A5021022410- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- Molecular Junctions and Nanostructures
- Ammonia Synthesis and Nitrogen Reduction
- Electrodeposition and Electroless Coatings
- Surface and Thin Film Phenomena
- Advancements in Solid Oxide Fuel Cells
- Machine Learning in Materials Science
- Advanced battery technologies research
- Corrosion Behavior and Inhibition
- Hydrogen Storage and Materials
- Electron and X-Ray Spectroscopy Techniques
- Membrane-based Ion Separation Techniques
- Electrochemical sensors and biosensors
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Iron oxide chemistry and applications
- Advanced Battery Technologies Research
- Non-Destructive Testing Techniques
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Theoretical and Computational Physics
- Karst Systems and Hydrogeology
Institut polytechnique de Grenoble
2015-2025
Centre National de la Recherche Scientifique
2015-2025
Université Grenoble Alpes
2014-2025
Université Savoie Mont Blanc
2019-2025
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces
2014-2024
Laboratoire d'Electrochimie Moléculaire
2021-2023
Université Joseph Fourier
2008-2014
Université de Poitiers
2002-2008
Laboratoire de Chimie Organique
2003-2007
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...
Gaining fundamental insights into the formation and stability of surface oxides on iridium (Ir) surfaces is pivotal to oxygen evolution reaction (OER) electrocatalysis. Herein, we examined potential-dependent structural chemical changes occurring planar Ir(111), Ir(210), nanofaceted Ir(210) single-crystal using electrochemistry, scanning probe microscopy, X-ray photoelectron spectroscopy, inductively coupled plasma mass spectrometry. We show that, after polarization in OER conditions, Ir...
The theoretical design of effective metal electrocatalysts for energy conversion and storage devices relies greatly on supposed unilateral effects catalysts structure electrocatalyzed reactions. Here, by using high-energy X-ray diffraction from the new Extremely Brilliant Source European Synchrotron Radiation Facility (ESRF-EBS) device-relevant Pd Pt nanocatalysts during cyclic voltammetry experiments in liquid electrolytes, we reveal near ubiquitous feedback various electrochemical...
An original approach to characterize electrochemical interfaces at the atomic level, a challenging topic toward understanding of reactivity, is reported. We employed in situ surface resonant X-ray diffraction experiments combined with their simulation using first-principle density functional theory calculations and were thus able determine molecular electronic structures partially ionic layer facing electrode surface, as well charge distribution metal layers. Pt(111) an acidic medium applied...
In this work, we report an in situ surface X-ray diffraction study of the hydrogen electroinsertion a two-monolayer equivalent palladium electrodeposit on Pt(111). The role chloride deposition solution favoring layer-by-layer film growth is evidenced. Three Pd layers are necessary to describe deposit structure correctly, but third-layer occupancy quite low, equal about 0.22. As major result, resistance hydriding two atomic closest Pt interface observed, which linked strong effect Pt(111)...
Electrodeposition of the first Pd layers onto Pt(100) was investigated using cyclic voltammetry at a low scan rate (0.1 mV·s-1). Ultrathin films were characterized by in 0.1 M H2SO4 solution and with ex situ AFM (atomic force microscopy). For time, we evidenced underpotential character deposition two layers, two-step mechanism, each step corresponding to complete atomic layer. thicker deposits, especially above 10 monolayers as equivalent thickness, electrochemical characterization displays...
Catalytic activity of the Pt(111)/Os surface toward methanol electrooxidation was optimized by exploring a wide range Os coverage. Various methods analyses were used, including electroanalytical, STM, and XPS methods. The Pt(111) decorated with nanosized islands spontaneous deposition, coverage controlled changing exposure time to Os-containing electrolyte. structure deposits on characterized quantified in situ STM stripping voltammetry. We found that optimal for 0.7 +/- 0.1 ML, close 1.0...
Metallic hydrides represent a very interesting solution for hydrogen storage thanks to their capability absorb in reversible way. Light metallic alloys recently developed may need the use of films as protective barriers, and palladium nanofilms relevant example. In present study we analyze with situ surface X-ray diffraction structure about 20 monolayer thick Pd electrodeposited onto Pt(111) before after electro-insertion electro-desorption. The influence substrate on pseudomorphic character...
The comprehension of the mechanisms underlying charge distribution at electrochemical interface is a fundamental step in sight performance catalytic materials. Several techniques allow atomic structure metal surface to be characterized, while no experimental method enables obtain catalyst and electrolyte interfacial region. Combining ab initio calculations, we succeeded quantitatively describing archetypal system Pt(111) an acidic medium. In our approach, couple situ resonant X-ray...