Laboratory of Chemistry & Materials Technology
RESEARCH
Solid Oxide Fuel Cell Technology
Short Description
Conductivity relaxation setup
Fabrication of MIEC & Proton Conductive membranes
Layers Deposition techiques.
Relevant Publications
P. Pandis, T. Kharlamova, V. Sadykov, and V. N. Stathopoulos, Development of layered anode structures supported over apatite-type solid electrolytes, MATEC Web of Conferences, 41 (2016) 04001.
P.K. Pandis, E. Xenogiannopoulou, P.M. Sakkas, G. Sourkouni, C. Argirusis, V.N. Stathopoulos, Compositional effect of Cr contamination susceptibility of La9.83Si6-x-yAlxFeyO26±δ apatite-type SOFC electrolytes in contact with CROFER 22 APU, RSC Advances, 6 (2016) 49429-49435.
H. Gasparyan, S. Neophytides, D. Niakolas, V. Stathopoulos, T. Kharlamova, V. Sadykov, O. Van der Biest, E. Jothinathan, E. Louradour, J.P. Joulin, S. Bebelis, Synthesis and characterization of doped apatite-type lanthanum silicates for SOFC applications, Solid State Ionics, 192 (2011) 158-162.
H. Gasparyan, C. Argirusis, C. Szepanski, G. Sourkouni, V. Stathopoulos, T. Kharlamova, V.A. Sadykov, S. Bebelis, Electrochemical Characterization of a La0.8Sr0.2Ni0.4Fe0.6O3-δ Electrode Interfaced with La9.83Si5Al0.75Fe0.25O26{plus minus}δ Apatite-type Electrolyte, ECS Transactions, 25 (2009) 2681-2688.
Heterogenous catalysis
Short Description
Application of inorganic ceramic materials in Heterogeneous Environmental Catalysis in novel catalytic technologies.
Relevant Publications
M.A. Goula, N.D. Charisiou, P.K. Pandis and V.N. Stathopoulos, Ni/apatite-type lanthanum silicate supported catalyst in glycerol steam reforming reaction, RSC Advances, 6 (2016) 78954-78958.
V.N. Stathopoulos, V.C. Belessi, T.V. Bakas, S.G. Neophytides, C.N. Costa, P.J. Pomonis, A.M. Efstathiou, Comparative study of La–Sr–Fe–O perovskite-type oxides prepared by ceramic and surfactant methods over the CH4 and H2 lean-deNOx, Applied Catalysis B: Environmental, 93 (2009) 1-11.
V.N. Stathopoulos, C.N. Costa, P.J. Pomonis, A.M. Efstathiou, The CH4/NO/O2 “Lean-deNOx” Reaction on Mesoporous Mn-Based Mixed Oxides, Topics in Catalysis, 16-17 (2001) 231-235.
V. Stathopoulos, V. Belessi, A. Ladavos, Samarium Based High Surface Area Perovskite Type Oxides SmFe1-XAlXO3 (X=0.00, 0.50, 0.95). Part II, Catalytic Combustion of CH4, Reaction Kinetics and Catalysis Letters, 72 (2001) 49-55.
V. Stathopoulos, V. Belessi, A. Ladavos, Samarium Based High Surface Area Perovskite Type Oxides SmFe1-XAlXO3 (X=0.00, 0.50, 0.95). Part I, Synthesis and Characterization of Materials, Reaction Kinetics and Catalysis Letters, 72 (2001) 43-48.
Shaping of ceramics and hybrid materials
Short Description
We have optimized the parameters of gel-casting method in order to produce custom made MIEC and proton conductive ceramic tubes & rods.
Relevant Publications
V. Chalkia, E. Marathoniti, V.N. Stathopoulos, A facile method for the preparation of ceramic beads with hierarchical porosity, Ceramics International, (2017) In press accepted manuscript
V. Chalkia, P. Pandis, V.N. Stathopoulos, Shape Forming of Ceramic Tubes for Electrochemical Reactors by Gel-Casting Method, ECS Transactions, 68 (2015) 2339-2348.
Synthesis and characterization of Thermal Barrier Coatings
Short Description
We have synthesized dry and wet feedstock materials for Thermal Barrier Coatings, with special microstructure and enhanced performace. Thermal cycling testing and thermal shock testing rigs are available for temperatures up to 1300oC and 1500oC repsectively.
Relevant Publications
N. Vourdas, E. Marathoniti, P.K. Pandis, Chr. Argirusis, G. Sourkouni, C. Legros, S. Mirza, V.N. Stathopoulos, Evaluation of LaAlO3 as top coat material for thermal barrier coatings, Transactions of Nonferrous Metals Society of China, (2017), In press accepted manuscript
V. Stathopoulos, V. Sadykov, S. Pavlova, Y. Bespalko, Y. Fedorova, L. Bobrova, A. Salanov, A. Ishchenko, V. Stoyanovsky, T. Larina, V. Ulianitsky, Z. Vinokurov, V. Kriventsov, Design of functionally graded multilayer thermal barrier coatings for gas turbine application, Surfaces & Coatings Technology (2015) In Press.
Wetting Transitions
Short Description
We have proposed an alternative method to control and reversibly switch the mobility of liquid droplets onto porous surfaces. The backpressure of the porous medium is adjusted to favor the antiwetting (or wetting) pressures and therefore render the droplet mobile (or sticky). This principle for switching the mobility of a droplet can be applied in various hydrophobic porous media with different size characteristics, in media after ageing, or even if the surface roughness increases to high values, with no prerequisites for hierarchical or superhydrophobic initial state. It can also be applied underwater, or can be integrated in microfluidic devices.
Relevant Publications
N. Vourdas, G. Pashos, G. Kokkoris, A. G. Boudouvis, and V. N. Stathopoulos, Droplet mobility manipulation on porous media using backpressure, Langmuir, 32 (2016) 5250–5258.
N. Vourdas, C. Ranos, V.N. Stathopoulos, Reversible and dynamic transitions between sticky and slippery states on porous surfaces with ultra-low backpressure, RSC Advances, 5 (2015) 33666-33673.
Fluidic Valving
Short Description
We propose the application of ultra-low backpressure on porous media, as means for valving in microfluidics. The aim is to fabricate and characterize a component for droplet flow manipulation. This project has gained financial support from the John S. Latsis Public Benefit Foundation,through the "Scientific Projects 2015" program.
Relevant Publications
N. Vourdas, K. Dalamagkidis and V. Stathopoulos, Active porous valves for plug actuation and plug flow manipulation in open channel fluidics, RSC Advances, 5 (2015) 104594-104600.
Active control of droplet mobility after impingement on porous surfaces
Short Description
Droplet impingement onto surfaces plays a crucial role in a variety of processes, including fog harvesting, anti-icing, dropwise condensation and spray coating. We have presented a generic method to reversibly switch the mobility of a droplet after impingement onto a hydrophobic porous surface, from a sticky to a slippery state and back.
Relevant Publications
N. Vourdas, A. Tserepi, V.N. Stathopoulos, Reversible pressure-induced switching of droplet mobility after impingement on porous surface media, Applied Physics Letters, 103 (2013) 111602.