Precise AuxPt1−x Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications

A 3-dimensional Block Copolymer Micellar nanoLithography (BCML) process was used to prepare Au x Pt 1−x alloy nanoparticles (NPs) monodisperse in size and composition, strongly anchored onto SiO 2 -particles (0.2 wt.% Au x Pt 1−x /SiO 2 ). The particles possess a face-centered cubic (fcc) crystal st...

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Bibliographic Details
Published in:Scientific reports 2016-02, Vol.6 (1), p.20536-20536, Article 20536
Main Authors: Jahn, Sarah, Lechner, Sebastian J., Freichels, Helene, Möller, Martin, Spatz, Joachim P.
Format: Article
Language:English
Subjects:
140/146
639/925/352
639/925/357/354
Alloys
Carbon dioxide
Crystal structure
Humanities and Social Sciences
multidisciplinary
Nanoparticles
Oxidation
Science
Size distribution
Spectroscopy
X-ray spectroscopy
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Summary:A 3-dimensional Block Copolymer Micellar nanoLithography (BCML) process was used to prepare Au x Pt 1−x alloy nanoparticles (NPs) monodisperse in size and composition, strongly anchored onto SiO 2 -particles (0.2 wt.% Au x Pt 1−x /SiO 2 ). The particles possess a face-centered cubic (fcc) crystal structure and their size could be varied from 3–12 nm. We demonstrate the uniformity of the Au/Pt composition by analyzing individual NPs by energy-dispersive X-ray spectroscopy. The strongly bound Au x Pt 1−x NPs catalyzed the oxidation of CO with high activity. Thermal ageing experiments in pure CO 2 as well as in ambient atmosphere demonstrated stability of the size distribution for times as long as 22 h.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep20536