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

被引：119
|
作者：
Liu, Feng
Wechsler, Dominik
Zhang, Peng [1 ]
机构：
[1] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, Canada
来源：
CHEMICAL PHYSICS LETTERS | 2008年 / 461卷 / 4-6期
基金：
加拿大自然科学与工程研究理事会; 加拿大创新基金会; 加拿大健康研究院;
关键词：
D O I：
10.1016/j.cplett.2008.07.029
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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. ne 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. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：254 / 259
页数：6
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