Séminaire
2024
séminaire vendredi 29 novembre 2024, 10h Amphithéâtre Durand
Fabio Ribeiro Professor Purdue University USA
Heterogeneous Catalysis: Enabling the Breakthroughs for a Sustainable Energy Transition
séminaire jeudi 21 novembre 2024, 11h salle 101 UFR
Miguel Comesana Hermo Chargé de recherche ITODYS Université Paris Cité
Plasmonic Photocatalysis: From Fundamental Aspects to Applications
Plasmonic photocatalysis is a dynamic field of research dedicated to the activation of chemical transformations thanks to the unique optoelectronic features of plasmonic nanomaterials. More precisely, when a metallic nanoparticle is irradiated, its conduction electrons oscillate collectively, generating the so-called localized surface plasmon resonances. Such light-matter interaction leads to the generation of highly energetic charge carriers and the confinement of the electromagnetic field at the surface of the object. When applied to drive photochemical transformations, these physical phenomena can produce new reactivities compared to conventional heterogeneous photocatalysts, notably providing unprecedented control over efficiency and chemical selectivity.
In this seminar we will discuss on the development of novel plasmonic materials, including colloidal hybrids and micrometric assemblies, and their implementation to catalyze organic transformations, the inorganic growth of nanostructures and the activation of small molecules for the generation of renewable fuels. Through different examples we will also demonstrate how plasmonic photocatalysis can pave the way to completely new functionalities such as bioorthogonal or asymmetric reactivities.
séminaire jeudi 26 septembre
Maco Altomare Professor University of Twente, Netherlands
Solid-state dewetting made useful: Model nanoparticle electrodes for electrocatalysis
Supported metal nanoparticles are of wide scientific and technological interest. When coupled with conductive or semiconductor surfaces, they find application as catalysts in electro- and photo-catalytic reactions, or in plasmonics and sensing. Oxide supported-metal nanoparticles are at the core of most thermo-catalytic processes.
A straightforward and versatile, yet underexplored, way to produce supported metal particles is “solid-state dewetting” (hereafter, simply dewetting) [1], that is, the heat-induced agglomeration of thin metal films into defined nanoparticles well-attached onto a support. This occurs via surface diffusion of metal atoms at elevated temperatures, due to the metastable nature and high surface-to-volume ratio of thin metal films. The driving force is the minimization of the surface energy of the metal film and substrate, and of the metal/substrate interface.
Noteworthy, dewetting of thin films has long plagued makers of integrated circuits. It has also limited the reliability of other microdevices, especially when high-temperature operation is required, and much research has been carried out to characterize and suppress dewetting in all these systems [1]. In our research, we take a different perspective: we deliberately induce dewetting under controlled conditions as a design concept towards model nanoparticle platforms for electro- and photo-catalysis.
In my seminar, I will discuss the use of solid-state dewetting to control key properties of catalyst nanoparticles (size, composition, and structure) formed on electrodes and photocatalytic layers [2]. I will show how to enable nanoscale effects such as metal-support interactions to boost the catalyst performance in electrocatalytic reactions (e.g., hydrogen evolution) [3], and how tuning the catalyst composition affects catalyst stability and activity in photocatalysis [4,5]. In addition, I will show how dewetting can be steered to produce model nanocatalysts composed of ensembles of spatially-separated and uniformly-oriented metal nanoparticles with defined exposed facets [6].
[1] C.V. Thompson, Annu. Rev. Mater. Res. 2012, 42, 399
[2] M. Altomare et al., Chem. Sci. 2016, 7, 6865
[3] S. Harsha et al., Adv. Funct. Mater. 2024, 2403628
[4] D. Spanu et al., ACS Catal. 2020, 10, 15, 8293
[5] D. Spanu et al., ACS Catal. 2018, 8, 6, 5298
[6] R.K. Sharma et al., 2023 Meet. Abstr. MA2023-02 2059
2024
séminaire jeudi 12 juillet 2024
Eleni A. Kyriakidou Associate Professor University at Buffalo
High Silica Small Pore Zeolites for Low Temperature CH4 Oxidation Applications
séminaire jeudi 2 mai 2024
Adrien COUET Professor University of Wisconsin Madison
Molten Salt Corrosion Kinetics Prediction and Mechanism Interpretation Enabled by Integrated High-Throughput Experimental and Modeling Tools
séminaire jeudi 25 avril 2024
Benjamin Carbonnier Professeur des Universités ICMPE
Porous polymeric materials with controlled pore structure and surface functionality: Design and application
séminaire mardi 26 mars 2024
Joshua Owen Maître de conférences University of Leeds
Corrosion challenges in the transition to sustainable energy
séminaire mercredi 24 janvier 2024
Bonjun Ku Doctorant Université de Chungnam Corée
Catalytic study of dryreforming of methanereaction and water gasshift reaction
Siranuysh Badalyan Doctorant Université de Chungnam Corée
Solid Fe(II) catalystsfor electrochemicalNORR application
2023
séminaire lundi 27 mars 2023
Jaysen Nelayah maître de conférence à l'université de Paris-Cité
Nanoalliages multi-composants à haute entropie : synthèse, propriétés structurales et potentialités pour la catalyse hétérogène
séminaire jeudi 16 février 2023
George Z. Kyzas Professeur International Hellenic University
Graphene materials in wastewater treatment
séminaire lundi 13 février 2023
Sandra Casale et Ferdaous Ben Romdhane ingénieure d'étude et ingénieure de recherche
Principe et applications de la microscopie électronique en transmission pour l'étude des nanomatériaux
séminaire lundi 6 février 2023
Roger Guérin délégué à l'intégrité scientifique Sorbonne université
L'intégrité scientifique face à la faked science : des généralités au fonctionnement à Sorbonne Université
séminaire lundi 23 janvier 2023
Marjorie Olivier Professeure Université de Mons
Hydrotalcite modified coatings for corrosion protection of steel and Zn sacrificial layers
séminaire lundi 23 janvier 2023
Rodolfo Zanella Universidad Nacional Autónoma de Mexico et directeur du Centre d’études mexicaines
Catalyseurs mono et bimétalliques pour la photolyse de l’eau
séminaire mercredi 18 Janvier 2023
Dr Frédéric Meunier Directeur de Recherche au CNRS,IRCELYON UMR5256,
Quantitative operando IR studies involving CO and CO2: matching surface species with reaction products
2020
- Mardi 3 mars
Dr MORI Kohsuke (Associate Professor, Osaka University, Japon) :
"Nanocatalyst Engineering for Hydrogen Storage and Delivery Based on Formic Acid"
Dr KUWAHARA Yasutaka (Associate Professor, Osaka University, Japon) :
"Design of Hollow Nanostructured Catalysts Encapsulating Metal Nanoparticles and Aminopolymers for Hydrogenation Reactions"
- Lundi 9 mars
Jean-Michel NEGRONI (Géologue, société IMERYS)
"Présentation des activités industrielles du groupe IMERYS, leader mondial de spécialités minérales pour l’industrie"
- Lundi 16 mars
Dr Hervé TOULHOAT (Cherch. Bénévole LRS, ex-Dir. Adjoint IFP Energies Nouvelles) :
"Morphologie d’équilibre et spéciation de surface de nanoparticules: du calcul DFT à la caractérisation expérimentale"
- Lundi 23 mars
Dr Antonio AGUILAR-TAPIA (CNRS, Institut NEEL, Grenoble)
"Reaction cells for operando XAS characterization of catalysts"
2019
Lundi 21 janvier 2019
Vincent PELLAS
Biocapteur plasmonique à base de nanoparticules coeur-coquille Au@SiO2
Directrices de thèse :
- Souhir Boujday
- Michèle Salmain, IPCM
Avec la participation de Juliette Blanchard
Ilhem JAABAR
Étude de l'évolution os/cartilage au cours de l'arthrose par microscopie à force atomique
Directeurs de thèse :
- Jessem Landoulsi
- Houard, Polytech Sorbonne
Lise BEDOIN
Émergence de biopolymères de complexité contrôlée dans les scénarios d’Origine de la Vie
- Jean-François Lambert
Lundi 28 janvier 2019
1/Yacine MAZOUZI
Compréhension de l'interface organique/inorganique lors de l'assemblage de molécules fonctionnelles sur des surfaces planes pour des applications biologiques
Directrice de thèse :
- Souhir Boujday
Co-Encadrement : Juliette Blanchard, Vincent Humblot & Yannick Millot
2/Mathieu BALAS
Formation de carbonates cycliques à partir d'alcènes et de CO2 par voie catalytique "one-pot" en présence d'oxydants propres
Directeur de thèse :
- Franck Launay
3/François PAYAN
Elaboration par voie plasma hors équilibre de nouveaux matériaux oxydes à base de magnésium : propriétés basiques et réactivité catalytique en transestérification
Directrice de thèse :
- Hélène Pernot
Directeur de thèse :
- J-F. Hochepied
lundi 11 février 2019
Catalyse hybride pour activer le CO2 par combinaison de complexes moléculaires de Fer ou de Cobalt et de matériaux carbonés.
Marc Robert
Laboratoire Electrochimie Moléculaire - UMR CNRS 7591, Université Paris Diderot, Sorbonne Paris Cité
Lundi 4 mars 2019
Reaction mechanisms on inorganic surfaces : from isolated metal atom on surfaces for unusual N2 splitting and catalytic biomass conversion to growth of atomically thin layers of 2D materials.
Alessandra Quadrelli est chargée de recherche au CNRS au C2P2 Chemistry, Catalysis, Polymers and Processes (UMR 5265)
Jeudi 4 avril 2019
Using neutron spectroscopy to assess heterogeneous catalysts
Ahmed Naitabdi
Sorbonne Université, Laboratoire de Chimie Physique Matière et Rayonnement
"In situ investigation of chemical reactions on metal-oxide model nanocatalysts by near-ambient pressure XPS"
Vendredi 24 mai 2019
Professor S. Ted Oyama
University of Tokyo
Department of chemical system engineering
“Kinetic/spectroscopic technique (Analysis of Coverage Transients - ACT) to study model HDN and HDS reactions.”
Vendredi 14 juin 2019
John Regalbuto is Professor of Chemical Engineering and CeEE Endowed Chair in Renewable Fuels in the College of Engineering and Computing at the University of South Carolina.
Lundi 14 octobre 2019
Dr. Shuyun CHNG
«Nanomaterial synthesis, coating formulation and coating process development for applications such as anti-microbial, smart windows, anti-scratch»