Vasiliki Papaefthimiou

Researcher in Physicochemistry

Institut de Chimie et Procédés pour l’Énergie, l’Environnement et la Santé (ICPEES)

Tel: +33 (0)3 68 85 27 55
E-mail: papaefthymiou@unistra.fr
ECPM, Bâtiment R3, Niv1, BU2
Keywords: Physics and Chemistry of solid surfaces, characterization of solid surfaces

Research activities

• Physics and Chemistry of solid surfaces and their interaction with gases. Nanoalloys in catalysis.

• Preparation and characterization of realistic model catalysts.

• Characterization of organic materials (oligomers, self-assembled monolayers, graphene)

• Construction and characterization of Polymer Electrolyte Membrane Fuel Cells, PEM-FC.

• Construction and characterization of solid Oxide Fuel Cells, SOFC.

Specialization

• Physics and chemistry of solid surfaces.

• Surface characterization techniques

• Photoelectron and Auger Electron Spectroscopy (ΧPS, UPS, XAES, AES).

• Temperature Programmed Desorption / Reaction (ΤPD, TPR).

• Work Function measurements (Kelvin Probe detector, Ultraviolet Photoelectron spectroscopy (UPS)), electrochemical measurements (CV, cyclic voltammetry etc), Infrared Spectroscopy.

• Soft Χ- Ray synchrotron radiation techniques (photoelectron spectroscopy, X-ray absorption spectroscopy; APPES, NEXAFS).

• Theoretical simulation of NEXAFS spectra.

Selected publications:

1. On the active surface state of nickel-ceria solid oxyde fuel cell anodes during methane electrooxydation; V.Papaefthimiou, M.Shishkin, D.K.Niakolas, M.Athanasiou, Y.T.Law, R.Arrigo, D.Teschner, M.Hävecker, A.Knop-Gericke, R.Schlögl, T.Ziegler, S.G.Neophytides, S.Zafeiratos, Advanced Energy Materials, 10.1002/aenm.201200727
2. Probing metal-support interaction in reactive environments: an in situ study of PtCo bimetallic nanoparticles supported on TiO₂, V.Papaefthimiou, T.Dintzer, M.Lebedeva, D.Teschner, M.Hävecker, A.Knop-Gericke, R.Schlögl, V.Pierron-Bonnes, E.Savinova, S.Zafeiratos, Journal of Physical Chemistry C, 2012, 116, 14342-14349
3. Non-trivial redox behavoir of nanosized cobalt: new insights from ambient pressure X-ray photoelectron and absorption spectrosciopies, V.Papaefthimiou, T.Dintzer, A.Tamion, F.Tournous, A.Hilion, D.Teschner, M.Hävecker, A.Knop-Gericke, R.Schlögl, S.Zafeiratos, ACS Nano, 2011, 5, 2182
4. Switchible surface - responsive polymer layer, V.Papaefthimiou, R.Steiz, G.H.Findenegg, Chimie in Unserer Zeit, 2008, 42, 102
5. The electronic structure of Ni-phtalicyanine/metal interfaces studied by X-ray and ultraviolet photoelectron spectroscopy, F. Petraki, V.Papaefthimiou, S.Kennou, Org.Electr., 2007, 8, 522

Education

• 2002-2005: Ph. D. in Surface Science, Department of Chemical Engineering, University of Patras, Greece

• 2000-2002: Master of Science in «Science and Technology of materials», Department of Chemical Engineering, University of Patras, Greece

• 1991-1996: Bachelor of Science,, Department of Chemistry, University of Patras, Greece

Thèmes de recherche

Utilisation des techniques classiques de la surface pour:

• l’étude des matériaux organiques (oligomères, monocouches auto-assemblées, graphène)

• l’étude des piles à combustible à oxyde solide

• la caractérisation de catalyseurs modèles réalistes

• l’étude des nanoalliages

• l’étude de la physique et chimie des surfaces solides et leur interaction avec les gaz

Formation

2002-2005 Thèse de doctorat (NR) en Génie Chimique, Université de Patras, Grèce.

2000-2002 Master 2 en Science et Technologie des Matériaux, Univ. de Patras, Grèce

1991-1996 Licence de Chimie, Université de Patras, Grèce

Publications récentes

• Chen, D.; Mewafy, B.; Paloukis, F.; Zhong, L.; Papaefthimiou, V.; Dintzer, T.; Papazisi, K. M.; Balomenou, S. P.; Tsiplakides, D.; Teschner, D.; Pérez-Dieste, V.; Escudero, C.; Zafeiratos, S. Revising the Role of Chromium on the Surface of Perovskite Electrodes: Poison or Promoter for the Solid Oxide Electrolysis Cell Performance? Journal of Catalysis 2020, 381, 520–529.
• Lee, S.; Halder, A.; Ferguson, G. A., Seifert, S., Winans, R. E., Teschner, D.; Schlögl R. Papaefthimiou, V.; Greeley, J.; Curtiss, L. A.; Vajda, S. Subnanometer cobalt oxide clusters as selective low temperature oxidative dehydrogenation catalysts,          Nature Communications 2019, 954
• Oshchepkov, A. G.;Bonnefont, A.; Pronkin S. N.; Cherstiouk, O. V.; Ulhaq-Bouillet C.; Papaefthimiou, V.; Parmon, V. N.;  Savinova, E. R.; Nanostructured nickel nanoparticles supported on vulcan carbon as a highly active catalyst for the hydrogen oxidation reaction in alkaline media Journal of Power Sources 2018, 402, 447-452
• Ba, H.; Liu,Y.; Wang, W.; Duong-Viet, C.; Papaefthimiou, V.; Nguyen-Dinh, L.; Tuci, G.; Giambastiani, G.; Pham-Huu,Cuong.; Carbon Felt Monoliths Coated with a Highly Hydrophobic Mesoporous Carbon Phase for the Continuous Oil Sorption/Filtration from Water Advanced Sustainable Systems 2018, 2, 1800040
• Papaefthimiou, V.; Niakolas, D. K.; Paloukis, F.; Teschner, D.;, Knop-Gericke, A.; Haevecker, M.; Zafeiratos, S.; Operando observation of nickel/ceria electrode surfaces during intermediate temperature steam electrolysis, Journal of Catalysis, 2017, 352, 305-313