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1.
Инвентарный номер: нет.
   
   S 71


    Somov, S. I.
    A parallel analysis of oxygen and combustibles in solid electrolyte amperometric cells [Text] / S. I. Somov, U. Guth // Sensor and Actuators B: Chemical. - 1998. - V. 47, N 1-3. - P131-138. - Библиогр.: с. 138 (5 назв.). - Биогр. справ.: p. 138 . - ISSN 0925-4005
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- ДАТЧИКИ ГАЗА -- ЭЛЕКТРОЛИТЫ ТВЕРДЫЕ -- ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ -- КИСЛОРОД -- Zr -- ЦИРКОНИЙ -- ДИОКСИД ЦИРКОНИЯ -- ZrO2 -- CO -- ОКСИД УГЛЕРОДА -- CH4 -- МЕТАН
Аннотация: A parallel analysis of oxygen and combustible components is a common problem for control of exhausts of automobiles, boilers, power plants, and so on. Multielectrode solid electrolyte amperometric sensors are considered as an effective instrument for such measurements in hazardous working conditions. This paper presents basic principles and experimental results on the analysis of combustibles in the presence of oxygen by means of zirconia electrolyte amperometric cells. Experimental studies are concerned with electrochemicaloxidation of carbon monoxide, methane and propene in the presence of oxygen in different working conditions at different types of electrodes. Results show diverse opportunities for selective performance of different electroanalytical reactions at certain electrodes

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2.
Инвентарный номер: нет.
   
   S 71


    Somov, S. I.
    Application of gas-diffusive solid electrolyte cell for analysis of gas with high oxygen content [Text] = Application of gas-diffusive solid electrolyte cell for analysis of gas with high oxygen content / S. I. Somov // Solid State Ionics. - 1989. - V. 36, N 3-4. - P263-265. - Bibliogr.: 3 ref. . - ISSN 0167-2738
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- ЭЛЕКТРОЛИТЫ ТВЕРДЫЕ -- ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ -- ЯЧЕЙКИ ТВЕРДОЭЛЕКТРОЛИТНЫЕ -- ТВЕРДОЭЛЕКТРОЛИТНЫЕ ЯЧЕЙКИ -- ГАЗЫ КИСЛОРОДСОДЕРЖАЩИЕ -- КИСЛОРОДСОДЕРЖАЩИЕ ГАЗЫ -- КИСЛОРОД ГАЗООБРАЗНЫЙ -- ГАЗООБРАЗНЫЙ КИСЛОРОД -- O2

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3.
Инвентарный номер: нет.
   
   A 67


   
    Application of Solid oxide proton-conducting electrolytes for amperometric analysis of hydrogen in H2+N2+H2O gas mixtures / A. Kalyakin, G. Fadeyev, A. Demin, E. Gorbova, A. Brouzgou, A. Volkov, P. Tsiakaras // Electrochimica Acta. - 2014. - Vol. 141. - P .120-125. - Bibliogr. : p. 125 (41 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ -- ВОДОРОД -- ДАТЧИКИ
Аннотация: Amperometric hydrogen sensors based on proton-conducting solid electrolytes of La0.95Sr0.05YO3, CaTi0.95Sc0.05O3 and CaZr0,9Sc0.1O3 compositions are prepared and investigated in the present work. The influence of the sensor design on its own characteristics is also examined. It is shown that a solid electrolyte used in the form of discs with cavities significantly simplifies the design of this type of sensors. A sensor based on La0.95Sr0.05YO3 electrolyte with fully sealed junction between discs is suitable for the analysis of mixtures with high H2 content. It is found that by increasing H2 content from 10 to 98% the limiting current increases from 0.25 to 2.25 mA (at 750 mV). It is also found that the sensor based on La0.95Sr0.05YO3 with discs sealed in two points as well as the sensor based on CaZr0,9Sc0.1O3 with fully sealed junction are suitable for the analysis of mixtures with low H2 content (0.5-2%). For the above cases, the limiting current at 2% H2 reaches 3.5 and 0.5 mA (at 750 mV), respectively. CaTi0.95Sc0.05O3 is not suitable to be used as a hydrogen sensor. In all the examined systems, steam content does not affect sensors’ behavior and high operating temperatures (850 °C) increase the range of sensors’ hydrogen measuring concentration capacity.

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4.
Инвентарный номер: нет.
   
   C 47


   
    Characterization of Ni-cermet degradation phenomena I. Long term resistivity monitoring, image processing and X-ray fluorescence analysis / M. V. Ananyev , D. I. Bronin, D. A. Osinkin, V. A. Eremin, R. Steinberger-Wilckens, L. G. J. De Haart, J. Mertens . - [S. l. : s. n.]. - Б. ц.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПОРИСТОСТЬ -- УДЕЛЬНОЕ СОПРОТИВЛЕНИЕ -- ОКСИД ИТТРИЯ -- ОКСИД ЦИРКОНИЯ
Аннотация: The present paper is devoted to Ni-cermet degradation phenomena and places emphasis on experimental approaches and data handling. The resistivity of Ni-YSZ cermet (nickel and 8 mol.% yttria stabilized zirconia) anode substrates was monitored during 3000 h at 700 and 800 °C in a gas mixture of 80 vol.% water vapor and 20 vol.% hydrogen. The experimentally evaluated dependence of resistivity of the Ni-YSZ substrates can be well described by exponential decay functions. Post test analysis by image processing and XRF (X-ray fluorescence) analysis for characterization of the microstructure and elemental composition were carried out for virgin samples and after 300, 1000 and 3000 h of exposure time. The 3D-microstructure was reconstructed using an original spheres packing algorithm. Two processes leading to the Ni-YSZ degradation were observed: Ni-phase particle coarsening and volatilization. The effect of these processes on resistivity and such microstructure parameters as porosity, Ni-phase fraction, Ni and YSZ phases particle size distributions, triple phase boundary length, and tortuosity factor are considered in this paper.

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5.
Инвентарный номер: нет.
   
   C 47


   
    Charge transfer in mixed proton, oxygen ion and electron solid oxide conductor [Текст] / A. K. Demin, E. V. Gorbova, M. V. Glumov, P. E. Tsiakaras // Ionics. - 2005. - Vol. 11, № 3-4. - С. 289-293. - Библиогр. : с. 293 (3 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MASS TRANSFER -- PROTON-OXYGEN
Аннотация: Analysis of the equivalent scheme of the mixed proton-oxygen ion-electron conductor (MPOEC) allowed to obtain relationships between parameters of the membrane (total conductivity and transfer numbers) and parameters of the charge and mass transfer through the membrane (partial ion and electron currents, the specific flux of hydrogen at the cathode membrane surface) under regime of electrochemical reforming. It was stated that presence of proton conductivity in addition to oxygen ion conductivity led to increase of total flux of produced hydrogen. However, under conditions typical for the electrochemical reforming of methane into hydrogen, the specific hydrogen flux is about four times lower in the case when the membrane has proton-electron conductivity than in the case when the membrane has oxygen ion-electron conductivity.

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Ionics\\2005, V. 11, № 3-4, С. 289-293.pdf
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6.
Инвентарный номер: нет.
   
   C 74


   
    Conductivity of Gd-doped BaCeO3 protonic conductor in Н2–Н2О–О2 atmospheres / D. A. Medvedev, E. V. Gorbova, A. K. Demin, P. Tsiakaras // International Journal of Hydrogen Energy. - 2014. - Vol. 39, № 36. - P21547-21552. - Bibliogr. : p. 21551-21552 (31 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПРОВОДИМОСТЬ ИОННАЯ -- ПРОВОДИМОСТЬ ПРОТОННАЯ -- МАТЕРИАЛЫ КЕРАМИЧЕСКИЕ -- ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ
Аннотация: In the present investigation, a radically new and simple method of evaluation of the proton conductivity is proposed. This method is based on the conductivity measurement of ceramic materials depending on the oxygen partial pressure (pO2) at a gradual transition from the atmosphere of pure oxygen to one of wet hydrogen: O2 → O2 (H2O) → H2O (O2) → H2O → H2O (H2) → H2 (H2O). Experimental data of total conductivities for the solid electrolyte BaCe0.9Gd0.1O3–δ (BCG) have been fitted with modeling ones in accordance with the defect chemistry model at 600, 750 and 900 °C. Experimental and theoretical relationships correlate well with each other, demonstrating the success of the proposed model description. Analysis of dependences of the total conductivity as a function of pO2 with simultaneous change of pO2 and water partial pressure (pH2O) allows the estimation of the contribution of the partial conductivities (protonic, oxygen ionic, electronic) in the total one and the identification of the areas of purely ionic and purely protonic conductivity. Using the obtained data, some transport phenomena of proton-conducting materials, which were not previously interpreted, are discussed.

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7.
Инвентарный номер: нет.
   
   Z 19


    Zakiryanova, I. D.
    Correlation between hydroxide ion dynamics and transport properties of hydroxide/chloride melts according to raman spectroscopy data / I. D. Zakiryanova // Journal of Applied Spectroscopy . - 2014. - Vol. 81, № 2. - P. 301-304.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КОМБИНАЦИОННОЕ РАССЕЯНИЕ -- ИНЕРЦИЯ -- ЭЛЕКТРОЛИТ
Аннотация: Using data obtained in analysis of the band contour for the totally symmetric stretching vibration of the OH – anion in Raman spectra of hydroxide/chloride ionic melts, a correlation has been established between the orientational relaxation time and effective moment of inertia of the hydroxide ion and the transport properties of the electrolyte.

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8.
Инвентарный номер: нет.
   
   C 94


   
    Cu and Gd co-doped BaCeO3 proton conductors: Experimental vs SEM image algorithmic-segmentation results / M. Ananyev, D. Medvedev, A. Gavrilyuk, S. Mitri, A. Demin, V. Malkov, P. Tsiakaras // Electrochimica Acta. - 2014. - Vol. 125. - P371-379.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОПРОВОДНОСТЬ -- ЦЕРАТ БАРИЯ -- ТВЕРДЫЕ РАСТВОРЫ -- ОКСИД МЕДИ -- ПРОВОДИМОСТЬ
Аннотация: Segmentation algorithms for the quantitative description of the surface microstructure and the evaluation of the grain-boundary conductivity of ceramic materials surface using SEM microphotographs analysis was developed and applied in the present work for first time in barium cerate based solid solutions. To this purpose novel polycrystalline ceramic materials based on Cu and Gd co-doped BaCeO3 proton conductors exhibiting high proton conductivity have been prepared and characterized. The influence of copper oxide as a dopant on the microstructure and the electrical properties of BaCe0.9–xGd0.1CuxO3–δ (0≤x≤0.1) have been examined in detail. It is shown that the dependence of the electrical conductivity is correlated with the average oxide grain diameter variation in air at various temperatures. Moreover, it was found that the algorithmic segmentation evaluation results are in good agreement with the experimental ones, verifying the considerable contribution of the grain-boundary conductivity to the electrical transport of Cu and Gd co-doped BaCeO3 proton conductors.

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9.
Инвентарный номер: нет.
   
   C 94


   
    Cu(+) and Cu(2+) diffusion coefficients in low-melting alkali halide mixtures / M. Ananyev, D. Medvedev, A. Gavrilyuk, S. Mitri, A. Demin, V. Malkov, P. Tsiakaras // Electrochimica Acta . - 2014. - Vol. 125. - P .371-378.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОКСИД МЕДИ -- ПРОВОДИМОСТЬ -- ЦЕРАТ БАРИЯ -- ПРОТОННАЯ ПРОВОДИМОСТЬ
Аннотация: Segmentation algorithms for the quantitative description of the surface microstructure and the evaluation of the grain-boundary conductivity of ceramic materials surface using SEM microphotographs analysis was developed and applied in the present work for first time in barium cerate based solid solutions. To this purpose novel polycrystalline ceramic materials based on Cu and Gd co-doped BaCeO3 proton conductors exhibiting high proton conductivity have been prepared and characterized. The influence of copper oxide as a dopant on the microstructure and the electrical properties of BaCe0.9–xGd0.1CuxO3–δ (0≤x≤0.1) have been examined in detail. It is shown that the dependence of the electrical conductivity is correlated with the average oxide grain diameter variation in air at various temperatures. Moreover, it was found that the algorithmic segmentation evaluation results are in good agreement with the experimental ones, verifying the considerable contribution of the grain-boundary conductivity to the electrical transport of Cu and Gd co-doped BaCeO3 proton conductors.

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10.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemical-corrosion behavior of Fe-Al alloys in molten alkali-metal carbonates [Text] / V. I. Elkina, V. Y. Kudyakov, O. P. Penyagina, A. A. Pankratov, B. D. Antonov, V. G. Zyryanov // Melts. - 1991. - V. 5, N 5. - P372-376. - Bibliogr.: 9 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПОВЕДЕНИЕ КОРРОЗИОННО-ЭЛЕКТРОХИМИЧЕСКОЕ -- СПЛАВ Fe-Al -- Fe -- Al -- Fe-Al -- КАРБОНАТ РАСПЛАВЛЕННЫЙ -- КАРБОНАТ ЩЕЛОЧНЫХ МЕТАЛЛОВ -- МЕТАЛЛЫ ЩЕЛОЧНЫЕ -- АЛЮМИНИЙ -- ЖЕЛЕЗО -- ПОВЕРХНОСТЬ СПЛАВА -- КОРРОЗИЯ
Аннотация: Методом анодных поляризационных кривых исследовано коррозионно-электрохимическое поведение Fe-Al сплавов, содержащих 4,5; 8,5; 15,5 и 21,5 мас. % Al, в расплавленной эвтектической смеси Li, Na, K/CO3 при 600 и 800 С. Методами РФА и РСМА изучены образующиеся на поверхности сплавов продукты коррозии
The method of anodic polarization curves is used to investigate the electrochemical-corrosion behavior of Fe-Al alloys containing 4.5, 8.5, 15.5, and 21.5 wt. % Al in a molten eutectic mixture of Li, Na, K/CO3 at 600 and 800 C. The corrosion products formed on the surface of the alloys are studied by x-ray phase analysis (XPA) and electronmicroprobe analysis (EMA) techniques

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