期刊
CHEMISTRY OF MATERIALS
卷 24, 期 15, 页码 2973-2977出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm301206e
关键词
atomic layer deposition; core/shell nanoparticles; platinum; palladium; nanostructures; catalysis
资金
- Marie Curie Project ENHANCE (European Research Training Network of New materials: Innovative Concepts for their Fabrication, integration and Characterization) within the European seventh framework program
A continuing goal in catalysis research is to engineer the composition and structure of noble metal nanomaterials in order to precisely tune their catalytic activity. Herein, we present proof-of-concept results on the synthesis of supported bimetallic core/shell nanoparticles entirely by atomic layer deposition (ALD). ALD is a novel and scalable method, which can be used to prepare noble-metal catalysts on high surface area support materials. Two properties of ALD of noble metals, namely the Volmer-Weber growth and surface-selectivity, are exploited to decouple primary island growth from subsequent selective shell growth. This concept is applied to synthesize highly dispersed Pd/Pt and Pt/Pd nanoparticles. In-depth characterization of the nanoparticles provides evidence for the core/shell morphology and for the narrow size distribution. The self-limiting nature of the ALD process allows for independent control of the core and shell dimensions, opening up unique possibilities for precise engineering of metallic nanoparticle properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据