A5011167912- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Graphene research and applications
- Electrocatalysts for Energy Conversion
- Carbon Nanotubes in Composites
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Industrial Gas Emission Control
- Supercapacitor Materials and Fabrication
- Fuel Cells and Related Materials
- Zeolite Catalysis and Synthesis
- Catalysis for Biomass Conversion
- Advancements in Battery Materials
- Nanomaterials for catalytic reactions
- Mesoporous Materials and Catalysis
- Advanced battery technologies research
- CO2 Reduction Techniques and Catalysts
- Diamond and Carbon-based Materials Research
- Gas Sensing Nanomaterials and Sensors
- Covalent Organic Framework Applications
- Advanced Photocatalysis Techniques
- Carbon dioxide utilization in catalysis
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Graphene and Nanomaterials Applications
Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé
2016-2025
Université de Strasbourg
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut de Chimie
2013-2024
Dalian National Laboratory for Clean Energy
2024
Dalian Institute of Chemical Physics
2024
Institute for the Chemistry of OrganoMetallic Compounds
2022
National Interuniversity Consortium of Materials Science and Technology
2022
Département Santé des Plantes et Environnement
2014-2017
Laboratoire des Matériaux Surfaces et Procédés pour la Catalyse
2004-2013
The first electrical conductivity measurements of monoatomic carbon chains are reported in this study. were obtained by unraveling atoms from graphene ribbons while an current flowed through the ribbon and, successively, chain. formation was accompanied a characteristic drop conductivity. much lower than previously predicted for ideal chains. First-principles calculations using both density functional and many-body perturbation theory show that strain determines decisive way. Indeed, always...
This perspective illustrates the electromagnetic induction heating technology for a rational heat control in catalytic heterogeneous processes. It mainly focuses on remarkable advantages of this approach terms process intensification, energy efficiency, reactor setup simplification, and safety issues coming from use radio frequency heated susceptors/catalysts fixed-bed reactors under flow operational conditions. is real enabling that allows to go beyond bounds, reducing inefficient transfer...
Single-atom catalysts (SACs) have shown superior activity and/or selectivity for many energy- and environment-related reactions, but their stability at high site density under reducing atmosphere remains unresolved. Herein, we elucidate the intrinsic driving force of a Pd single atom with (up to 5 wt %) atmosphere, its unique catalytic performance hydrogenation reactions. In situ experiments calculations reveal that atoms tend migrate into surface vacancy-enriched MoC during carburization...
Few-layer graphene (FLG) sheets with sizes exceeding several micrometers have been synthesized by exfoliation of expanded graphite in aqueous solution ammonia under microwave irradiation, an overall yield approaching 8 wt.%. Transmission electron microscopy (in bright-field and dark-field modes) together diffraction patterns atomic force confirmed that this material consisted mostly mono-, bi- or few-layer (less than ten layers). The high degree surface reduction was X-ray photoelectron...
We report on the N-decoration of multiwalled carbon nanotubes (MWCNTs) via chemical functionalization under mild reaction conditions. The introduction tailored pyridinic functionalities as N-containing edge-type group mimics generates effective catalysts for oxygen reduction (ORR) in an alkaline environment. adopted methodology lists a number remarkable technical advantages, among which is easy tuning electronic properties groups. latter aspect further increases level complexity...
Nanocomposites combining multiple functionalities in one single nano-object hold great promise for biomedical applications. In this work, carbon nanotubes (CNTs) were filled with ferrite nanoparticles (NPs) to develop the magnetic manipulation of and their theranostic The challenges both filling CNTs a high amount NPs functionalization form biocompatible water suspensions. We propose here process using as nanoreactors high-yield situ growth into inner cavity. At first, formed inside by...
This review provides an overview of the use foam-structured SiC as a porous support platform in some typical catalytic processes both for gas-phase and liquid-phase reactions, such H<sub>2</sub>S selective oxidation, Friedel–Crafts benzoylation Fischer–Tropsch synthesis.
The rational designed defect enriched N-doped nanocarbons present superior activity and stability for H<sub>2</sub>S selective oxidation.
Introducing promoters on cobalt-based catalysts for Fischer–Tropsch synthesis (FTS) have been found efficient adjusting their performance in converting syngas into long-chain hydrocarbons. Details of the promotion mechanism established atomic precise identification upon active sites structure as well electronic status is seldomly reported yet. In present work, we report direct valence and coordination configuration ZrO2 promoter additive over FTS under a wide range Zr/Co molar ratios from...
Notable progress has been made for low Pt-based and Fe–N–C electrocatalysts proton exchange membrane fuel cell (PEMFC) applications. In particular, the research development of cost-effective Fe–N–C's have witnessed significant improvements in recent years due to need an alternative candidate scare expensive platinum. Numerous studies explored design optimization generally make simple performance comparisons with commercial Pt/C catalysts on basis rotating disk electrode (RDE) and/or assembly...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomerization of n-Heptane on an Oxygen-Modified Molybdenum Carbide CatalystEdd A. Blekkan, Cuong Pham-Huu, Marc J. Ledoux, and Jean GuilleCite this: Ind. Eng. Chem. Res. 1994, 33, 7, 1657–1664Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://pubs.acs.org/doi/10.1021/ie00031a003https://doi.org/10.1021/ie00031a003research-articleACS PublicationsRequest reuse permissionsArticle...
The macroscopic shaping of carbon nanostructure materials with tunable porosity, morphologies, and functions, such as nanotubes (CNT) or nanofibers (CNF), into integrated structures is great interest, it allows the development novel nanosystems high performances in filter applications catalysis. In present work, we report on a low temperature chemical fusion (LTCF) method to synthesize self-macronized foam (CNT-foam) controlled size shape by using CNT skeleton, dextrose source, citric acid...
We present here the application of energy-filtered transmission electron microscopy (EFTEM) in tomographic mode to determine precise 3D distribution nitrogen within nitrogen-doped carbon nanotubes (N-CNTs). Several tilt series images were acquired on K ionization edges and a multiwalled N-CNT containing high amount nitrogen. Two 2D maps then calculated from corresponding by using proper extraction procedure chemical signals. Applying iterative reconstruction algorithms provided two spatially...
Activity and selectivity are key features at the basis of an efficient catalytic system for promoting steam‐ oxygen‐free dehydrogenation (DDH) ethylbenzene to styrene. The catalyst stability under severe reaction conditions, reduction leaching its active sites, their resistance deactivation phenomena on stream other fundamental aspects keep in mind while synthesizing new materials process. Although recent use single‐phase (doped or undoped) carbon nanomaterials has significantly contributed...
A challenging task of modern and sustainable catalysis is to rethink key processes at the heart renewable energy technology in light metal-free catalytic architectures designed fabricated from cheap easily accessible building blocks. This contribution describes synthesis highly N doped, carbon nanotube (CNT)-netting composites raw materials. With physical mixtures CNTs food-grade components as starting materials, their thermal treatment generates foamy, N-doped carbon-based architectures....
In this review we focus on recent developments in the field of 3D imaging at nanoscale, when applied to nanomaterials and nanostructures. We demonstrate, by highlighting examples, that progress use electron microscopy techniques based tomography allows one fill gap between development new materials their structures characterization. A special emphasis is put two approaches: quantitative analytical tomography. The first approach gives access exploration specific parameters within nano-objects...
This paper describes the exohedral N-decoration of multiwalled carbon nanotubes (MWCNTs) with NH-aziridine groups via [2 + 1] cycloaddition a tert-butyl-oxycarbonyl nitrene followed by controlled thermal decomposition cyclization product. The chemical grafting N-containing deeply modifies properties starting MWCNTs, generating new surface microenvironments specific base (Brønsted) and electronic properties. Both these features translate into highly versatile single-phase heterogeneous...
Selective oxidation of H2S to sulfur is an efficient process for industrial applications and environmental requirement reduce the residual in Claus technology ultralow content (<0.1 ppm) before releasing off-gas into atmosphere. Recently, numerous research studies have been devoted development highly active, selective stable catalysts such fields application. However, there usually a trade-off between conversion selectivity S due inevitable overoxidation or SO2 on active catalysts. In this...