Laboratoire de Physique de la Matière Condensée

Responsable du Groupe Electrochimie et Couches Minces

Contact :
fouad.maroun-AT-polytechnique.edu

+33 (0)1 69 33 46 57

Research field :
I study, at the nanometer scale, the fundamental aspects of the electrochemical deposition of ultra–thin metal oxide films and the properties of these films in operando. My aim is to correlate the electrochemical and physical properties with the local atomic structure and redox properties. I also study the influence of infrared excitations on the kinetics of electrochemical reactions. My main expertise is the scanning probe microscopies, X–Ray diffraction and absorption, infrared spectroscopy and magnetic measurements all operated in solution.

Research activity :
October 2016 : CNRS research director at the laboratory "Physique de la Matière Condensée" Ecole Polytechnique (Palaiseau France).
June 2013 : habilitation for directing research (HDR) from Versailles University
December 2000 : full CNRS researcher, from December 2000 to March 2003 at the laboratory "Interfaces et Systèmes Electrochimiques" Université Pierre et Marie Curie (Paris) and since 2003 at the laboratory "Physique de la Matière Condensée" Ecole Polytechnique (Palaiseau France).
October 1998 – November 2000 : postdoctoral researcher at the Institute of Surface Chemistry and Catalysis, University of Ulm (Germany), in the group of Prof. R. J. Behm and Prof. O. M. Magnussen
September 1995 – September 1998 : PhD thesis at the laboratory "Physique de la Matière Condensée" Ecole Polytechnique (Palaiseau France) under the supervision of Dr J. N. Chazalviel and Dr. F. Ozanam.

Teaching activity :
2010 - 2017 : Master 2 Nanosciences, University Paris–Sud Orsay, in charge of the course "Mobile charges in Physics and Chemistry" (30 hours) and of the Microscopy and Magnetism practicals (35 hours).
2008–2015 : Ecole des Mines de Paris, L3 and M1 levels, Quantum Mechanics, Statistical Physics and Nuclear Physics, exercise teacher, 19 hours.

Responsabilities :
Since 2017 : responsible of the “Electrochimie et Couches Minces” team
2011 - 2016 : elected representative of the Ecole Polytechnique research center for the Ecole Polytechnique Administration Council.
Since 2007 : responsible of scanning probe and scanning electron microscopes of the laboratory
2009–2012 : Scientific comity member of the conference "Journées Surfaces Interfaces"
2006–2010 : elected member of the laboratory council
2004–2010 : laboratory week seminar organization

Selected publications :
1- Operando Surface X-Ray Diffraction Studies of Epitaxial Co3O4 and CoOOH Thin Films During Oxygen Evolution : pH Dependence, Qiu, CR ; Maroun, F ; Bouvier, M ; Pacheco, I ; Allongue, P ; Wiegmann, T ; Scharf, CH ; de Manuel-Gonzalez, V ; Reikowski, F ; Stettner, J ; Magnussen, OM, ChemCatChem 16 (2024) e202400988
2- Unraveling the Cobalt Oxidation State at the Surface of Epitaxial Cobalt Oxide Films during the Oxygen Evolution Reaction by Operando X-ray Absorption Spectroscopy/Surface X-ray Diffraction, Bouvier, M. ; Bubi ; I. P. ; Wiegmann, T. ; Qiu, C. R. ; Allongue, P. ; Magnussen ; O. M., Maroun, F, ACS Applied Energy Materials 2023, 6, 7335-7345
3- Growth of Ultrathin Well-Defined and Crystalline Films of Co3O4 and CoOOH by Electrodeposition, Pacheco, I. ; Bouvier, M. ; Magnussen, O ; M., Allongue ; P., Maroun, F., Journal of the Electrochemical Society 2023, 170, 012501
4- Operando identification of the reversible skin layer on Co3O4 as a three-dimensional reaction zone for oxygen evolution, Wiegmann, T. ; Pacheco, I. ; Reikowski, F. ; Stettner, J. ; Qiu, C. ; Bouvier, M. ; Bertram, M. ; Faisal, F. ; Brummel, O. ; Libuda, J. ; Drnec, J. ; Philippe Allongue, P. ; Maroun, F. ; Magnussen, O. M., ACS Catal. 12 (2022) 3256–3268
5- Electrochemical stability of the reconstructed Fe3O4(001) surface, Grumelli, D. ; Wiegmann, T. ; Barja, S. ; Reikowski, F. ; Maroun, F. ; Allongue, P. ; Balajka, J. ; Parkinson, G. S. ; Diebold, U. ; Kern, K. ; Magnussen, O. M., Angewandte Chemie Int. Ed., 59 (2020)
6- In Situ Monitoring of Electric Field Effect on Domain Wall Motion in Co Ultrathin Films in Direct Contact with an ElectrolyteLamirand, A. D. ; Adam, J.-P. ; Ravelosona, D. ; Allongue, P. ; Maroun, F., Appl. Phys. Lett., 2019, 115, 032402
7- Operando Surface X-ray Diffraction Studies of Structurally-defined Co3O4 and CoOOH Thin Films during Oxygen EvolutionReikowski, F. ; Maroun F. ; Pacheco, I. ; Wiegmann, T. ; Allongue, P. ; Stettner, J. ; Magnussen, O. M., ACS Catalysis, 9 (2019) 3811-3821