Independent tuning of size and coverage of supported Pt nanoparticles using atomic layer deposition

Synthetic methods that allow for the controlled design of well-defined Pt nanoparticles are highly desirable for fundamental catalysis research. In this work, we propose a strategy that allows precise and independent control of the Pt particle size and coverage. Our approach exploits the versatility...

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Veröffentlicht in:Nature communications Jg. 8; H. 1; S. 1074 - 12
Hauptverfasser: Dendooven, Jolien, Ramachandran, Ranjith K., Solano, Eduardo, Kurttepeli, Mert, Geerts, Lisa, Heremans, Gino, Rongé, Jan, Minjauw, Matthias M., Dobbelaere, Thomas, Devloo-Casier, Kilian, Martens, Johan A., Vantomme, André, Bals, Sara, Portale, Giuseppe, Coati, Alessandro, Detavernier, Christophe
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 20.10.2017
Nature Publishing Group
Nature Portfolio
Schlagworte:
639/301/299
639/301/357/354
639/301/930/1032
Atomic layer epitaxy
Catalysis
Catalysts
Grazing incidence
Humanities and Social Sciences
multidisciplinary
Nanoparticles
Nitrogen plasma
Particle size
Physics
Platinum
Science
Science (multidisciplinary)
Small angle X ray scattering
Tuning
X-ray fluorescence
X-ray scattering
ISSN:2041-1723, 2041-1723
Online-Zugang:Volltext
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Zusammenfassung:Synthetic methods that allow for the controlled design of well-defined Pt nanoparticles are highly desirable for fundamental catalysis research. In this work, we propose a strategy that allows precise and independent control of the Pt particle size and coverage. Our approach exploits the versatility of the atomic layer deposition (ALD) technique by combining two ALD processes for Pt using different reactants. The particle areal density is controlled by tailoring the number of ALD cycles using trimethyl(methylcyclopentadienyl)platinum and oxygen, while subsequent growth using the same Pt precursor in combination with nitrogen plasma allows for tuning of the particle size at the atomic level. The excellent control over the particle morphology is clearly demonstrated by means of in situ and ex situ X-ray fluorescence and grazing incidence small angle X-ray scattering experiments, providing information about the Pt loading, average particle dimensions, and mean center-to-center particle distance. The performance of supported nanoparticle catalysts is closely related to their size, shape and interparticle distance. Here, the authors introduce an atomic layer deposition-based strategy to independently tune the size and coverage of platinum nanoparticles with atomic-level precision.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-017-01140-z