Alloy-structure-dependent electronic behavior and surface properties of Au–Pd nanoparticles

Au–Pd nanoparticles with core-shell and cluster-on-cluster structures show structure-dependent electronic behavior and surface properties. A series of Au–Pd nanoparticles (NPs) were prepared using mixed n-dodecylamine/tetraoctylphosphonium bromide ligands and characterized with UV–Vis absorption, TE...

Full description

Saved in:
Bibliographic Details
Published in:Chemical physics letters 2008-08, Vol.461 (4), p.254-259
Main Authors: Liu, Feng, Wechsler, Dominik, Zhang, Peng
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Au–Pd nanoparticles with core-shell and cluster-on-cluster structures show structure-dependent electronic behavior and surface properties. A series of Au–Pd nanoparticles (NPs) were prepared using mixed n-dodecylamine/tetraoctylphosphonium bromide ligands and characterized with UV–Vis absorption, TEM, X-ray absorption fine structure (XAFS), XAFS simulations, X-ray photoelectron spectroscopy (XPS) and catalytic hydrogenation reactions. Enriched Au core–Pd shell structures were found for the 75% and 50% Au NPs and a cluster-on-cluster structure was identified for the 25% Au NPs. Alloy-structure-dependent electronic behavior (e.g. Au 5d electronic density) and surface properties (e.g. surface reactivity) were revealed for these NPs. The results were consistently accounted for by considering the size, surface and alloying effects of the NPs.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2008.07.029