A5044053636- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Catalytic Processes in Materials Science
- Catalysis for Biomass Conversion
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- CO2 Reduction Techniques and Catalysts
- Advanced Chemical Sensor Technologies
- Chemical and Physical Properties in Aqueous Solutions
- Enzyme Catalysis and Immobilization
- Electrospun Nanofibers in Biomedical Applications
- Ionic liquids properties and applications
- Oxidative Organic Chemistry Reactions
- Biochemical Analysis and Sensing Techniques
- Microfluidic and Capillary Electrophoresis Applications
- Neuroscience and Neural Engineering
- Microbial Fuel Cells and Bioremediation
- Carbohydrate Chemistry and Synthesis
- Advanced Nanomaterials in Catalysis
- Chemical Synthesis and Reactions
Université de Poitiers
2013-2024
Institut de Chimie des Milieux et des Matériaux de Poitiers
2013-2024
Centre National de la Recherche Scientifique
2012-2024
Laboratoire de Chimie Organique
2005-2016
Fritz Haber Institute of the Max Planck Society
2007
Carbon supported Pt−Au catalysts with different bimetallic compositions were prepared by water in oil (w/o) microemulsion. Vulcan XC-72 was added during the synthesis of particles order to obtain their good dispersion and a mean particle size distribution 5.02 ± 0.56 nm. Structural characterization performed using XRD at wide angles (WAXS), which showed that exhibited alloy properties. Electrochemical allowed estimate surface composition alloys, close bulk material Pt20Au80. This catalyst...
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...
The oxygen reduction reaction (ORR) is the oldest studied and most challenging of electrochemical reactions. Due to its sluggish kinetics, ORR became major contemporary technological hurdle for electrochemists, as it hampers commercialization fuel cell (FC) technologies. Downsizing metal particles nanoscale introduces unexpected fundamental modifications compared corresponding bulk state. To address these issues, various synthetic routes have been developed in order provide more versatile...
The recent developments in biomass-derivative fuelled electrochemical converters for electricity or hydrogen production together with chemical electrosynthesis have been reviewed.
Carbon supported Au–Pt catalysts with different bimetallic compositions were prepared by water-in-oil (w/o) micro-emulsions. Vulcan XC-72R was added during the synthesis of particles in order to obtain good dispersion. Structural characterization performed using XRD (X-ray diffraction) at wide angles, WAXS (wide-angle X-ray scattering) which showed that Pt–Au exhibited alloy properties samples high gold-content, and a segregation effect for those low gold-content. Electrochemical allowed...
We report a convenient and straightforward thermal pre-treatment to improve the physicochemical properties of carbon-based substrates boost catalytic activity platinum nanoparticles.
The synthesis of shape and size-controlled free gold nanoparticles (AuNPs) was achieved by wet chemical methods. UV–vis spectroscopy measurements transmission electron microscopy characterizations confirmed the fine distribution in size AuNPs. zeta potential permitted evaluation stability AuNPs suspension. For first time, dependence on electrocatalytic activity these NPs is thoroughly investigated. underpotential deposition (UPD) lead reveals that their crystallographic facets are affected...
Abstract An “abiotic” biofuel cell composed of catalytic electrodes modified with inorganic nanostructured species was used to activate a pacemaker. The nanoparticles various compositions, Au x Pt y , deposited on carbon black (CB) were prepared and extensively characterized select the selectivity for glucose oxidation oxygen reduction. Then two kinds 3D‐electrode materials different morphology, buckypaper nanotubes (ca. 50 nm diameter) paper made fibers 7 µm diameter), in combination...
We report decisive advances in costly-robust Pd-based ORR nanocatalysts preparation, which enlighten us on the crucial role of nanowire oxides.
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 advances in material science have led to the development of novel and various materials as nanoparticles or thin films. Underpotential deposition (upd) transition metals appears be a very sensitive method for probing surfaces noble metals, which is parameter that has an important effect on activity heterogeneous catalysis. surface characterization tool permits researchers precisely determine crystallographic orientations real area surfaces. Among all work dealing with upd, this review...
Bromide anion exchange, a method that consists of the introduction KBr before reduction precursor salts by sodium borohydride, has enabled synthesis AuPt nanoparticles. Physicochemical techniques have been used to analyze these carbon Vulcan-modified catalytic powders exhibit face-centered cubic structures. The bimetallic materials were mainly composed solid solutions. These utilized in preparation electrocatalysts toward oxidation monoxide and glucose. In situ reflectance infrared...
The nature of the reduction agent changes drastically palladium nanomaterials chemical stability, which subsequently alters earnestly their catalytic performances.