A5103148644- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Industrial Gas Emission Control
- Electrocatalysts for Energy Conversion
- Mesoporous Materials and Catalysis
- Catalysts for Methane Reforming
- Radioactive element chemistry and processing
- Ammonia Synthesis and Nitrogen Reduction
- Bone Tissue Engineering Materials
- Graphite, nuclear technology, radiation studies
- Nuclear and radioactivity studies
- Nanomaterials for catalytic reactions
- Nuclear Physics and Applications
- Transition Metal Oxide Nanomaterials
- Nuclear reactor physics and engineering
- Luminescence Properties of Advanced Materials
- Zeolite Catalysis and Synthesis
- Contemporary art, education, critique
- Dental materials and restorations
- Thermal and Kinetic Analysis
- Nanocluster Synthesis and Applications
- Risk and Safety Analysis
- Pigment Synthesis and Properties
- Catalysis for Biomass Conversion
Sorbonne Université
2014-2025
Laboratoire de Réactivité de Surface
2016-2025
Marie Curie
2025
Centre National de la Recherche Scientifique
2013-2024
Sorbonne University Abu Dhabi
2023
Université Claude Bernard Lyon 1
2022
Délégation Paris 6
2014-2021
Délégation Ile-de-France Villejuif
2021
UPMC Health System
2014-2017
PricewaterhouseCoopers (South Korea)
2015
The Lewis and Brønsted basic properties of a stoichiometric hydroxyapatite (HAp) were investigated by infrared spectroscopy following the adsorption desorption processes acidic molecule, CO2, C2H2. CO2 interacts with OH– O2– PO43– groups to form hydrogenocarbonates surface carbonates, respectively. It also generates type A carbonates related water upon substitution two neighboring structural groups. Water modifies HAp decreasing carbonatation enhancing formation hydrogenocarbonates, promotes...
Metal borides have mostly been studied as bulk materials. The nanoscale provides new opportunities to investigate the properties of these materials, e.g., hardening and surface reactivity. are often considered stable solids because their covalent character, but little is known on behavior under a reactive atmosphere, especially reductive gases. We use molten salt synthesis at 750 °C provide cobalt monoboride (CoB) nanocrystals embedded in an amorphous layer cobalt(II) partially oxidized...
Abstract Operando DRIFTS is used to identify the nature and role of surface sites hydroxyapatites (HAps) involved in catalytic transformation ethanol n ‐butanol. The processes occurring upon a first reaction step followed by under He flow greatly influence reactivity HAps subsequent second step. Ethanol found be mostly activated basic OH − groups HAps, as indicated concomitant recovery conversion flow. drastic changes selectivity observed during reveal key acidic cooperatively acting with...
Cobalt deposition in an excess of solution was used to design Co-modified hydroxyapatite materials with various Co loadings and controlled dispersion. It is rationalized how the properties supports (more or less stoichiometric compositions, nanorod platelet morphologies crystalline (100) zig-zag termination non-apatitic hydrated external layer), influence immobilization processes by operating either slightly acidic (natural) basic pH suspension media. Four cobalt mechanisms impacting final...
Hydroxyapatite (HAp)‐supported cobalt catalysts have been evaluated in the oxidative dehydrogenation of propane to propene (ODHP). The morphology HAp supports and immobilisation mechanisms strongly influence surface accessibility species their dispersion. A calibration curve obtained from NO‐TPD experiments for cobalt‐exchanged materials allowed us derive densities. These values were used better compare evolution conversion selectivity, as well analyse parameters governing these...
We report phase selective synthesis of intermetallic nickel silicide nanocrystals in inorganic molten salts. NiSi and Ni2Si are obtained by reacting a nickel(ii) salt sodium Na4Si4 the LiI-KI eutectic mixture. that precursors to active electrocatalysts oxygen evolution reaction (OER) may be low-cost alternatives iridium-based electrocatalysts.
The addition of H2 has been reported to promote drastically the selective catalytic reduction NOx by hydrocarbons (HC-SCR). Yet, influence Ag loading on H2-promoted HC-SCR subject a very limited number investigations. H2-HC-SCR earlier studies mostly Ag/Al2O3 samples containing about 2 wt% Ag, since this particular shown provide optimum performances in reaction absence H2. present study highlights for first time that H2-C3H6-SCR improved 150–550 °C temperature domain as (Ag surface density:...
Even though vanadium-modified hydroxyapatite (V-HAp) samples are very promising systems for oxidative dehydrogenation of propane, the incorporation vanadium into framework was reported to be limited and lead over-stoichiometric compounds. Here, synthesis a Ca10(PO4)6-x(VO4)x(OH)2 stoichiometric solid solution using co-precipitation method is monitored in whole composition range (0 ≤ x 6) by controlling pH precipitation medium, with continuous (the first series samples) or periodic second...
The present study combines experimental and theoretical approaches to investigate the competitive precipitation of calcium phosphates (CaPs) in aqueous solution order understand control both structural textural properties synthesized hydroxyapatites (HAps). Some reactions were followed by situ Raman spectroscopy or achieved under kinetically controlled conditions. CaP precursors HAps identified as a function pH medium introduction precursor ions synthesis reactor. Their formation was...
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NOx adsorption−desorption experiments were carried out on a series of W-free and W-containing ZrO2 samples. To the best our knowledge, this study establishes for first time NOx-TPD (temperature-programmed desorption NOx) as reliable method to estimate accessible surface complex oxides. The uptake by was found be 5.8 ± 0.2 μmol/m2. On tungstated zirconia samples, decreases linearly with W density up about 5 W/nm2, which is in excellent agreement literature data pseudo monolayer coverage...
On the basis of critical analysis NOx-TPD data obtained on WOx−ZrO2 samples [Law, H. Y.; Blanchard, J.; Carrier, X.; Thomas, C. J. Phys. Chem. C2010, 114, 9731], this work provides convincing arguments for first time upon which calculation W surface density should be done by correcting specific area content as WO3, rather than straightforward manner used in most studies reported to date. The use particular method allows reconciling some literature data, which, at sight, seem incoherent....