Directory

Senior Lecturer

University Professor

Functions :

• University Professor (Section 33 Chemistry of Materials), Chemistry Department, Faculty of Science and Technology, Nantes University
• Scientific referent for the X-ray Diffraction platform of IMN’s PLASSMAT platform

Qualifications :

• HDR in Chemistry and Chemistry-Physics (University of Rennes 1) 2012: “Contribution à l’étude des phénomènes structuraux de mise en ordre/désordre par diffusion/diffraction sur grands instruments: des composés moléculaires aux oxydes des métaux de transition” (Contribution to the study of structural ordering/disordering phenomena by scattering/diffraction on large instruments: from molecular compounds to transition metal oxides).
• Doctoral thesis in Materials Science (Université Paris VI Pierre et Marie Curie, Laboratoire Léon Brillouin, UMR 12 CEA/CNRS, CEA/Saclay) 1997: “Etude par diffusion des neutrons du chlorure de bétaïne et de calcium dihydraté sous champ externe appliqué (température, champ électrique, pression hydrostatique)”.
• DEA in Materials Science (Université Paris VI Pierre et Marie Curie) 1993
• Master’s degree in Physics (Université du Maine, Le Mans) 1992

Expertises :

• Ab initio structural resolution on powder and single crystal by XRD
• Structural, Rietveld, sequential or parametric refinements
• Study of static and dynamic disorder using the maximum entropy method (MEM) and anharmonic development of atomic displacement parameters
• TLS analysis of atomic displacement parameters
• Determination of mottled or stacking fault crystal structures
• Determining modulated incommensurate or composite incommensurate crystal structures (misfits): the superspace approach
• Pair distribution function (PDF) analysis coupled with total X-ray and neutron scattering
• Microstructural diffraction analysis
• In situ or operando diffraction
• Determination of magnetic structures by neutron diffraction
• Studies of structural or magnetic phase transitions
• Crystallochemistry of chalcogenides (including oxides) and transition metal clusters

Main research themes:

• Advanced solid-state crystallography (by X-ray, neutron and electron diffraction/diffusion): transition metal chalcogenides, polyoxometallates and organic-inorganic transition element hybrid compounds
• Chemical and electrochemical reactivity, crystallochemical, magnetic and ionic diffusion properties in oxides, mixed anion compounds and transition metal clusters
• Ordering/disordering phenomena in solids
• Advanced crystallographic approaches

Current research projects :

• Layered polychalcogenides (S. Sasaki/L. Cario, ANR COBEDIT)
• Thermoelectric sulfide misfits (D. Berthebaud/S. Jobic/L. Cario)
• Superconducting selenide misfits (L. Cario/S. Sasaki, ANR MISFIT)
• Layered oxychalcogenides with stacking faults (S. Sasaki)
• Luminescent polyoxometallates for water detection (R. Dessapt, Y. Cartigny, ANR ALPS-Water)
• AI-assisted methodology for the discovery of new materials in molten salt (R. Gautier/D. Berthebaud/D. Portehault (LCMCP), MADNESS PEPR DIADEM)
• Mechanochromic luminescence in copper iodide clusters (S. Perruchas)
• Hybrid perosvskites for thermal storage (T. Devic)
• Metal clusters and proton conducting polyoxometallates (S. Cordier (ISCR Rennes), C. Falaise (ILV Versailles), J. Cuny (LCPQ Toulouse), ANR PRESTO submitted)
• Mixed-anion Mo cluster nanoribbons (ISCR Rennes, Institut Josef Stefan, Slovenia)
• Perovskite-derived oxides for SOFC and SOEC applications: defects and diffusion paths (J. Gamon, J.-M. Bassat, ICMCB Bordeaux)
• Lacunar layered perovskites (Kyoto University: H. Kagayama & K. Fujita’s laboratories)

Activities in the research community :

• Member of the CNRS RECIPROCS network (Network of researchers and ITA professionals in structural crystallography)
• Member of the scientific committee for the Association Française de Cristallographie congress in 2026

Biography:

After my PhD thesis in Materials Science (1994-1997: Université Paris VI Pierre & Marie Curie; Laboratoire Léon Brillouin, CEA/Saclay), I spent two post-doctoral years as a contract teacher-researcher: ATER at Université Paris VI Pierre & Marie Curie in 1997-1998 (Laboratoire Léon Brillouin) then ATER at Université de Lille 1 in 1998-1999 (Laboratoire de Dynamique et Structure des Matériaux Moléculaires, UMR CNRS 8024, currently Unité Matériaux et Transformations, UMR CNRS 8207). I was appointed Maître de Conférences des Universités in Section 33 Chemistry of Materials at the University of Rennes 1 in September 1999, in the Structure and Properties of Matter Department. From 1999 to 2006, I was based at the Laboratoire de Chimie du Solide et Inorganique Moléculaire (UMR CNRS 6511), and from 2006 to August 2022 I carried out my research activities at the ISCR (UMR CNRS 6226) in the Inorganic Materials: Soft Chemistry and Reactivity and Solid Chemistry and Materials teams. In 2004-2005, a CRCT allowed me to spend 8 months in the Crystalography Laboratory at EPFL in Switzerland. In September 2022, I was recruited to the Chemistry Department of the Faculty of Science and Technology at Nantes University, within the IMN MIOPS team, following a competitive examination for the 46-1 position of University Professor (section 33 Chemistry of Materials).

Teaching :
For the Chemistry Department of the Faculty of Science and Technology of Nantes University :

• X-ray powder diffraction (M2 A3M)
• Advanced X-ray and neutron diffraction (M2 E-MAT)
• Crystallography and X-ray diffraction (M1 A3M, SdM, LUMOMAT)
• Statistical thermodynamics (L3 PC)
• Group theory (L3 PC)
• Coordination chemistry (L3 C)
• Thermochemistry (L2 C)
• Inorganic Chemistry (L1)
• Thermochemistry and equilibria in aqueous solutions (L1)

For IUT Sciences et Génie des Matériaux, Nantes Université:
Diffraction techniques (BUT3)

For the University of Rennes:
Crystallography (International Master 1 in Chemistry-M1 LUMOMAT)

IMN Level 1 short continuing education course (1 week) “Diffraction in polycrystalline materials”:
X-ray powder diffraction, Symmetry in crystals, Microstructure (external standard and fundamental parameters), Phase quantification

Publications :

Number of publications: 85

Major illustrative publications:

Mechanoresponsive luminescence triggered by phase transition of a supercooled copper(I) complex J. Delafoulhouze, M. Cordier, J.-Y. Mevellec, F. Massuyeau, O. Hernandez, C. Latouche, S. Perruchas CHEMICAL COMMUNICATIONS 60, 5278-5281 (2024)

Exsolution of Co-Fe alloy nanoparticles on the PrBaFeCoO5+ layered perovskite monitored by neutron powder diffraction and catalytic effect on dry reforming of methane P. Managutti, H. Yu, O. J. Hernandez, C. Prestipino, V. Dorcet, H. Wang, T. C. Hansen, M. Bahout ACS APPLIED MATERIALS & INTERFACES 15 (19), 23040-23050 (2023)

Mechanochemical Synthesis and Study of the Local Structure of NaGaS2 Glass and Glass-Ceramics L. Verger, J. Trébosc, B. Baptiste, E. Furet, K. Dénoue, J. Zhang, F. Cheviré, D. Le Coq, L. Calvez, O. Lafon, O. Hernandez INORGANIC CHEMISTRY 61, 46, 18476-18485 (2022)

In Situ Synchrotron Powder Diffraction Study of Cd Intercalation into Chevrel Phases: Crystal Structure and Kinetic Effect J. Barbosa, C. Prestipino, O. J. Hernandez, S. Paofai, C. Dejoie, M. Guilloux-Viry, C. Boulanger INORGANIC CHEMISTRY 58, 3, 2158-2168 (2019)

‘Hybrid Improper Ferroelectricity in (Sr,Ca)3Sn2O7 and Beyond: Universal Relationship between Ferroelectric Transition Temperature and Tolerance Factor in n = 2 Ruddlesden-Popper Phases
S. Yoshida, H. Akamatsu, R. Tsuji, O. Hernandez, H. Padmanabhan, A. Sen Gupta, A. S. Gibbs, K. Mibu, S. Murai, J. M. Rondinelli, V. Gopalan, K. Tanaka, K. Fujita JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140, 15690-15700 (2018)

Site Selectivity of Hydride in Early-Transition-Metal Ruddlesden-Popper Oxyhydrides O. J. Hernandez, G. Geneste, T. Yajima, Y. Kobayashi, M. Okura, K. Aidzu, C. Tassel, S. Paofai, D. Swain, C. Ritter, H. Kageyama INORGANIC CHEMISTRY 57, 11058-11067 (2018)

Structure and reactivity with oxygen of Pr2NiO4+δ: an in situ synchrotron X-ray powder diffraction study T. Broux, C. Prestipino, M. Bahout, S. Paofai, E. Elkaïm, V. Vibhu, J.-C. Grenier, A. Rougier, J.- M. Bassat, O. Hernandez DALTON TRANSACTIONS 45, 3024-3033 (2016)

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, 15315-15321 (2015)

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, 36, 18744-18747 (2012)

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, 6, 507-511 (2012)

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, 32, 7300-7303 (2011)

Patent :

1 submitted (“Matériau à changement de phase solide solide pour la thermalisation et le stockage thermique”, C. Archinard, E. Djanffar, T. Devic, O. Hernandez, A. Saad, E. Zekri, G. Largiller, DV 5547 Réf. SATT Ouest Valorisation, DD25114 Réf. CEA)

University Professor

Fonctions actuelles / Currently

• Professor in Physical Chemistry at the Nantes University
• Director of the Chemistry Teaching Department (01/09/2022 ->01/12/2025)
• Expert at the French Ministry of National Education, “Mission Europe et International pour la Recherche”.

Qualifications

• Professor in Physical Chemistry, PrCE1

Research topics / Research Themes

• Vibrational spectrometry and chemical Reactivity at the interfaces.
• Raman scattering and Infrared Absorption spectroscopies.
• Optical Near Field and sub-wavelength electromagnetic exaltation.
• Vibrational properties of nanostructures.
• Optical instrumentation for the chemistry….

Animation de la recherche / Research Community Activities – Teaching Responsibilities

• Co-supervisor of 22 thesis (20 defended), of 14 years of Post Docs
• Head Leader of the group PMN, Physics of Materials and Nanostructures (-> 31/12/2018)
• Committee Member of the GFSV “Groupe Francais des Spectroscopies de Vibration”.
• Committee Member of the GDR “Plasmonique Moleculaire et Spectroscopie Exaltée” (Molecular Plasmonics and Exalted Spectroscopy)
• Vice Director of the UMR 7564 CNRS-Univ Nancy, “Laboratoire de Chimie et Microbiologie pour l’Environnement”, Université Henri Poincaré – (Jan 2005 – Dec. 2008)
• Group leader of “Chimie et Spectro-Chimie des Interfaces” group (Jan 2002 – Dec 2008)
• Director of the educational department of the Physical Chemistry of the Henri Poincaré University (2004-2006)
• Member of 110 thesis and HDR juries.

Publications

As of 12/2025 :

• 150 publications in international peer-reviewed journals (H-Factor: 46)
• Key Papers :
• Issraa Shahine, Jean-Yves Mevellec, Mireille Richard-Plouet, Bernard Humbert and Pierre-Yves Tessier. J. Phys. Chem. C 2022, 126, 17223-17233, “Nanoporous Gold Stacked Layers as Substrates for SERS Detection in Liquids or Gases with Ultralow Detection Limits and Long-Term Stability.” doi:10.1021/acs.jpcc.2c05903
• Sophie Camelio, et al, and Bernard Humbert *, Nanoscale Advances, (2021), “Linear chains of Ag nanoparticles embedded in dielectric films for SERS applications in analytical chemistry” DOI: 10.1039/d1na00586c
• Adrien Chauvin, et al, Bernard Humbert* and Pierre-Yves Tessier* and Abdelaziz El Mel, Nanoscale, (2020), 12, 12602 “Lamellar nanoporous gold thin films with tunable porosity for ultrasensitive SERS detection in liquid and gas phase” DOI: 10.1039/d0nr01721c
• Angelina D’Orlando, Jean-Yves Mevellec, Guy Louarn and Bernard Humbert . J. Phys. Chem. C (2020) 124, 4, 2705-2711 “AFM Nano-Manipulation by Confocal Raman Multiwavelength Spectroscopy: Application at the Monitoring of Resonance Profile Excitation Changes of Manipulated Carbon Nanotube”, doi.org/10.1021/acs.jpcc.9b10096
• Dominik J. Winterauer*, Daniel Funes-Hernando, Jean-Luc Duvail, Saïd Moussaoui, Tim Batten, and Bernard Humbert, Applied Spectroscopy (2019) vol 73, iss8, 902-909 ” Sub-micron Spatial Resolution in Far-Field Raman Imaging Using Positivity-Constrained Super-Resolution” (DOI: 10.1177/0003702819832355)
• William Dudefoi, Hélène Terrisse, Mireille Richard-Plouet, Eric Gautron, Florin Popa, Bernard Humbert and Marie-Hélène Ropers*, Food Additives & Contaminants: part, (2017), “Criteria to define a more relevant reference sample of titanium dioxide in the context of food: a multiscale approach” doi.:10.1080/19440049.2017.1284346
• Carteret, C.; Dandeu, A.; Moussaoui, S.; Muhr, H.; Humbert, B.; Plasari, E. Crystal Growth & Design (2009) 9(2), 807-812, “Polymorphism Studied by Lattice Phonon Raman Spectroscopy and Statistical Mixture Analysis Method. Application to Calcium Carbonate Polymorphs during Batch Crystallization.”
• M. Mullet, F. Demoisson, B. Humbert, D. Vantelon and L. Michot, Geochim. Cosmo. Chim. Acta 71, 3257-3271 (2007) “Aqueous Cr(VI) reduction by pyrite: speciation and characterisation of the solid phases by X-ray photoelectron, Raman and X-ray absorption spectroscopies. ”
• E. Rinnert , C. Carteret, B. Humbert, et al. and L.J. Michot, J. Phys. Chem.B 109(49), 23745-23759 (2005). “Hydration of a synthetic clay with tetrahedral charges: a multidisciplinary experimental and numerical study.”
• V. Mazet, C. Carteret, D. Brie, J. Idier and B. Humbert, Chemometric and intelligent laboratory systems, 76(2), 121-133 (2005) “Background removal from spectra by designing and minimizing a non-quadratic cost function. “
• C. Eypert-Blaison, B. Humbert, L. Michot, M. Pelletier, E. Sauzeat and F. Villièras, Chem. Mater. 13 (12), 4439-4446 (2001). “Structural Role of Hydration Water in Na- and H-Magadiite :A Spectroscopic Study”.
• N. Phambu, B. Humbert and A. Burneau, Langmuir 16 (15), 6200-6207 (2000) “Relation between the infrared spectra and the lateral specific areas of gibbsite samples”
• ) J. Grausem, B. Humbert, M. Spajer, D. Courjon and A. Burneau. Burneau, J. Raman Spectrosc. 30 (9), 833-840 (1999)“Near field Raman spectroscopy.”
• H. Wilhelm, B. Humbert, M. Lelaurain and E. McRae, J. Appl. Phys.84 (12), 6552-58 (1998)“Raman spectroscopic studies on well defined carbonaceous materials of strong 2D character.”
• 6 book chapters
• Since (1992):
• 36 invited talks: 15 national and 21 international conferences,
• 100 oral conference presentations, 4 invited seminars,
• 6 (co)organisation of conferences.

CNRS Research Director

CNRS Research Director

University Professor

Position:

Full Professor

Qualifications:

• Professor in Chemistry of materials at University of Nantes”.
• Director of the French Research Network on Hydrogen (FRH2) from CNRS
• Chair of ST2E group of “Institut des Matériaux de Nantes Jean Rouxel” (IMN).
• Scopus ID: 7007036225

Expertise:

• High temperature Fuel Cells (SOFC) and electrolysers (SOEC)
• Solid state and materials chemistry
• Synthesis (Solid state and combustion methods) and characterization of ceramic materials (X-ray diffraction, Electrochemical Impedance Spectroscopy, Thermal analysis…)
• Fuel cell performance testing

Major research interests:

His main research interests are in the development of new oxide materials for technological applications, including High Temperature fuel cells (SOFC and PCFC). Particular focus in recent years has been the development of new electrolyte for solid oxide fuel cell materials, with very promising results being observed for brownmillerite-type oxide ion and proton conductors. In addition to this work in this area, his group also has ongoing research in the development of anode and cathode and the realization and testing of complete cellsProjets de recherche en cours

Biography:

Olivier Joubert (1965) is presently full professor in Chemistry of Materials at University of Nantes and is Chair of electrochemical storage and conversion of energy group (ST2E) of “Institut des Matériaux Jean Rouxel (CNRS-IMN)” and Member of the Board of Directors of the International Association for Hydrogen Energy (IAHE). IMN lab is a Joint Research Unit between CNRS & Nantes University with approximately 150 people. The major research interests of professor Joubert revolve around development of new materials for technological applications such as high and intermediate temperature ceramic Solid Oxide (SO) fuel or electrolyser cells (SOFC and SOEC). He is a solid state chemist and his research activities involve development of new oxide materials like, novel perovskite-type ion and proton conductors and anode for SO Cells. He is co-author of 140 publications, 67 invited talks and 5 patents.

Olivier Joubert is chairing the French Research Network on Hydrogen Energy (FRH2 with about 300 permanent researchers) which assembles all French academic research groups in the field of electrolysis production and storage of hydrogen and also its conversion to electricity using fuel cell. His group is part of FRH2 network and is involved in many national and european projects around SOFC technology. He is also the main organizer of the International Discussion on Hydrogen Energy and Applications (IDHEA) held in Nantes in 2014 and 2016.

Between 2014 and 2020, O. Joubert was also in charge of the expertise cell ERIMAT in Capacités SAS, a private subsidiary of the University of Nantes dedicated to the development of research, and provides assessment, advice to industries.

Publications:

• 140 publications (J. of Power Sources, International J. of Hydrogen Energy, Solid State Ionics, Catalysis Today, Fuel Cells, Adv. Mater, Angew. Chem …), 67 invited talks, 3 book Chapters
• h index (Scopus): 32 (>3200 citations)
• 5 patents
• 21 PhD supervision (4 are running)
• 28 PhD final reports including 4 international

6 most significant and recent publications:

• Incorporation of water and fast proton conduction in the inherently oxygen deficient compound La26O27¨(BO3)8
  S. Noirault, S. Célérier, O. Joubert, M. T. Caldes and Y. Piffard
  Adv. Mater. 2007, 19, 867-870 (2007)
• Metallic Nanoparticles and Proton Conductivity: Improving Proton Conductivity of BaCe0.9Y0.1O3-δ using a Catalytic Approach
  M. T. Caldes, K. V. Kravchyk, M. Benamira, N. Besnard, V. Gunes, O. Bohnke, and O. Joubert
  Chem. Mater. 24, 4641-4646 (2012)
• Electrochemical Study of a SOFC fuelled with various gaseous mixtures issued from biomass gasification
  Annie Le Gal La Salle, François Ricoul, Olivier Joubert, Anthony Kerihuel and Albert Subrenat
  Fuel Cells, 17-2, 144-150, 2017
• Electrochemical Study of the Versatility of a Solid Cell Working both as Fuel Cell and Electrolysis Modes
  E. Pichot, M. Olivon, A. Perraud, O. Joubert, A. Le Gal La Salle
  FUEL CELLS 20, No. 3, 332-341 (2020)
• Recycling and characterization of end-of-life solid oxide fuel/electrolyzer ceramic material cell components.
  Gudaysew Tsegaye Yenesew, Eric Quarez, Annie Le Gal La Salle, Clement Nicollet and Olivier Joubert.
  RESOURCES CONSERVATION AND RECYCLING 190, 106809 (2023)
• Cold-sintering and Li doped ZnO sintering aid for the densification of BaZr0.7Ce0.2Y0.1O3-δ proton conducting ceramics.
  P. Castellani, E. Quarez, C. Nicollet, O. Joubert, N. Gautier, P. Pers, G. Taillades and A. Le Gal La Salle
  International Journal of Hydrogen Energy 54 (2024) 1343-1356

CNRS Research Director