Πλοήγηση ανά Θέμα "Physics, Condensed Matter"
Αποτελέσματα 1-20 από 44
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Adjustable Hyperthermia Response of Self-Assembled Ferromagnetic Fe-MgO Core-Shell Nanoparticles by Tuning Dipole-Dipole Interactions
(2012)The Fe-MgO core-shell morphology is proposed within the single-domain nanoparticle regime as an enhanced magnetically driven hyperthermia carrier. The combinatory use of metallic iron as a core material together with the ... -
Bi4Cu0.2V1.8O11-delta based membrane electrochemical reactors for propane oxidation at moderate temperatures
(2005)Bi4Cu0.2V1.8O11-delta membrane material was synthesized by following the solid-state method. The oxygen permeation flux at 673 K was found to be 0.5 ml/cm(2) by the use of an external electric power source. The oxidation ... -
Catalytic and Electrocatalytic Activation of Methane over Manganese Oxides Deposited on YSZ
(1997)The catalytic and the electrocatalytic behavior of MnO(x) oxides deposited on Yttria Stabilized Zirconia (YSZ) in the form of thin porous films, was studied during the reaction of methane activation at high methane to ... -
Catalytic and electrocatalytic oxidation of ethanol over a La0.6Sr0.4Co0.8Fe0.2O3 perovskite-type catalyst
(2000)The catalytic and electrocatalytic behavior of the perovskite-type La0.6Sr0.4Co0.8Fe0.2O3 catalyst was investigated during ethanol oxidation. Experiments were carried out at atmospheric pressure in a fully yttria-stabilized ... -
Catalytic Behavior of La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3) Perovskite-Type Oxide Thin Films Deposited on YSZ During the Reaction of Ethanol Oxidation
(1998)The perovskite-type oxide La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3) was studied as an ethanol oxidation catalyst-anode as a probable candidate for future application in Solid Oxide Fuel Cells (SOFCs). The investigation was carried ... -
Cation adatom diffusion on the NiO(001) surface by molecular dynamics simulation
(2001)We present results concerning the diffusion of Ni2+ adatom on the (001) surface of NiO obtained by molecular dynamics simulations based on a rigid ion potential model. A wide temperature region was covered ranging from ... -
Cation vacancy diffusion on the NiO(001) surface by molecular dynamics simulations
(1999)We present results concerning the cation vacancy diffusion mechanisms occurring on the NiO(001) surface along with their corresponding migration energies. Using a rigid ion potential and molecular dynamics simulations we ... -
Charge transfer in mixed proton, oxygen ion and electron solid oxide conductor
(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 ... -
Diagnostics of the ions produced by laser ablation of TiC and TIB2
(1998)The composition and the kinetics of the plume produced during the pulsed laser deposition of TiC and TiB2 coatings on metal substrates was studied under film growth conditions. Mass analysis of ions of the ejected material ... -
Direct methanol fuel cells: Methanol crossover and its influence on single DMFC performance
(2004)In the present investigation, the methanol crossover rate through Nafion((R))-115 membrane at different temperatures and different concentrations had been investigated in a fuel cell test apparatus by using gas chromatography ... -
Discrete velocity modelling of gaseous mixture flows in MEMS
(2004)The need of developing advanced micro-electro-mechanical systems (MEMS) has motivated the study of fluid-thermal flows in devices with micro-scale geometries. In many MEMS applications the Knudsen number varies in the range ... -
Dissipative Particle Dynamics investigation of parameters affecting planar nanochannel flows
(2011)The method of Dissipative Particle Dynamics is applied to investigate the effect of the parameters involved in a nano-channel Poisseuille flow. The parameters considered here include (a) fluid/wall interactions, (b) wall ... -
Elastic properties of nanostructured materials with layered grain boundary structure
(2007)Atomistic calculations of the elastic constants for a bulk nanostructured material that consists of a layered structure where alternating layers meet along high angle grain boundaries and where atoms interact via a ... -
Electrochemical Promotion of Pt During the Oxidation of Ethanol
(2001)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 at 325 degrees C at atmospheric total ... -
Energy and exergy analysis of a solid oxide fuel cell plant fueled by ethanol and methane
(2003)The method of exergy analysis is presented for a SOFC power plant involving external steam reforming and fueled by ethanol and methane. The optimal operation parameters of the integrated SOFC plant are specified after ... -
Ethanol And Methane Fueled Solid Oxide Fuel Cells: A Comparative Study
(2001)Ethanol and methane are compared as candidate fuels for generation of electrical power in Solid Oxide Fuel Cells (SOFCs). The thermodynamic analysis of both alternatives was undertaken considering that a SOFC operates with ... -
Ethanol Utilization In Solid Oxide Fuel Cells: A Thermodynamic Approach
(1999)A thermodynamic analysis of electrical power generation in ethanol fueled solid oxide fuel cells (SOFCs) was made in the temperature range between 800-1200 K at atmospheric total pressure. A SOFC was considered being fed ... -
Forced convectional heat transfer in solid oxide fuel cells: An analytical treatment
(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 ... -
Growth of TiB2 and TiC coatings using pulsed laser deposition
(1997)Refractory coatings of TiC and TiB2 have been grown by pulsed laser deposition on Si(100) and on X155 steel at various substrate temperatures ranging from 40 degrees C-650 degrees C. A pulsed KrF excimer laser was used ... -
Hydrogen production over a commercial Pd/Al2O3 catalyst for fuel cell utilization
(2003)In order to produce a hydrogen stream for fuel cell utilization, the study of the ethanol steam reforming process over an alumina supported palladium commercial catalyst was carried out. The effect of the reaction temperature, ...