Interplay of Electronic Structure and Atomic Mobility in Nanoalloys of Au and Pt

• Published in: Journal of physical chemistry. C Vol. 117; no. 33; pp. 17268 - 17273
• Main Authors: Leppert, L, Albuquerque, R. Q, Foster, A. S, Kümmel, S
• Format: Journal Article
• Language: English
• Published: Columbus, OH American Chemical Society 22.08.2013
• Subjects: Catalytic methods; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals; Exact sciences and technology; Materials science; Methods of nanofabrication; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Physics; Nanoparticles; Gold; Density of states; Electronic structure; Catalysts; Fermi level; High density; Platinum; Adsorbates; Atomic structure; Nanostructured materials
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp404341v

Nanoalloys of gold and platinum show special chemical qualities. As catalysts, for example, they are superior to pure Au and Pt nanoparticles under rather different experimental conditions. We demonstrate that combining Au and Pt leads to an advantageous combination of properties: The Pt component contributes a high density of states close to the Fermi level, which can promote chemical activity. The Au component increases the atomic mobility, which can allow the particles to structurally adapt to different chemical situations and adsorbates. Special catalytic properties of Au–Pt nanoparticles are thus expected based on general considerations, that is, inherent properties of the Au and Pt component, respectively.