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  1. No Access

    Article

    Synthesis and properties of fuel cell anodes based on (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03)

    Results are presented of studying electrochemical properties of perovskite-like solid solutions (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03...

    A. I. Ivanov, D. A. Agarkov, I. N. Burmistrov… in Russian Journal of Electrochemistry (2014)

  2. No Access

    Article

    Analysis of electric properties of ZrO2-Y2O3 single crystals using teraherz IR and impedance spectroscopy techniques

    The data obtained by impedance spectroscopy (1 Hz to 32 MHz) and broad-band dielectric spectroscopy (30 GHz-150 THz) are presented for crystals based on zirconia doped by 1.5–30 mol % Y2O3 or 10 mol % Sc2O3 and 1...

    V. G. Artemov, I. E. Kuritsyna, S. P. Lebedev… in Russian Journal of Electrochemistry (2014)

  3. No Access

    Article

    Electrical, electrochemical, and thermomechanical properties of perovskite-type (La1−x Sr x )1−y Mn0.5Ti0.5O3−δ (x = 0.15–0.75, y = 0–0.05)

    Strontium additions in (La1−x Sr x )1−y Mn0.5Ti0.5O3−δ (x = 0.15–0.75, y = 0–0.05) having a rhombohedrally distorted perovskite s...

    V. A. Kolotygin, E. V. Tsipis, A. I. Ivanov… in Journal of Solid State Electrochemistry (2012)

  4. No Access

    Article

    Heterogeneous ceramics formed by grain boundary engineering

    Two examples were selected to emphasize the potential of grain boundary engineering in the performance design of heterogeneous ceramics. Gadolinium-doped ceria-based powders were co-fired with additions of sil...

    D. Ivanova, E. M. C. L. G. P. Lima, A. Kovalevsky, F. M. L. Figueiredo… in Ionics (2008)

  5. No Access

    Article

    Behavior of (La,Sr)CoO3- and La2NiO4-based ceramic anodes in alkaline media: compositional and microstructural factors

    The behavior of dense ceramic anodes made of perovskite-type $$ {\text{La}}_{{1 - x - y}} {\text{Sr}}_{x} {\text{Co}}_{{1 - z}} {\text...

    S. K. Poznyak, V. V. Kharton, J. R. Frade… in Journal of Solid State Electrochemistry (2008)

  6. No Access

    Article

    Oxygen ion transport numbers: assessment of combined measurement methods

    Several modifications of the faradaic efficiency and electromagnetic field (EMF) methods, taking electrode polarisation resistance into account, were considered based on the analysis of ion transport numbers a...

    V. V. Kharton, A. L. Shaula, F. M. B. Marques in Ionics (2007)

  7. No Access

    Article

    Oxygen permeability, stability and electrochemical behavior of \( \Pr _{2} {\text{NiO}}_{{4 + \delta }} \) -based materials

    The high-temperature electronic and ionic transport properties, thermal expansion and stability of dense $$ \Pr _{2} {\text{NiO}}_{{4 ...

    A. V. Kovalevsky, V. V. Kharton, A. A. Yaremchenko… in Journal of Electroceramics (2007)

  8. No Access

    Article

    Methane oxidation over nanocrystalline Ce0.45Zr0.45La0.10O2-δ/Pt and Ce0.9Sm0.1O2-δ/Pt anodes

    The electrocatalytic activity of composite anodes, comprising metallic platinum and nanocrystalline Pt-modified Ce0.45Zr0.45La0.10O2-δ and Ce0.9Sm0.1O2-δ , was evaluated for the oxidation of dry methane in a soli...

    A. A. Yaremchenko, V. V. Kharton, A. A. Valente, E. V. Frolova… in Catalysis Letters (2006)

  9. Article

    Open Access

    Silica-scavenging effect in zirconia electrolytes: assessment of lanthanum silicate formation

    Yttria-stabilized zirconia (YSZ)-based composite electrolytes were produced by mixture and firing of the base electrolyte, namely with silica, and silica and lanthanum oxide, to study the impact of presence an...

    A. V. Kovalevsky, F. M. B. Marques, V. V. Kharton, F. Maxim, J. R. Frade in Ionics (2006)

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  10. No Access

    Article

    Oxygen transport and thermomechanical properties of SrFe(Al)O3-δ –SrAl2O4 composites: microstructural effects

    Measurements of oxygen permeation through dense % MathType!Translator!2!1!AMS LaTeX.tdl!TeX -- AMS-LaTeX! % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX % garmW...

    V. V. Kharton, A. V. Kovalevsky… in Journal of Solid State Electrochemistry (2006)

  11. No Access

    Article

    Applicability of emf measurements under external load resistance conditions for ion transport number determination

    In order to evaluate the applicability of concentration cells for the ion transference number measurements with external load, the cell response was simulated with variable transport properties of the cell mat...

    J. R. Frade, V. V. Kharton, A. A. Yaremchenko… in Journal of Solid State Electrochemistry (2006)

  12. No Access

    Article

    Oxygen permeability of mixed-conducting composite membranes: effects of phase interaction

    Composite ceramic membranes, based on selected combinations of ionic conductors ((La0.9Sr0.1)0.98Ga0.8Mg0.2O3-δ—LSGM or Ce0.8Gd0.2O2-δ—CGO) and electronic/mixed conductors (La2Ni0.8Cu0.2O4+δ—LNC, La0.8Sr0.2Fe0.8C...

    A. L. Shaula, V. V. Kharton, F. M. B. Marques… in Journal of Solid State Electrochemistry (2006)

  13. No Access

    Article

    Development of oxygen ion conductors: One relevant tendency

    In the past ten years a series of developments in the field of materials with dominant oxygen ion conduction introduced a variety of new systems. The most relevant aspect is a shift from ionic transport mechan...

    F. M. B. Marques, V. V. Kharton in Ionics (2005)

  14. No Access

    Article

    Mössbauer Spectra and Catalytic Behaviorof Perovskite-like SrFe0.7Al0.3O3-δ

    Mixed-conducting SrFe0.7Al0.3O3-δ (SFA) exhibits substantial catalytic activity towards partial oxidation of methane and can thus be considered as a component of monolithic ceramic reactors for synthesis gas gene...

    V. V. Kharton, J. C. Waerenborgh, D. P. Rojas, A. A. Yaremchenko… in Catalysis Letters (2005)

  15. No Access

    Chapter and Conference Paper

    Glass-Ceramic Sealants for SOFC-Based Systems

    The studies of electrochemical, physicochemical and mechanical properties of glass-ceramic sealants, based on SiO2-Al2O3-CaO-BaO and SiO2-MgO-BaO systems, showed sufficient stability in contact with zirconia, lan...

    V.V. Kharton, E.V. Tsipis, A.P. Carvalho… in Fuel Cell Technologies: State and Perspect… (2005)

  16. No Access

    Chapter and Conference Paper

    Cellulose-Precursor Synthesis of Electrocatalytically Active Components of SOFCs and Mixed-Conducting Membrane Reactors

    Developments of intermediate-temperature solid oxide fuel cells and electrocatalytic reactors require novel electrode and catalyst materials with high performance at 800–1100 K, low-cost processing technologie...

    E.V. Tsipis, I.A. Bashmakov, V.V. Kharton… in Fuel Cell Technologies: State and Perspect… (2005)

  17. No Access

    Article

    Transport and electrocatalytic properties of La0.3Sr0.7Co0.8Ga0.2O3−δ membranes

    Incorporation of gallium into the perovskite lattice of La0.3Sr0.7CoO3−δ leads to increasing unit cell volume and to decreasing thermal expansion, total conductivity and oxygen permeability. At 973–1223 K, the ox...

    V. V. Kharton, E. V. Tsipis, I. P. Marozau… in Journal of Solid State Electrochemistry (2005)

  18. No Access

    Article

    Defect formation and transport in SrFe1-xAlxO3-δ

    Perovskite-related phases derived from SrFeO3-δ are among known mixed conductors with highest oxygen permeability and are thus of interest as the ceramic membrane materials for oxygen separation and partial oxida...

    A. L. Shaula, V. V. Kharton, M. V. Patrakeev, J. C. Waerenborgh, D. P. Rojas… in Ionics (2004)

  19. No Access

    Article

    Cellulose-precursor synthesis of nanocrystalline Ce0.8Gd0.2O2−δ for SOFC anodes

    Developments of intermediate-temperature solid oxide fuel cells (IT SOFCs) require novel anode materials with a high electrochemical activity at 800–1070 K. The polarization of cermet anodes, made of nickel, c...

    E. V. Tsipis, V. V. Kharton, I. A. Bashmakov… in Journal of Solid State Electrochemistry (2004)

  20. No Access

    Article

    Properties of CaTi1 − xFe x O3 − δ Ceramic Membranes

    CaCO3, TiO2 and Fe2O3 were mixed in the appropriate stoichiometric quantities and calcined at 1100∘C for 10 h. These powder mixtures were uniaxially pressed and sintered at temperatures ranging from 1350 to 1500_...

    F. M. Figueiredo, M. R. Soares, V. V. Kharton… in Journal of Electroceramics (2004)

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