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Can atomic-buckling control chemical reaction? The case of dehydrogenation of phthalocyanine molecules on a GdAu2/Au(111)

AuthorsFarnesi Camellone, Matteo; Correa, Ana; Barragán, Ana; Pedio, Maddalena; Fabris, Stefano; Cepek, Cinzia; Vitali, Lucia
Issue Date1-Jul-2019
CitationIVC-21 (2019)
AbstractThe efficiency of chemical reactions on surfaces is traditionally related to their lattice structure. The periodic out-of-plane lattice distortions of supported 2D layers offer an alternative strategy to surface functionalization, scarcely investigated so far. Here, we show that the variable buckling geometry of a GdAu2 Moiré overlayer supported on the Au(111) surface exposes specific singleatom sites that control the dehydrogenation process of phthalocyanine (H2-PC) molecules. Thus, at most 1/3 of the adsorbed H2- PC molecules, corresponding to the ones adsorbed on the most reactive sites, undergo the dehydrogenation reaction. The outward displacement of distinct Gd sites is a spontaneous consequence of the lattice mismatch between the substrate and the alloy as previously reported. We show that these atomic sites promote the selective dehydrogenation of H2-PC molecules.
DescriptionTrabajo presentado en el 21st International Vacuum Conference (IVC-21), celebrada en Malmö (Suecia), del 1 al 5 de julio de 2019
Appears in Collections:(CFM) Comunicaciones congresos
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