Olivier Hernandez

UR1 Associate Professor

Email : olivier [dot] hernandez [at] univ-rennes1 [dot] fr

Phone : +33 (0)2 23 23 56 35

Office number : Beaulieu - Building 10B - 120

Education and professional experience

Dr. Olivier Hernandez, born 1970, is Associate Professor (Maître de Conférences) in Chemistry at University of Rennes 1, faculty of Science and Properties of Matter. After a Bachelor in Physics at Université du Maine, Le Mans, he got in 1993 a Master 2 degree in Materials Sciences (magna cum laude) at University Pierre et Marie Curie (UPMC, Paris VI). Between 1994 and 1997 he undertook his PhD thesis (UPMC) in Materials Sciences at Laboratory Léon Brillouin, CEA/Saclay. After two years as Lecturer at UPMC (Laboratory Léon Brillouin, CEA/Saclay) then to University Lille 1 (Laboratory of Dynamics and Structure of Molecular Materials) he was recruited in 1999 at the laboratory of Solid State Chemistry, University of Rennes 1. In 2005 he spent eight months as invited researcher at Laboratory of Crystallography, EPFL, Switzerland. In 2012 he defended at University of Rennes 1 his habilitation to supervise research in Chemistry and Physical-Chemistry.

Research themes

Solid state materials for energy or catalysis (transition metal oxides or cluster compounds): chemical or electrochemical reactivity versus multiscale structural properties

Technical skills

Advanced structural analyses by neutron and/or X-ray diffraction/scattering on single-crystal or powder: crystal structure solution & refinement, microstructure, maximum entropy method, pair distribution function method, superspace approach, magnetic structures

Teaching activities

• Large scale facilities (M2 Solid State Chemistry and Materials, M1 Chemistry)

• Crystallography (M1 Chemistry)

• Techniques of diffraction (L3 Chemistry)

• Solid state chemistry (L3 Chemistry)

• Advanced materials (L3 Sciences)

• Symmetry & group theory (ESIR 1 Materials)

• Smart materials (L1-L2 Sciences)

• Crystal field & crystal chemistry (L2 Physics-Chemistry)

• Atomistic & chemical entities (L1 Physics-Chemistry-Geosciences)

• Chemical thermodynamics (L1 Physics-Chemistry-Geosciences, L2 Chemistry, L3 Chemistry, L3 Physics-Chemistry, ESIR 2 Materials)

Membership of professional organizations

Member of Яéciprocs, CNRS professional network of structural crystallographers

Committee work

• Elected member at the administration council, University of Rennes 1 (2012- 2016)

• Member of the international affairs committee (plenary & restricted), University of Rennes 1 (2012- 2016)

• Member of the committee of the common documentation service, University of Rennes 1 (2012- 2016)

Scientific Collaborations

• Pr. Hiroshi Kageyama. Department of Energy & Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Japan

• Pr. Koji Fujita. Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Japan

• Dr. Guilhem Dezanneau. Laboratoire Structures, Propriétés et Modélisation des Solides, UMR CNRS 8580, CentraleSupelec, Châtenay-Malabry, France

• Dr. Olivier Mentré. Unité de Catalyse et Chimie du Solide, UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Villeneuve d'Ascq, France


Chemical/electrochemical reactivity, order/disorder in solid state materials, transition metal oxides, perovskite-derived compounds, SOFC, transition metal cluster compounds, neutron diffraction, laboratory and synchrotron X-ray diffraction, in situ experiments, advanced structural analyses

Selected publications

Among 65 international review committee articles with which I am co-author (end of 2016).


1- Hydride in BaTiO2.5H0.5: A Labile Ligand in Solid State Chemistry”, N. Masuda, Y. Kobayashi, O. Hernandez, T. Bataille, S. Paofai, H. Suzuki,C. Ritter, N. Ichijo, Y. Noda, K. Takegoshi, C. Tassel, T. Yamamoto, H. Kageyama, Journal of the American Chemical Society, 137, 15315 (2015)

2- Unprecedented high solubility of oxygen interstitial defects in La1.2Sr0.8MnO4+d up to d = 0.42 revealed by in situ high temperature neutron powder diffraction in flowing O2”, T. Broux, C. Prestipino, M. Bahout, O. Hernandez, D. Swain, S. Paofai, T. C. Hansen, C. Greaves, Chemistry of Materials, 25, 4053 (2013).

3- Oxygen diffusion mechanism in the mixed ion-electron conductor NdBaCo2O5+x”, Y. Hu, O. Hernandez, T. Broux, M. Bahout, J. Hermet, A. Ottochian, C. Ritter, G. Geneste, G. Dezanneau, Journal of Materials Chemistry, 22, 18744 (2012).

4- An oxyhydride of BaTiO3 exhibiting hydride exchange and electronic conductivity”, Y. Kobayashi, O.J. Hernandez, T. Sakaguchi, T. Yajima, T. Roisnel, Y. Tsujimoto, M. Morita, Y. Noda, Y. Mogami, A. Kitada, M. Ohkura, S. Hosokawa, Z.F. Li, K. Hayashi, Y. Kusano, J.E. Kim, N. Tsuji, A. Fujiwara, Y. Matsushita, K. Yoshimura, K. Takegoshi, M. Inoue, M. Takano, H. Kageyama, Nature Materials, 11, 507 (2012).

5- Tetrahedral Mo4 clusters as building blocks for the design of clathrate-related giant frameworks”, M.A. Shestopalov, A.Y. Ledneva, S. Cordier, O. Hernandez, M. Potel, T. Roisnel, N.G. Naumov, C. Perrin, Angewandte Chemie International Edition, 50, 7300 (2011).

Publications referenced in HAL