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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Vydáno v:	Nature communications Ročník 8; číslo 1; s. 1074 - 12
Hlavní autoři:	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
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	London Nature Publishing Group UK 20.10.2017 Nature Publishing Group Nature Portfolio
Témata:	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
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Shrnutí:	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.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	2041-1723 2041-1723
DOI:	10.1038/s41467-017-01140-z