{"id":10976,"date":"2024-09-24T10:16:38","date_gmt":"2024-09-24T08:16:38","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=10976"},"modified":"2024-09-25T10:01:12","modified_gmt":"2024-09-25T08:01:12","slug":"interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\/","title":{"rendered":"Interfaces and nanoalloys: formation, dynamics and relevance in catalysis. &#8211; (Christophe Cop\u00e9ret \/ LPCNO \/ Seminar). &#8211; 30\/09\/2024"},"content":{"rendered":"<p><span style=\"font-size: 20px;\"><strong>S\u00e9minaire LPCNO<\/strong> <\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Christophe Cop\u00e9ret, <\/strong><\/span>ETH Zurich, CH<\/span><\/p>\n<p><span style=\"background-color: #cecece;\"><strong>Amphi GEI13, INSA, Build. 19, Room 13 (ground floor left)<\/strong><\/span><\/p>\n<p><span style=\"font-size: 20px;\"><strong>Abstract<\/strong> <\/span><br \/>\nMost large-scale industrial processes rely on heterogeneous catalysts. Among them, supported nanoparticles represent one of the largest classes, for which the desired catalytic performances (activity, selectivity and stability) often relate to specific combination of metals, additives (promoters\/poisons) and supports. The complexity of these multicomponent materials often relates to the use of conventional preparation methods in water, associated dissolution\/precipitation processes. They thus raise numerous questions on the role of each components, and in particular on the role of specific compositions, interfaces and alloying in driving catalytic properties.<\/p>\n<p>In this context, our group has developed synthetic methodologies to control the generation of active sites thanks to the concept of surface organometallic chemistry (SOMC). SOMC is anchored on molecular principles with the goal to understand the surface chemistry at a molecular level. It typically relies on controlling the density of functional groups like surface OH groups in oxide materials, grafting molecular precursor to generate isolated metal sites, following in many instances by a thermal treatment that removes the remaining ligands. This approach has been very successful in generating so-called single-site catalysts; it has also recently been shown to grow, in a controlled manner, nanoparticles with tailored compositions, small and nanoparticle size distribution, interfaces, and even alloying. Furthermore, these SOMC catalysts are specifically aimable to detailed characterization and operando spectroscopy, hence the possibility to derive structure-activity relationships.[1]<\/p>\n<p>This lecture focuses on showing how SOMC combined with state-of-the-art Operando spectroscopies, in particular based on X-Ray Absorption (XAS) and IR, augmented with computational modelling enable to understand the structure and the dynamics of active sites. The lecture will illustrate in particular how interfaces and\/or alloys in nanoparticles are created and how these specific sites\/interfaces evolve under reaction conditions and contributes to the catalytic events. This lecture will focus on two specific catalytic processes, namely propane dehydrogenation and CO2 hydrogenation,[2] which are two key industrial processes relevant to current and emerging strategies. Overall, this lecture highlights how interfaces, alloying and dynamics are driving the catalytic performances and how one need to revisit (open) our views on active sites in heterogeneous catalysis<\/p>\n<p><strong>References:<\/strong><br \/>\n<strong>1<\/strong> C. Cop\u00e9ret Single-Sites and Nanoparticles at Tailored Interfaces Prepared via Surface Organometallic Chemistry from Thermolytic Molecular Precursors. Acc. Chem. Res. 2019, 52, 1697\u20131708.<br \/>\n<strong>2<\/strong> a) Deciphering Metal-Oxide and Metal-Metal Interplay via Surface Organometallic Chemistry: A Case Study with CO2 Hydrogenation to Methanol. S. R. Docherty, C. Cop\u00e9ret J. Am. Chem. Soc. 2021, 143, 6767\u20136780. b) Heterogeneous Alkane Dehydrogenation Catalysts Investigated via a Surface Organometallic Chemistry Approach. S. R. Docherty, L. Rochlitz, P.-A. Payard, C. Cop\u00e9ret Chem. Soc. Rev. 2021, 50, 5806 \u2013 5822<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Christophe Cop\u00e9ret : ETH Zurich, CH<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,312,233],"class_list":["post-10976","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-lpcno","tribe_events_cat-seminars","cat_events","cat_lpcno","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Interfaces and nanoalloys: formation, dynamics and relevance in catalysis. - (Christophe Cop\u00e9ret \/ LPCNO \/ Seminar). - 30\/09\/2024 - FeRMI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Interfaces and nanoalloys: formation, dynamics and relevance in catalysis. - (Christophe Cop\u00e9ret \/ LPCNO \/ Seminar). - 30\/09\/2024 - FeRMI\" \/>\n<meta property=\"og:description\" content=\"Christophe Cop\u00e9ret : ETH Zurich, CH\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\/\" \/>\n<meta property=\"og:site_name\" content=\"FeRMI\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-25T08:01:12+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\\\/\",\"url\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\\\/\",\"name\":\"Interfaces and nanoalloys: formation, dynamics and relevance in catalysis. - (Christophe Cop\u00e9ret \\\/ LPCNO \\\/ Seminar). - 30\\\/09\\\/2024 - FeRMI\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/#website\"},\"datePublished\":\"2024-09-24T08:16:38+00:00\",\"dateModified\":\"2024-09-25T08:01:12+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/interfaces-and-nanoalloys-formation-dynamics-and-relevance-in-catalysis-cristophe-coperet-lpcno-seminar-30-09-2024\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Events\",\"item\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/events\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Interfaces and nanoalloys: formation, dynamics and relevance in catalysis. &#8211; 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