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Publication Detail
Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Macino M, Barnes AJ, Althahban SM, Qu R, Gibson EK, Morgan DJ, Freakley SJ, Dimitratos N, Kiely CJ, Gao X, Beale AM, Bethell D, He Q, Sankar M, Hutchings GJ
  • Publication date:
    01/10/2019
  • Pagination:
    873, 881
  • Journal:
    Nature Catalysis
  • Volume:
    2
  • Issue:
    10
  • Status:
    Published
Abstract
© 2019, The Author(s), under exclusive licence to Springer Nature Limited. The catalytic activities of supported metal nanoparticles can be tuned by appropriate design of synthesis strategies. Each step in a catalyst synthesis method can play an important role in preparing the most efficient catalyst. Here we report the careful manipulation of the post-synthetic heat treatment procedure—together with control over the metal loading—to prepare a highly efficient 0.2 wt% Pt/TiO2 catalyst for the chemoselective hydrogenation of 3-nitrostyrene. For Pt/TiO2 catalysts with 0.2 and 0.5 wt% loading levels, reduction at 450 °C induces the coverage of TiOx over Pt nanoparticles through a strong metal–support interaction, which is detrimental to their catalytic activities. However, this can be avoided by following calcination treatment with reduction (both at 450 °C), allowing us to prepare an exceptionally active catalyst. Detailed characterization has revealed that the peripheral sites at the Pt/TiO2 interface are the most likely active sites for this hydrogenation reaction.
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