A5034707064- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- nanoparticles nucleation surface interactions
- Advanced Chemical Physics Studies
- Catalysis and Hydrodesulfurization Studies
- Advanced Materials Characterization Techniques
- Catalysts for Methane Reforming
- Electron and X-Ray Spectroscopy Techniques
- Advanced ceramic materials synthesis
- Ion-surface interactions and analysis
- Laser-Ablation Synthesis of Nanoparticles
- Semiconductor materials and devices
- Advanced Electron Microscopy Techniques and Applications
- Machine Learning in Materials Science
- Nanomaterials for catalytic reactions
- Diamond and Carbon-based Materials Research
- Laser-induced spectroscopy and plasma
- Electrocatalysts for Energy Conversion
- Metal and Thin Film Mechanics
- Electronic and Structural Properties of Oxides
- Advancements in Solid Oxide Fuel Cells
- Force Microscopy Techniques and Applications
- Advanced Polymer Synthesis and Characterization
- Copper Interconnects and Reliability
- Block Copolymer Self-Assembly
Institut de Recherches sur la Catalyse et l'Environnement de Lyon
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Claude Bernard Lyon 1
2015-2024
National Research Tomsk State University
2015-2023
Forum Réfugiés - Cosi
2002-2020
École Normale Supérieure de Lyon
2008
Laboratoire de Chimie
2008
Laboratoire de Spectrométrie Ionique et Moléculaire
2000
Catalyse
2000
Boreskov Institute of Catalysis
1998
Abstract A dynamic structural behavior of Pt nanoparticles on the ceria surface under reducing/oxidizing conditions was found at moderate temperatures (<500 °C) and exploited to enhance catalytic activity Pt/CeO 2 ‐based exhaust gas catalysts. Redispersion platinum in an oxidizing atmosphere already occurred 400 °C. protocol with reducing pulses 250–400 °C applied a subsequent step for controlled Pt‐particle formation. Operando X‐ray absorption spectroscopy unraveled different extent...
Bimetallic Ni-Cu/SiO2 catalysts with different Cu loading (2–5 wt%) were developed for liquid phase selective hydrogenation of furfural to furfuryl alcohol. Among these, bimetallic 2%Ni-X%Cu/SiO2 (X = 2, 5) exhibited better catalytic performances than monometallic 2%Ni/SiO2 and 2%Cu/SiO2. Moreover, the 2%Ni-5%Cu/SiO2 catalyst showed best performance 94% conversion 64% alcohol selectivity. The synergetic effect NiCu alloy particles that are present on change adsorption configuration surface...
Low-temperature redispersion leads to an intermediate Pt monolayer arrangement, very active for CO oxidation.
Using angle-resolved photoemission spectroscopy, we show direct evidence for charge transfer between adsorbed molecules and metal substrates, i.e., chemisorption of CO on Pt(111) Pt–Sn/Pt(111) 2 × surfaces. The observed band structures a unique signature as atoms are adsorbed, revealing the roles specific orbital characters participating in process. As coverage increases, degree Pt shows clear difference to that Pt–Sn. With comparison density functional theory calculation results, distinct...
We study PdPt bimetallic clusters in both free and supported phases. These have been produced with a laser vaporization source. Free directly by the source are studied time of flight mass spectrometry photofragmentation technique. observed sequential evaporation Pd atoms mixed consistent palladium segregation process. This tendency has also on particles from which structure composition determined high resolution transmission electron microscopy energy dispersive x-ray analysis. A main result...
Supported Au and Ni clusters as well bimetallic AuNi have been produced by laser vaporization of both pure bulk metals alloy. Transmission electron microscopy (TEM) energy dispersive X-ray spectroscopy (EDS) experiments show that they a narrow distribution size centered around 2.5 nm the same composition vaporized Au0.5Ni0.5 photoemission (XPS) has used to measure core level binding shifts 4f7/2 Ni2p3/2. The observed in system combined effects alloying surface local order relation with...
Flame spray-synthesized Pt/TiO2 and PtCo/TiO2 catalysts with 0.7 wt% Pt 0–0.4 Co were studied in the hydrogenation of furfural to furfuryl alcohol (FA) at 50 °C 2 MPa H2. Particle formation under high temperature flame facilitated dispersion Pt-TiOx interface sites, which beneficial for conversion FA. Modifying accelerated rutile phase TiO2 formation, strongly diminished activity on (FSP)-PtCo/TiO2. On other hand, (I)-PtCo/TiO2 prepared by conventional impregnation, anatase was preserved (>...
Ni/YSZ is a benchmark material for solid oxide fuel cells (SOFCs) but suffers from both Ni agglomeration and carbon deposition when hydrocarbons are used as fuels. Sol–gel-prepared catalysts offer superior activities.
Abstract A dynamic structural behavior of Pt nanoparticles on the ceria surface under reducing/oxidizing conditions was found at moderate temperatures (<500 °C) and exploited to enhance catalytic activity Pt/CeO 2 ‐based exhaust gas catalysts. Redispersion platinum in an oxidizing atmosphere already occurred 400 °C. protocol with reducing pulses 250–400 °C applied a subsequent step for controlled Pt‐particle formation. Operando X‐ray absorption spectroscopy unraveled different extent...