Heterogeneous catalysis; surface science; surface segregation of alloys, atomic-resolution microscopy & spectroscopy, local chemical analysis


Abstract : The aim of the research is to identify and quantify the importance of the parameters governing the surface enrichment of some metals in alloys of catalytic relevance. An example is the Pt-Rh alloy used in catalytic converters for automotive pollution control. Under some conditions, temperature and gas composition may have antagonist effects over segregation phenomena. These effects could be usefully considered to fine-tune the surface composition of the catalytic nanoparticles and their activity and/or selectivity accordingly. An atomic scale approach is necessary for that purpose and a tomographic atom-probe equipment with a dedicated reaction cell will primarily be used for that research.
Promoteur/Supervisor : Prof. Visart de Bocarmé Thierry
Email : tvisart@ulb.ac.be
Site Web/Web site : http://cpmct.ulb.ac.be/
Centre de recherche/Research center : Chemical Physics of Materials (CPMCT)
Faculté/Faculty : Faculté des Sciences/Faculty of Sciences
Ecole doctorale/Graduate Colleges : Sciences/Science
Ecole doctorale thématique/Graduate School (French Only): Sciences et ingénierie des matériaux, interfaces et nanostructures (MAIN)



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