Supported core/shell bimetallic nanoparticles synthesis by atomic layer deposition

M.J. Weber, A.J.M. Mackus, M.A. Verheijen, C. Marel, van der, W.M.M. Kessels

Research output: Contribution to journalArticleAcademicpeer-review

116 Citations (Scopus)
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Abstract

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.
Original languageEnglish
Pages (from-to)2973-2977
Number of pages5
JournalChemistry of Materials
Volume24
Issue number15
DOIs
Publication statusPublished - 2012

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