Sfoglia per Autore "Demin, A. K."
Items 1-18 di 18
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CeO2 based materials doped with lanthanides for applications in intermediate temperature electrochemical devices
Pikalova, E. Y.; Murashkina, A. A.; Maragou, V. I.; Demin, A. K.; Strekalovsky, V. N.; Tsiakaras, P. E. (2011)The present work aims at the investigation of the influence of different dopants' ionic radius and concentration on the lattice parameters and the density of Ce(1-x)Ln(x)O(2-delta) (x = 0-0.20; Ln = La, Nd, Sm, Eu, Gd, Dy, ... -
Charge transfer in mixed proton, oxygen ion and electron solid oxide conductor
Demin, A. K.; Gorbova, E. V.; Glumov, M. V.; Tsiakaras, P. E. (2005)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 transfer properties of BaCe(0.88)Nd(0.12)O(3-delta) co-ionic electrolyte
Gorbova, E.; Zhuravlev, B. V.; Demin, A. K.; Song, S. Q.; Tsiakaras, P. E. (2006)Charge and mass transfer in an electrochemical cell, based on an electrolyte possessing both oxygen ion and proton conductivity (co-ionic electrolyte), under the gradient of steam partial pressure was considered from ... -
Conductivity of Gd-doped BaCeO3 protonic conductor in H-2-H2O-O-2 atmospheres
Medvedev, D. A.; Gorbova, E. V.; Demin, A. K.; Tsiakaras, P. (2014)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 ... -
The effect of co-dopant addition on the properties of Ln(0.2)Ce(0.8)O(2-delta) (Ln = Gd, Sm, La) solid-state electrolyte
Pikalova, E. Y.; Maragou, V. I.; Demina, A. N.; Demin, A. K.; Tsiakaras, P. E. (2008)The present work aims at the investigation of Ln(0.2)Ce(0.8)O(2-delta) (where Ln = Sm, La, Gd) structural and electrical properties when in the Ln sub-lattice, Ba2+ and Sr2+ with ionic radii 1.42 and 1.26 angstrom, ... -
Effect of dopants on CeO2 based solid state electrolytes for intermediate temperature electrochemical devices
Pikalova, E. Yu; Demin, A. K.; Bamburov, V. G.; Maragou, V. I.; Tsiakaras, P. E. (2011)The present work aims at the investigation of the influence of different dopants' ionic radii and their concentration on both the lattice parameters and the density of Ce1-xLnxO2-δ (x = 0-0.20; Ln = La, Nd, Sm, Eu, Gd, Dy, ... -
The effect of nano-sized Al2O3 and CO2O3 addition on the properties of fluorite-type ceria-based oxide composite electrolytes for SOFC applications
Pikalova, E. Yu; Proshina, A. V.; Maragou, V.; Demin, A. K.; Tsiakaras, P. (2011)The present work focuses on the influence of nano-sized Al2O3 and Co2O3 addition on the microstructure, mechanical and electrical properties of the solid state compositions Ce0.8Gd0.2O2-δ, Ce0.8Sm0.2O2-δ, Ce0.8Sm0.1Nd0.1O2-δ ... -
Electricity from ethanol fed SOFCs: the expectations for sustainable development and technological benefits
Douvartzides, S. L.; Coutelieris, F. A.; Demin, A. K.; Tsiakaras, P. E. (2004)Based on a thermodynamic and economic analysis presented in the first part of this paper, ethanol is considered as an alternative fuel with suitable characteristics for electricity generation in SOFCs. Ethanol fed steam ... -
Electrochemical properties of ceramic membranes based on SrTi0.5Fe0.5O3-delta in reduced atmosphere
Murashkina, A.; Maragou, V.; Medvedev, D.; Sergeeva, V.; Demin, A. K.; Tsiakaras, P. (2012)The present work aims at the investigation of the electrochemical properties of SrTi0.5Fe0.5O3-delta as a membrane material for hydrogen production via electrochemical reforming. The dependence of the electrical conductivity ... -
Forced convectional heat transfer in solid oxide fuel cells: An analytical treatment
Coutelieris, F. A.; Demin, A. K.; Douvartzides, S. L.; Tsiakaras, P. E. (2003)The heat transfer within a fuel cell at steady state conditions is considered here for one dimensional geometry. Analytical solution for the heat transfer equation accompanied by the appropriate boundary conditions is ... -
Fuel options for solid oxide fuel cells: a thermodynamic analysis
Douvartzides, S. L.; Coutelieris, F. A.; Demin, A. K.; Tsiakaras, P. E. (2003) -
Hydrogen production aided solid oxide electrochemical reformer fed with octane: A theoretical analysis
Murashkina, A. A.; Maragou, V. I.; Demin, A. K.; Pikalova, E. Y.; Tsiakaras, P. E. (2008)In the present work the possibility of pure hydrogen production by a solid oxide electrochemical reformer (SOER) is examined. Initial reagents are water steam, flowing into the cathode channel and octane flowing into the ... -
The influence of Fe, Cu, Al-doping on the crystal structure, thermal and electrical properties of calcium titanate
Murashkina, A. A.; Demina, A. N.; Demin, A. K.; Maragou, V. I.; Tsiakaras, P. E. (2008)CaTi(1-x)M(x)O(3-delta) (M=Fe, Al, Cu) samples were synthesized by the standard ceramic technology. The stability areas and the crystal structure of the solid solutions were determined by the X-ray Diffraction technique. ... -
The oxidation of ethanol over Pt catalyst-electrodes deposited on ZrO2 (8 mol% Y2O3)
Tsiakaras, P. E.; Douvartzides, S. L.; Demin, A. K.; Sobyanin, V. A. (2002)The reaction of ethanol oxidation has been examined over a Pt polycrystalline film deposited on an yttria-stabilized zirconia (YSZ) electrochemical reactor. Experiments were carried out between 300 and 350 degreesC at ... -
Performance of a SOFC fed by ethanol reforming products
Galvita, V. V.; Belyaev, V. D.; Frumin, A. V.; Demin, A. K.; Tsiakaras, P. E.; Sobyanin, V. A. (2002)Performance of a Pt based anode solid oxide fuel cell (SOFC) fed with a gas mixture containing H-2, CO and CH4 (molar ratio 1: 1: 1) produced by external ethanol decomposition was studied, Experiments were performed at ... -
Synthesis and electrophysical properties of (1-x)Ce0.8Gd0.2O2-delta+xTiO(2) (x=0-0.06) solid-state solutions
Pikalova, E. Y.; Maragou, V. I.; Demin, A. K.; Murashkina, A. A.; Tsiakaras, P. E. (2008)In the present work the electrical properties of (1-x)Ce0.8Gd0.2O2-delta+xTiO(2) (x=0-0.06) synthesized by the standard ceramic technology were investigated, in a wide range of oxygen partial pressures (0.21-10(-20)atm at ... -
Thermal expansion of materials in the barium cerate-zirconate system
Lyagaeva, Y. G.; Medvedev, D. A.; Demin, A. K.; Tsiakaras, P.; Reznitskikh, O. G. (2015)The thermal expansion of proton-conducting materials in the BaCe0.8 - x Zr (x) Y0.2O3 - delta system has been investigated in air. The influence of the zirconium concentration and the measurement mode (heating/cooling) on ... -
Thermodynamic analysis of a methane fed SOFC system based on a protonic conductor
Demin, A. K.; Tsiakaras, P. E.; Sobyanin, V. A.; Hramova, S. Y. (2002)Possibility, of utilization of CO-containing fuel in a fuel cell based on a solid oxide protonic conductor (SOFC(H+)) is demonstrated. Thermodynamic analysis of a methane fed SOFC(H-) system is performed. It is stated that ...