A DFT study of PtAu bimetallic clusters adsorbed on MgO/Ag(100) ultrathin films
Literature Information
Sabrina Sicolo, Gianfranco Pacchioni
We have performed density functional theory calculations on the properties of small PtAun (n = 1–4) bimetallic clusters adsorbed on ultrathin MgO films deposited over the Ag(100) substrate. The PtAu bimetallic clusters show the occurrence of a charge transfer from the MgO/Ag interface to the supported nanoparticle with the formation of cluster anions. The Pt atom, which exhibits a stronger bonding with the oxide film and a higher diffusion barrier compared to Au, acts as a nucleation site for the bimetallic cluster and limits its diffusion on the surface.
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