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DTSTART;TZID=Europe/Paris:20260327T100000
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UID:10000073-1774605600-1774609200@remade-project.eu
SUMMARY:Mechanisms of Pd nanoparticle formation and strong metal-support interaction in Pd/TiO2 revealed by operando XAS
DESCRIPTION:Zoom webinar | Replay on Youtube\nElizaveta KOZYR\,  \nE. Kozyr1\, P. Paciok2\, R. Pellegrini3\, M. Chiesa1\, Elena Groppo1\, L. Mino1\, A. Bugaev4 \n1University of Turin\, Italy; 2Forschungszentrum Jülich GmbH\, Germany; 3ALBAChimet S.p.A\, Italy;\n4Paul Scherrer Institute\, Switzerland; elizaveta.kozyr@unito.it \nUnderstanding the formation of active phases and metal-support interactions is essential for the rational design of efficient photocatalysts. In this work\, Pd/TiO2 catalysts prepared by photodeposition and deposition-precipitation were investigated using a combination of operando synchrotron-based X-ray absorption spectroscopy (XAS) and complementary microscopic and spectroscopic techniques. A custom operando photocatalytic cell enabled in situ monitoring of the Pd photodeposition process\, revealing the formation of single-atom Pd(0) sites as an initial step followed by the growth of ~1 nm Pd nanoparticles with narrow size distribution. Photodeposited catalysts exhibit strong metal-support interaction (SMSI)\, associated with the presence of Ti³⁺ sites at the Pd/TiO2 interface and direct Pd-Ti interactions observed by XAS\, EPR\, and EELS. These features lead to enhanced stabilization of metallic Pd even under oxidizing conditions\, in contrast to catalysts prepared by deposition-precipitation. The results highlight how synthesis pathways govern nanoparticle formation mechanisms and metal-support interactions in Pd/TiO2 photocatalysts. \nAcknowledgements \nWe thank ReMade@ARIE funded by the European Union as part of the Horizon Europe call HORIZON-INFRA-2021-SERV-01 under grant agreement number 101058414 and co-funded by the Swiss State Secretariat for Education\, Research and Innovation (SERI) under contract number 22.00187 for the access to the HR-STEM measurements (ERC\, Julich\, Germany) and XAS measurements at SuperXAS beamline of Swiss Light Source.
URL:https://remade-project.eu/index.php/event/mechanisms-of-pd-nanoparticle-formation-and-strong-metal-support-interaction-in-pd-tio2-revealed-by-operando-xas/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://remade-project.eu/wp-content/uploads/2026/03/260327_ReMade@ARI-seminar_KOZYR.jpg
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