Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene

Macino, M. et al. (2019) Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene. Nature Catalysis, 2(10), pp. 873-881. (doi: 10.1038/s41929-019-0334-3)

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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.

Item Type:Articles
Additional Information:MM and AJB acknowledge MAXNET Energy consortium for funding. AJB also acknowledges the EPRSC Centre for Doctoral Training in Catalysis (Grant number: EP/L016443/1). MS and QH thank Cardiff University for their respective University Research Fellowships and RQ acknowledges Chinese Scholarship Council (CSC) funding for his stay at Cardiff University. CJK gratefully acknowledges funding from the National Science Foundation Major Research Instrumentation program (GR# MRI/DMR-1040229). SMA thanks the Saudi Arabian government for his PhD scholarship.
Glasgow Author(s) Enlighten ID:Gibson, Dr Emma
Authors: Macino, M., Barnes, A. J., Althahban, S. M., Qu, R., Gibson, E. K., Morgan, D. J., Freakley, S. J., Dimitratos, N., Kiely, C. J., Gao, X., Beale, A. M., Bethell, D., He, Q., Sankar, M., and Hutchings, G. J.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Nature Catalysis
Publisher:Nature Publishing Group
ISSN (Online):2520-1158
Published Online:16 September 2019
Copyright Holders:Copyright © 2019 Springer Nature
First Published:First published in Nature Catalysis 2(10):873-881
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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