A5048988230- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Mesoporous Materials and Catalysis
- Supercapacitor Materials and Fabrication
- Carbon Nanotubes in Composites
- Fuel Cells and Related Materials
- Diamond and Carbon-based Materials Research
- Aerogels and thermal insulation
- Surfactants and Colloidal Systems
- Conducting polymers and applications
- Graphene research and applications
- Polyoxometalates: Synthesis and Applications
- Metal and Thin Film Mechanics
- Electrochemical sensors and biosensors
- Graphene and Nanomaterials Applications
- Multiferroics and related materials
- Photochromic and Fluorescence Chemistry
- High Temperature Alloys and Creep
- Magnetic and transport properties of perovskites and related materials
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- Thermal properties of materials
- Silicone and Siloxane Chemistry
- High-Temperature Coating Behaviors
- Electrochemical Analysis and Applications
Université de Lorraine
2013-2024
Centre National de la Recherche Scientifique
2013-2024
Institut Jean Lamour
2020-2024
Laboratoire Lorrain de Chimie Moléculaire
2018-2020
Institut Jean Nicod
2016
Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes
2013
Abstract Single atoms and nanoclusters of Fe, Ni, Co, Cu, Mn are systematically designed embedded in a well‐defined C 1 N ‐type material that has internal cavities ≈0.6 nm based on four atoms. These serve as perfect anchoring points for the nucleation small different metal natures through creation metal‐nitrogen (TM‐N 4 ) bonds. After pyrolysis at 800 °C, TM@CN x structures obtained, where TM is transition < 1. Fe@CN Co@CN most promising oxygen reduction reaction hydrogen evolution...
Abstract Encapsulating Fe 3 C in carbon layers has emerged as an innovative strategy for protecting while preserving its high oxygen reduction activity. However, fundamental questions persist regarding the active sites of encapsulated due to restricted accessibility molecules metal sites. Herein, intrinsic electron transfer mechanisms nanoparticles N‐doped materials are unveiled electrocatalysis. The precision‐structured 1 N material is used synthesize carbons with C, significantly enhancing...
Hybrid materials consisting of a monoolein lipidic cubic phase (LCP) incorporating two types magnetic nanoparticles (NP) were designed as addressable drug delivery systems. The materials, prepared in the form gel, subsequently used macroscopic layer modifying an electrode and, after dispersion to nanoscale, magnetocubosomes. These LCPs characterized by small-angle X-ray scattering (SAXS), cross-polarized microscopy, measurements, and diagrams. dopants hydrophobic NPoleic hydrophilic...
Recently, the nanostructured nickel–cobalt bimetallic oxide (NiCo 2 O 4 ) material with high electrochemical activity has received intensive attention.
The effects of a para substituent, as the electron-donating -OCH3 and -OtBu groups electron-withdrawing -Br -F atoms, on azobenzene isomerization have been investigated in series imidazolium ionic liquids (BMIM PF6, BMIM BF4, Tf2N, EMIM BM2IM HMIM Tf2N). thermal cis-trans conversion tends to be improved presence pointed out by first-order rate constants measured at 25 °C. Both rotation inversion mechanisms occur highlighted typical V-shape Hammett plots, but only takes place Tf2N. possible...
Abstract This study examines the effect of pretreatment and doping to enhance ORR activity multiwalled carbon nanotubes (MWCNTs). Melamine thio-urea are chosen as precursors for mono co-doping, respectively. A series samples with pristine pretreated CNTs prepared characterized physicochemically by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) transmission electron microscopy (TEM) electrochemically cyclic voltammetry (CV) linear sweep (LSV). The obtained results show that...
Herein, we report the design of a supported biocatalyst by physisorption Mucor miehei lipase (Mm-L) onto SBA-15 followed addition supramolecular biosourced hydrogelator to reduce the...
The coexistence of single atoms and nanoparticles is shown to increase the oxygen reduction performance in Fe-N-C electrocatalysts, but mechanisms underlying this synergistic effect remain elusive. In study, model electrocatalysts with controlled ratios FeN4 sites Fe3C nanoclusters systematically designed synthesized. Experiments density functional theory (DFT) computations reveal that near modulate electron Fe single-atom microenvironment through an withdrawing effect. This substantially...
Combining the emulsion and cooperative templating mechanisms, self-standing macro-mesoporous SBA-15-Si(HIPE) monoliths (90–95% of porosity) have been synthesized for first time. Materials prepared from Pluronic (P123)/dodecane/water system in presence salt TEOS as silica scaffold precursor. As increasing ionic strength was shown to be ineffective toward obtaining monoliths, we induced a kosmotrope "order maker" effect within starting gel making use (NH4)2SO4 enhance polycondensation. Beyond...
Magneto-responsivity can be imprinted in hard mesoporous silica materials using soft colloidal templates formed by magnetic surfactants. The exhibit a low to high spin transition due geometrical constraints of the isolated iron ions grafted on walls.
Activation is commonly used to improve the surface and porosity of different kinds carbon nanomaterials: activated carbon, nanotubes, graphene, black. In this study, both physical chemical activations are applied graphene oxide by using CO2 KOH-based approaches, respectively. The structural properties prepared deeply characterized means scanning electron microscopy, Raman spectroscopy, Fourier transform infrared X-ray photoelectron spectrometry nitrogen adsorption. Temperature activation...