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

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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.

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

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Publication details

The article was received on 26 Apr 2017, accepted on 10 Jul 2017 and first published on 12 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR02984E
Citation: Nanoscale, 2017, Advance Article
  • Open access: Creative Commons BY-NC license
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    Low-temperature atomic layer deposition delivers more active and stable Pt-based catalysts

    H. Van Bui, F. Grillo, S. S. Kulkarni, R. Bevaart, N. Van Thang, B. van der Linden, J. A. Moulijn, M. Makkee, M. T. Kreutzer and J. R. van Ommen, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR02984E

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