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Общее количество найденных документов : 33
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1.
Инвентарный номер: нет.
   
   N 36


    Nekrasov, V. N.
    An investigation of the anodic process at amorphous-carbon electrodes in molten NaCl-KCl-Li2O by voltammetry using linear potential sweep [Text] / V. N. Nekrasov, N. M. Barbin, L. E. Ivanovskii // Melts. - 1989. - V. 3, N 6. - P394-401. - Bibliogr.: 15 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- ПРОЦЕССЫ АНОДНЫЕ -- АНОДНЫЕ ПРОЦЕССЫ -- ЭЛЕКТРОДЫ СТЕКЛОУГЛЕРОДНЫЕ -- СТЕКЛОУГЛЕРОДНЫЕ ЭЛЕКТРОДЫ -- РАСПЛАВЫ ХЛОРИДНО-ОКСИДНЫЕ -- ХЛОРИДНО-ОКСИДНЫЕ РАСПЛАВЫ -- NaCl-KCl-Li2O -- NaCl -- KCl -- Li2O -- Na -- K -- Li -- ХЛОРИД НАТРИЯ -- НАТРИЙ -- ХЛОРИД КАЛИЯ -- МЕТОД ВОЛЬТАМПЕРОМЕТРИЧЕСКИЙ -- ВОЛЬТАМПЕРОМЕТРИЧЕСКИЙ МЕТОД -- ВОЛЬТАМПЕРОМЕТРИЯ
Аннотация: Using voltammetry and linear potential sweep (in the range 1-500 V/sec), we have studied the anodic process at amorphous carbon electrodes in an equimolar mixture of sodium and potassium chlorides containing dilithium oxide additions (0.226-0.602 mole %). In the two-stage model of the electrode process involving irreversible electrochemical adsorption and desorption reactions, a number of characteristic, individual stages of the kinetics parameters are considered

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2.
Инвентарный номер: нет.
   
   A 60


   
    Anodic behavior of the NiO-Fe2O3-Cr2O3-Cu composite during the low-temperature electrolysis of aluminum / V. A. Kovrov, A. P. Khramov, Yu. P. Zaikov, V. M. Chumarev, E. N. Selivanov // Russian Journal of Non-Ferrous Metals. - 2014. - Vol. 55, № 1. - P8-14
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОКСИД ХРОМА -- АНОД -- ЭЛЕКТРОЛИЗ -- РАСТВОРЕНИЕ
Аннотация: In order to fabricate oxide-metallic composites with the composition 25.3NiO-41.2Fe2O3-13.5Cr2O3-20.0Cu (wt %), the temperature and duration of sintering (1350°C, 30 min) that ensure the formation of the solid solution of chromium oxide in nickel ferrite have been determined. This material is tested as an anode for the electrolysis of the low-temperature solution with the composition 12.0NaF-36.8KF-51.2AlF3 (wt %), which was saturated with Al2O3 (t = 800°C). The amount of gaseous oxygen evolved on the anode was measured. It is shown that the main reaction on an anode at current density i = 0.015–1.0 A cm−2 is the oxidation of oxygen-containing anions from a melt with the formation of gaseous O2 and a substantial increase in the oxidation rate of the composite anode is observed at i > 1.0 A cm−2. The voltage across the electrolyzer (4.5 ± 0.5 V) and the anodic potential (2.43 ± 0.2 relative to the Al reference electrode) during a prolonged experiment (for 89 h, i = 0.4 A cm−2) indicate a stable and acceptable electrical conductivity of the material, while the dissolution rate, which was calculated by the weight loss (0.6 kg/yr) and volume loss (0.7 cm/yr), satisfy the requirements to inert anodes.

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3.
Инвентарный номер: нет.
   
   D 69


    Dokashenko, S. I.
    Capacitance of the double electric layer on liquid bismuth in molten alkali halides [Text] / S. I. Dokashenko, V. P. Stepanov, M. V. Smirnov // Melts. - 1988. - V. 2, N 5. - P385-390. - Bibliogr.: 12 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЕМКОСТЬ -- СЛОЙ ЭЛЕКТРИЧЕСКИЙ -- ВИСМУТ ЖИДКИЙ -- Bi -- МЕТАЛЛЫ ЩЕЛОЧНЫЕ -- ГАЛОГЕНИД ЩЕЛОЧНЫХ МЕТАЛЛОВ -- РАСПЛАВ ГАЛОГЕНИДНЫЙ
Аннотация: The capacitance of the double electric layer on liquid bismuth in molten alkali halides is measured as a function of temperature T and potential E. In general, the minimum-capacitance potential (MCP) does not coincide with the zero-charge potential (ZCP)

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4.
Инвентарный номер: нет.
   
   R 42


    Remez, I. D.
    Comparison between properties of double electric layers on solid and molten silver in contact with a ZrO2-Y2O3 crystal [Text] / I. D. Remez, Y. S. Lukach // Melts. - 1990. - V. 4, N 1. - P64-68. - Bibliogr.: 11 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- СЛОИ ДВОЙНЫЕ -- ДВОЙНЫЕ СЛОИ -- СЛОИ ЭЛЕКТРИЧЕСКИЕ -- ЭЛЕКТРИЧЕСКИЕ СЛОИ -- Zr -- ZrO2 -- ZrO2-Y2O3 -- Y -- Y2O3 -- ОКСИД ИТТРИЯ -- ОКСИД ЦИРКОНИЯ -- ИТТРИЙ -- ЦИРКОНИЙ -- МОНОКРИСТАЛЛЫ -- СЕРЕБРО РАСПЛАВЛЕННОЕ -- РАСПЛАВЛЕННОЕ СЕРЕБРО -- СЕРЕБРО ТВЕРДОЕ -- ТВЕРДОЕ СЕРЕБРО -- Ag -- ЭЛЕКТРОЛИТЫ ОКСИДНЫЕ -- ОКСИДНЫЕ ЭЛЕКТРОЛИТЫ -- ЭЛЕКТРОЛИТЫ ПОЛИКРИСТАЛЛИЧЕСКИЕ -- ПОЛИКРИСТАЛЛИЧЕСКИЕ ЭЛЕКТРОЛИТЫ
Аннотация: The behavior of the binary layer on molten and solid silver in contact with a ZrO2-0.1Y2O3 single crystal is investigated in the temperature range 850-1070 C. The dependences obtained in solid and molten silver are qualitatively similar. The results are compared with those for a polycrystalline oxide electrolyte. Relaxation is found to occur in the potential at the minimum in power with frequency

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5.
Инвентарный номер: нет.
   
   D 98


   
    Dynamic reference electrode for investigation of fluoride melts containing beryllium difluoride [Текст] / V. K. Afonichkin, A. L. Bovet, V. V. Ignatiev, A. V. Panov, V. G. Subbotin, A. I. Surenkov, A. D. Toropov, A. L. Zherebtsov // Journal of Fluorine Chemistry. - 2009. - Vol. 130, № 1. - С. 83-88. : граф. - Библиогр.: с. 88 (11 ref.) . - ISSN 0022-1139
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MOLTEN SALT FLUORIDES -- BERYLLIUM REFERENCE ELECTRODE -- REDOX POTENTIAL
Аннотация: Existing designs of reference electrodes for potentiometric measurements in fluoride melts do not meet basic requirements of the long exposure corrosion tests to be performed. A new diaphragm-free three-electrode meter with a nonstationary (dynamic) beryllium reference electrode for the redox potential measurements was developed. Optimum conditions of forming dynamic beryllium reference electrode were determined in the laboratory tests in isothermal cell. The device for redox potential measurement was designed and it was shown that it is highly sensitive to changes redox potential within ±5 mV. Reliability and efficiency of diaphragm-free device with dynamic reference electrode was confirmed in the thermal convection corrosion loop operating more than 1200 h with molten 15LiF–58NaF–27BeF2 mixture (mol%) at a maximum temperature of about 700 °C.????

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Journal of Fluorine Chemistry\\2009, V. 130, № 1, С. 83-88.pdf
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6.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemical and thermodynamic properties of ytterbium trichloride in molten caesium chloride [Текст] / V. Smolenski, A. Novoselova, A. Bovet, A. Osipenko, M. Kormilitsyn // Journal of Nuclear Materials . - 2009. - Vol. 385, № 1. - С. 184-185. - Библиогр.: с. 185 (5 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ИТТЕРБИЙ
Аннотация: This work presents the electrochemical study of YbCl3 in molten CsCl in the temperature range 973–1073 K. Transient electrochemical techniques have been used in order to investigate the reduction mechanism, transport parameters and thermodynamics properties of the reaction YbCl2+1/2Cl2=YbCl3. The results obtained show that the reduction reaction is reversible being controlled by the rate of the mass transfer. The diffusion coefficient of [YbCl6]3- complex ions was determined. The apparent standard electrode potential of the soluble–soluble redox system Yb3+/Yb2+ was obtained by cyclic voltammetry.

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Journal of Nuclear Materials\\2009, V. 385, № 1, С. 184-185.pdf
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7.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemical behaviour of curium(III) ions in fused 3LiCl–2KCl eutectic [] / A. Osipenko, A. Maershin, V. Smolenski, A. Novoselova, M. Kormilitsyn, A. Bychkov // Journal of Electroanalytical Chemistry. - 2011. - Vol. 651, № 1. - С. 67-71. - Bibliogr. : p. 71 (39 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТЕРМОДИНАМИКА -- КОЭФФИЦИЕНТ ДИФФУЗИИ
Аннотация: This work presents the electrochemical study of Cm(III) in fused 3LiCl–2KCl eutectic in the temperature range 723–923 K. Transient electrochemical techniques such as cyclic, square wave voltammetries, and chronopotentiometry have been used in order to investigate the reduction mechanism of curium ions up to metal. The results obtained show that the reduction reaction takes place in a single step . The diffusion coefficient of Cm3+ ions was determined by cyclic voltammetry at different temperatures by applying Berzins–Delahay equation. The validity of the Arrhenius law was also verified and the activation energy for diffusion was found to be 28.21 kJ mol-1. The apparent standard electrode potential of the redox couple Cm(III)/Cm(0) was found by chronopotentiometry at several temperatures. The thermodynamic properties of curium trichloride have also been calculated.??

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Journal of Electroanalytical Chemistry\\JEC2011 V.651, N . 1- P.67-71.pdf,
http://www.sciencedirect.com/science/article/pii/S1572665710004455
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8.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemistry of oxygen-free curium compounds in fused NaCl–2CsCl eutectic [Текст] / A. Osipenko, A. Maershin, V. Smolenski, A. Novoselova, M. Kormilitsyn, A. Bychkov // Journal of Nuclear Materials . - 2010. - Vol. 396, № 1. - С. 102-106. - Библиогр.: с. 106 (37 ref.) . - ISSN 0022-3115
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MOLTEN CHLORIDES -- ХРОНОПОТЕНЦИОМЕТРИЯ -- ВОССТАНОВЛЕНИЕ -- КОЭФФИЦИЕНТ ДИФФУЗИИ -- ТЕРМОДИНАМИЧЕСКИЕ СВОЙСТВА
Аннотация: This work presents the electrochemical study of Cm(III) in fused NaCl–2CsCl eutectic in the temperature range 823–1023 K. Transient electrochemical techniques such as cyclic, differential pulse and square wave voltammetry, and chronopotentiometry have been used in order to investigate the reduction mechanism of curium ions up to the metal. The results obtained show that the reduction reaction takes place in a single step . The diffusion coefficient of [CmCl6]3- complex ions was determined by cyclic voltammetry at different temperatures by applying the Berzins–Delahay equation. The validity of the Arrhenius law was also verified and the activation energy for diffusion was found to be 44.46 kJ/mol. The apparent standard electrode potential of the redox couple Cm(III)/Cm(0) was found by chronopotentiometry at several temperatures. The thermodynamic properties of curium trichloride have also been calculated.????

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Journal of Nuclear Materials\\JNM2010, V 396, N 1. - P. 102-106.pdf
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9.
Инвентарный номер: нет.
   
   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
ББК 54
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

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10.
Инвентарный номер: нет.
   
   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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