Low-temperature atomic layer deposition delivers more active and stable Pt-based catalysts

H.V. Bui, Fabio Grillo*, Sri Sharath Kulkarni, Ronald Bevaart, V.T. Nguyên, Bart Van Der Linden, Jacob A. Moulijn, Michiel Makkee, Michiel T. Kreutzer, J. Ruud Van Ommen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
65 Downloads (Pure)

Abstract

We tailored the size distribution of Pt nanoparticles (NPs) on graphene nanoplatelets at a given metal loading by using low-temperature atomic layer deposition carried out in a fluidized bed reactor operated at atmospheric pressure. The Pt NPs deposited at low temperature (100 °C) after 10 cycles were more active and stable towards the propene oxidation reaction than their high-temperature counterparts. Crucially, the gap in the catalytic performance was retained even after prolonged periods of time (>24 hours) at reaction temperatures as high as 450 °C. After exposure to such harsh conditions the Pt NPs deposited at 100 °C still retained a size distribution that is narrower than the one of the as-synthesized NPs obtained at 250 °C. The difference in performance correlated with the difference in the number of facet sites as estimated after the catalytic test. Our approach provides not only a viable route for the scalable synthesis of stable supported Pt NPs with tailored size distributions but also a tool for studying the structure-function relationship.

Original languageEnglish
Pages (from-to)10802-10810
Number of pages9
JournalNanoscale
Volume9
Issue number30
DOIs
Publication statusPublished - 14 Aug 2017

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