A5029724895- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advanced NMR Techniques and Applications
- Solid-state spectroscopy and crystallography
- Catalysis for Biomass Conversion
- CO2 Reduction Techniques and Catalysts
- Zeolite Catalysis and Synthesis
- Catalysis and Hydrodesulfurization Studies
- MXene and MAX Phase Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- NMR spectroscopy and applications
- Chemical Synthesis and Characterization
- 2D Materials and Applications
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
- Advancements in Solid Oxide Fuel Cells
- Advancements in Battery Materials
- Advanced Condensed Matter Physics
- Chemical and Physical Properties in Aqueous Solutions
Université de Poitiers
2015-2024
Institut de Chimie des Milieux et des Matériaux de Poitiers
2014-2024
Centre National de la Recherche Scientifique
2014-2024
International Council on Mining and Metals
2020
Catalyse
2012
Institut Lavoisier de Versailles
2002-2010
Conditions Extrêmes et Matériaux Haute Température et Irradiation
2006
Institut de minéralogie, de physique des matériaux et de cosmochimie
2005
National High Magnetic Field Laboratory
2005
University of Aveiro
2001-2004
With the aim of obtaining a highly stable and active catalyst for oxygen evolution reaction (OER), core–shell-like IrO2@RuO2 material was synthesized by using surface modification/precipitation method in ethanol medium. The comparison this with pure RuO2 IrO2 showed that obtained mixed oxide displayed highest amount sites as well good accessibility water. Moreover, shown to be toward repetitive redox cycling. Polarization curves three catalysts most OER due large number high sites. These...
In this work, carbon supported nickel based nanoparticles were prepared by impregnation method and used as anode electrocatalysts for the glycerol conversion. These metallic powders mixed with a suitable amount of Nafion/water solution to make catalytic inks which then deposited onto surface Toray conductive substrate. Long-term electrolyses carried out in alkaline medium chronoamperometry experiments. Analysis oxidation products was performed ion-exclusion liquid chromatography separates...
Glycerol electrooxidation reaction has been investigated by electrochemical, spectroelectrochemical, and chromatographic methods on palladium–nickel palladium–silver nanoparticules supported carbon Vulcan XC 72R. These materials, prepared the so-called "Bromide Anion Exchange" method, exhibited high activity toward glycerol in alkaline medium showing furthermore an important shift of onset potential low values. Electrolysis coupled with high-performance liquid chromatography (HPLC) situ...
Abstract Trimetallic Ru‐, Ir‐, and Ce‐oxide materials were synthesized by using a hydrolysis method in ethanol medium characterized to obtain information on their crystallographic structure, morphology, chemical composition. Voltammetric measurements allowed us evaluate the properties of these catalysts through determination capacitance, active site number, accessibility. The effect cerium oxygen evolution reaction (OER) was also evaluated electrochemically catalytic layer stability measured...
Abstract The development of reliable electrolyzers is closely related to the a cost‐effective highly active and stable electrocatalysts for oxygen evolution reaction (OER). Herein, simple method used synthesize non‐noble metal‐based electrocatalyst OER by synergistically coupling catalytically cobalt layered double hydroxide (Co‐LDH) with electrically conducting 2D transition metal carbide, Ti 3 C 2 T x MXene. synergy between these two bidimensional materials (Co‐LDH ), evidenced electron...
We show for the first time that it is possible to acquire high-resolution heteronuclear NMR correlation experiments in solid state between second-order-broadened half integer quadrupolar nuclei (i.e., 27Al and 17O) using scalar J-coupling. The sensitivity of experiment dramatically improved at high fields (gain proportional fourth power principal field) with a combination signal enhancement techniques. This turns challenging into real tool. apply this characterize calcium aluminate glass...
This study focuses on clarifying the strong interaction existing between extended graphitic domains of ordered carbonaceous materials such as multiwalled carbon nanotubes and platinum nanoparticles. results from heterogeneous nucleation nanoparticles onto support. The metal clusters are chemically synthesized by using carbonyl route. Two different supports used namely, homemade nanotubes, MWCNT-m, classical Vulcan XC-72. Physicochemical properties these described Raman spectroscopy, X-ray...
We report a convenient and straightforward thermal pre-treatment to improve the physicochemical properties of carbon-based substrates boost catalytic activity platinum nanoparticles.
The aim of this work was to perform a systematic study the parameters that can influence composition, morphology, and catalytic activity PtSn/C nanoparticles compare two different methods nanocatalyst preparation, namely microwave-assisted heating (MW) thermal decomposition polymeric precursors (DPP). An investigation effects reducing stabilizing agents on morphology Pt75Sn25/C catalysts prepared by undertaken for optimization purposes. effect short-chain alcohols such as ethanol, ethylene...
Abstract Foresee advanced and innovative strategies is a key approach constitutes cornerstone for accessing clean, affordable, reliable energy to satisfy the world's increasing prosperity economic growth. To this end, hydrogen technologies parade as promising sustainable solutions looming crisis at either small or large industrial scale, which will enable reduce significantly our dependence on conventional sources based fossil fuels without atmospheric CO 2 levels. Water electrolysis with...
Mesoporous nickel cobaltites synthesized using a nanocasting technique show high OER activity after surface modifications induced by potential cycling.
Understanding the fundamental relationship between size and structure of electrode materials is essential to design catalysts enhance their activity. Therefore, spherical gold nanoparticles (GNSs) with a mean diameter from 4 15 nm were synthesized. UV/Vis spectroscopy, transmission electron microscopy, under-potential deposition lead (UPDPb ) used determine morphology, size, surface crystallographic GNSs. The UPDPb revealed that facets are affected by growth process. catalytic properties...
Abstract The selective electrochemical conversion of highly functionalized organic molecules into electricity, heat, and added‐value chemicals for fine chemistry requires the development selective, durable, low‐cost catalysts. Here, we propose an approach to make catalysts that can convert carbohydrates selectively produce electrical power recoverable heat. A 100 % Faradaic yield was achieved oxidation anomeric carbon glucose its related (C1‐position) without any function protection....
The synthesis and structural characterization of the first examples microporous europium(III) terbium(III) silicates (Na(4)K(2)X(2)Si(16)O(38) x 10H(2)O, X = Eu, Tb) are reported. structure these solids was solved by powder X-ray diffraction ab initio (direct) methods further characterized chemical analysis (EDS), thermogravimetric (TGA), scanning electron microscopy (SEM), (23)Na (29)Si magic-angle spinning (MAS) NMR, luminescence spectroscopy. Both materials display interesting...
Two gallium carboxylates of MOF-type have been hydrothermally synthesized (210 °C) by using 1,2,4,5-benzenetetracarboxylate (Ga4(OH)8[C10O8H2]·5−5.6H2O or MIL-120) 1,2,4-benzenetricarboxylate (Ga2(OH)4[C9O6H4] MIL-124) as linkers. The structures both compounds solved from XRD analysis, revealed two independent crystallographic sites for the atoms, which are connected to each other through μ2-hydroxo edge, generating zigzag chains with a cis−trans mode. inorganic ribbons linked via all...