bidentate coordination, and also ion trimers {Li+[AsF6]-}3 and ion tetramers {Li+[AsF6]-}4 shaped as symmetric ring structures with the unidentate coordination. The frequencies and intensities of IR absorption bands of different species of ion clusters in the gaseous phase and nonaqueous solutions (acetone, ethanol, nitromethane, and tetrahydrofurane) have been calculated. This presents a basis for identification of ion particles during IR spectroscopic measurements in electrolyte solutions containing LiAsF6.

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   E 43


    Electrochemistry of ytterbium (III) in molten alkali metal chlorides / V. Smolenski, A. Novoselova, A. Osipenko, C. Caravaca, G. de Cordoba // Electrochimica Acta. - 2008. - Vol. 54, № 2. - С. 382-387. : рис. - Библиогр.: с. 386-387 (ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТЕРМОДИНАМИКА -- ИТТЕРБИЙ
Аннотация: This work presents the electrochemical study of Yb(III) ions in molten alkali metal chlorides in the temperature range 723–1073 K. Transient electrochemical techniques such as linear sweep, cyclic and square wave voltammetry, and potentiometry at zero current have been used to investigate the reduction mechanism, transport parameters and thermodynamic properties of the reaction YbCl2 + 1/2Cl2 = YbCl3 The results obtained show that the reduction reaction Yb(III) + e? Yb(II) is reversible being controlled by the rate of the mass transfer. The diffusion coefficient of [YbCl6]3? complex ions has been determined at different temperatures in the fused eutectic LiCl–KCl, the equimolar NaCl–KCl and the CsCl media. The apparent standard potential of the soluble–soluble redox system Yb(III)/Yb(II) has been obtained by cyclic voltammetry. The influence of the nature of the solvent on the electrochemical and thermodynamic properties of ytterbium compounds is discussed.

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   N 89

    Novoselova, A.
    The influence of solvent nature on thermodynamic properties of the reaction Tm (III)+ē ↔ Tm (II) in molten chlorides / A. Novoselova, V. Smolenski // Journal of Chemical Thermodynamics. - 2012. - Vol. 48. - С. 140-144. : граф. - Библиогр.: с. 144 (23 ref.) . - ISSN 0021-9614

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХЛОРИДЫ -- РЗМ -- ТЕРМОДИНАМИЧЕСКИЕ СВОЙСТВА -- ОКИСЛИТЕЛЬНО-ВОССТАНОВИТЕЛЬНЫЕ ПОТЕНЦИАЛЫ
Аннотация: This work presents the results of a study of the Tm3+/Tm2+ couple redox potentials vs. Cl–/Cl2 reference electrode at the temperature range (833 to 1073) K in molten equimolar NaCl–KCl and NaCl–2CsCl eutectic by direct potentiometric method. Initial concentrations of TmCl3 in solvents did not exceed 5.0 mol%. Apparent standard redox potentials of the couples were determined in different solvents. Basic thermodynamic properties of the reaction were calculated. The dependence between the apparent standard redox potentials of the couples and the ionic potential of the solvents was established.

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   I-60


    Influence of solid electrolyte particles size on ionic transport in model composite system (PVdF-HFP–Li1.3Al0.3Ti1.7(PO4)3) / O. L. Andreev, K. V. Druzhinin, P. Yu. Shevelin, N. N. Batalov // Ionics. - 2013. - Vol. 19, № 1. - С. 33-39. - Bibliogr. : p. 39 (16 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОЛИТ -- ЛИТИЙ-ИОННАЯ ПРОВОДИМОСТЬ -- КОМПОЗИТ
Аннотация: The influence of filler particles size on lithium ion conductivity of composite polymer electrolytes was issued on model system vinylidenefluoride with hexafluoropropylene (PVdF-HFP)–Li1.3Al0.3Ti1.7(PO4)3. Model electrolyte objects with filler grains of different sizes were prepared using a modified solvent casting method from a mixture of PVdF-HFP solution in dimethylformamide and Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte particles. The percolation threshold was defined and the transport properties of composite polymer electrolytes at different volume concentrations of the solid electrolyte investigated. A significant decrease in conductivity compared to that of ceramic solid electrolytes was observed. The size of the filler particles was found to affect the structure and transport properties of the prepared composite polymer electrolytes. The conductivity of the composite polymer electrolyte at 100 °C was found to increase by two orders of magnitude with the tenfold increase of the size of the filler particles.

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   N 89

    Novoselova, A.
    The influence of solvent nature on thermodynamic properties of the reaction TM(III) + E - TM(II) In molten chlorides / A. Novoselova, V. Smolenski // Journal of Chemical Thermodynamics,. - 2012. - Vol. 48. - С. 140-144.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПОТЕНЦИОМЕТРИЧЕСКИЙ МЕТОД -- РАСТВОРИТЕЛЬ -- ПОТЕНЦИАЛЫ ОКИСЛИТЕЛЬНО-ВОССТАНОВИТЕЛЬНЫЕ
Аннотация: This work presents the results of a study of the Tm3+/Tm2+ couple redox potentials vs. Cl–/Cl2 reference electrode at the temperature range (833 to 1073) K in molten equimolar NaCl–KCl and NaCl–2CsCl eutectic by direct potentiometric method. Initial concentrations of TmCl3 in solvents did not exceed 5.0 mol%. Apparent standard redox potentials of the couples were determined in different solvents. Basic thermodynamic properties of the reaction were calculated. The dependence between the apparent standard redox potentials of the couples and the ionic potential of the solvents was established.

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