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

Jolien Dendooven, Ranjith K. Ramachandran, Eduardo Solano, Mert Kurttepeli, Lisa Geerts, Gino Heremans, Jan Rongé, Matthias M. Minjauw, Thomas Dobbelaere, Kilian Devloo-Casier, Johan A. Martens, André Vantomme, Sara Bals, Giuseppe Portale, Alessandro Coati and Christophe Detavernier ()
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Jolien Dendooven: Ghent University
Ranjith K. Ramachandran: Ghent University
Eduardo Solano: Ghent University
Mert Kurttepeli: University of Antwerp
Lisa Geerts: KU Leuven
Gino Heremans: KU Leuven
Jan Rongé: KU Leuven
Matthias M. Minjauw: Ghent University
Thomas Dobbelaere: Ghent University
Kilian Devloo-Casier: Ghent University
Johan A. Martens: KU Leuven
André Vantomme: KU Leuven
Sara Bals: University of Antwerp
Giuseppe Portale: DUBBLE Beamline BM26
Alessandro Coati: L′Orme des Merisiers
Christophe Detavernier: Ghent University

Nature Communications, 2017, vol. 8, issue 1, 1-12

Abstract: Abstract 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.

Date: 2017
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DOI: 10.1038/s41467-017-01140-z

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