Πλοήγηση ανά Συγγραφέα "Maragou, V."
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Direct ethanol solid oxide fuel cells: The case of PT anodes
Poulianitis, C.; Maragou, V.; Dio, E.; Song, S.; Tsiakaras, P. (2005)The limitation of fossil fuels deposits and the detrimental effects of their combustion emissions on the environment make it necessary to develop alternative technologies, such as fuel cells and use the renewable and ... -
The effect of cobalt oxide addition on the properties of gadolinium doped barium cerate
Maragou, V.; Medvedev, D.; Gorbova, E.; Demin, A.; Tsiakaras, P. (2009)In the present work the effect of cobalt oxide addition on the density and on the electrical properties of gadolinium doped barium cerate is investigated. A series of BaCe0.9-xGd0.1CoxO3-δ (?=0.00, 0.01, 0.03, 0.05, 0.07, ... -
The effect of microwave operation parameters on the electrochemical performance of Pt/C catalysts
Song, S.; Liu, J.; Shi, J.; Liu, H.; Maragou, V.; Wang, Y.; Tsiakaras, P. (2011)In the present work, the effect of the microwave operation parameters on the heating behaviour of ethylene glycol (EG) solution and thereafter on the physicochemical and electrochemical properties of Pt/C catalysts have ... -
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 ... -
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 ... -
High surface area tungsten carbide microspheres as effective Pt catalyst support for oxygen reduction reaction
Wang, Y.; Song, S.; Maragou, V.; Shen, P. K.; Tsiakaras, P. (2009)In the present work, the preparation of high surface area (256 m2 g-1) tungsten carbide microspheres (TCMSs) by the aid of a simple hydrothermal method is realized and the performance of the Pt electrocatalyst supported ... -
How far are direct alcohol fuel cells from our energy future?
Song, S.; Maragou, V.; Tsiakaras, P. (2007)Direct alcohol fuel cells (DAFCs) have been attracting more and more attention and interest during the last decade due to their simplicity, the easy handle and the high power density of the liquid alcohol fuels. However, ... -
Influence of Cu on the properties of gadolinium-doped barium cerate
Gorbova, E.; Maragou, V.; Medvedev, D.; Demin, A.; Tsiakaras, P. (2008)In the present work the effect of copper oxide addition on the densification behavior and electrical conductivity of BaCe1-xGdxO3-delta (BCG) type ceramics is investigated. Small addition (1 mol%) of this sintering additive ... -
Influence of sintering additives of transition metals on the properties of gadolinium-doped barium cerate
Gorbova, E.; Maragou, V.; Medvedev, D.; Demin, A.; Tsiakaras, P. (2008)In the present work the effect of MOx (where M =Cu, Ni, Zn, Fe, Co, Ti) addition on the densification behavior and electrical conductivity of BaCe(0.9)d(0.1)O(3-delta) ceramics is investigated. It was found that the small ... -
Investigation of a Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O3-delta based cathode IT-SOFC - I. The effect of CO2 on the cell performance
Yan, A.; Cheng, M.; Dong, Y. L.; Yang, W. S.; Maragou, V.; Song, S. Q.; Tsiakaras, P. (2006)A Ba0.5Sr0.5Co0.08Fe0.2O3-delta (BSCF) based cathode intermediate temperature solid oxide fuel cell (IT-SOFC) was fabricated and tested. The effect of carbon dioxide on the performance of BSCF cathode was evaluated at ... -
Investigation of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta based cathode SOFCII. The effect of CO2 on the chemical stability
Yan, A. Y.; Maragou, V.; Arico, A.; Cheng, M.; Tsiakaras, P. (2007)The effect of carbon dioxide on the chemical stability of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathode in the real reaction environment at 450 degrees C was investigated by X-ray photoelectron spectroscopy (XPS), scanning electron ... -
Investigation of a Ba0.5Sr0.5Co0.8Fe0.2O3-δ based cathode SOFC. II. The effect of CO2 on the chemical stability
Yan, A.; Maragou, V.; Arico, A.; Cheng, M.; Tsiakaras, P. (2007)The effect of carbon dioxide on the chemical stability of a Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode in the real reaction environment at 450 °C was investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy ... -
Investigation of the protonic conduction in Sm doped BaCeO3
Gorbova, E.; Maragou, V.; Medvedev, D.; Demin, A.; Tsiakaras, P. (2008)In the present work the structural and electrical properties of samarium-doped barium cerate perovskites of BaCe1-xSmxO3-delta formula (with x=0-0.2), prepared by following the solid state reaction method, are investigated. ... -
Investigation of the reaction of ethanol-steam mixtures in a YSZ electrochemical reactor operated in a fuel cell mode
Poulianitis, C.; Maragou, V.; Yan, A.; Song, S.; Tsiakaras, P. (2006)In the present investigation ethanol-water mixtures were directly fed to a yttria stabilized zirconia (YSZ) electrochemical reactor operated in a fuel cell mode and the preliminary results are presented and discussed. ... -
Investigation of the structural and electrical properties of Co-doped BaCe0.9Gd0.1O3-delta
Medvedev, D.; Maragou, V.; Zhuravleva, T.; Demin, A.; Gorbova, E.; Tsiakaras, P. (2011)In the present work the effect of cobalt oxide addition on the density and on the electrical properties of gadolinium-doped barium cerate is investigated. A series of BaCe0.9-xGd0.1CoxO3-delta (x = 0.00, 0.01, 0.03, 0.05, ... -
KOH-activated multi-walled carbon nanotubes as platinum supports for oxygen reduction reaction
He, C.; Song, S.; Liu, J.; Maragou, V.; Tsiakaras, P. (2010)In the present investigation, multi-walled carbon nanotubes (MWCNTs) thermally treated by KOH were adopted as the platinum supporting material for the oxygen reduction reaction electrocatalysts. FTIR and Raman spectra were ... -
Novel composite solid state electrolytes on the base of BaCeO3 and CeO2 for intermediate temperature electrochemical devices
Medvedev, D.; Maragou, V.; Pikalova, E.; Demin, A.; Tsiakaras, P. (2013)In the present work, nano-sized powders of (1-x)Ce0.8Sm0.2O2-delta-xBaCe(0.8)Sm(0.2)O(3-delta) (x = 0, 0.3, 0.5, 0.7 and 1) were obtained by solution combustion synthesis (self-combustion synthesis, SCS) method of nitrate ... -
Single phase materials based on Co-doped SrTiO3 for mixed ionic-electronic conductors applications
Murashkina, A.; Maragou, V.; Medvedev, D.; Sergeeva, V.; Demin, A.; Tsiakaras, P. (2012)In the present work the effect of cobalt oxide addition on the structural and electrical properties of strontium titanate is examined. The SrTi1-xCoxO3-delta (0 <= x <= 0.4) samples were synthesized according to solid state ... -
Solid oxide fuel cell stack: Temperature regulation
Demin, A.; Gorshkov, M.; Chuikin, A.; Maragou, V.; Tsiakaras, P. (2011)A fuel cell produces electricity and heat [1,2]. Low thermal conductivity of materials composed a solid oxide fuel cell (SOFC) and absence of effective heat carriers can lead to significant temperature irregularity within ... -
Structural, electrical and transport properties of iron doped calcium titanates in view of applications for hydrogen production through the electrochemical conversion of water
Maragou, V.; Murashkina, A.; Yu Pikalova, E.; Demin, A.; Tsiakaras, P. (2009)The present work aims at the investigation of the structural, electrical and transport properties of a series of iron doped calcium titanates (CaTi1-xFexO3-δ) as membrane material for hydrogen production through the ...