Precise Au(x)Pt(1−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 s...

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Autores principales: Jahn, Sarah, Lechner, Sebastian J., Freichels, Helene, Möller, Martin, Spatz, Joachim P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4746634/
https://www.ncbi.nlm.nih.gov/pubmed/26856888
http://dx.doi.org/10.1038/srep20536
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author Jahn, Sarah
Lechner, Sebastian J.
Freichels, Helene
Möller, Martin
Spatz, Joachim P.
author_facet Jahn, Sarah
Lechner, Sebastian J.
Freichels, Helene
Möller, Martin
Spatz, Joachim P.
author_sort Jahn, Sarah
collection PubMed
description 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.
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spelling pubmed-47466342016-02-17 Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications Jahn, Sarah Lechner, Sebastian J. Freichels, Helene Möller, Martin Spatz, Joachim P. Sci Rep Article 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. Nature Publishing Group 2016-02-09 /pmc/articles/PMC4746634/ /pubmed/26856888 http://dx.doi.org/10.1038/srep20536 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Jahn, Sarah
Lechner, Sebastian J.
Freichels, Helene
Möller, Martin
Spatz, Joachim P.
Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title_full Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title_fullStr Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title_full_unstemmed Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title_short Precise Au(x)Pt(1−x) Alloy Nanoparticle Array of Tunable Composition for Catalytic Applications
title_sort precise au(x)pt(1−x) alloy nanoparticle array of tunable composition for catalytic applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4746634/
https://www.ncbi.nlm.nih.gov/pubmed/26856888
http://dx.doi.org/10.1038/srep20536
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