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

Macino, Margherita, Barnes, Alexandra J., Althahban, Sultan M., Qu, Ruiyang, Gibson, Emma K., Morgan, David J ORCID: https://orcid.org/0000-0002-6571-5731, Freakley, Simon J., Dimitratos, Nikolaos, Kiely, Christopher J. ORCID: https://orcid.org/0000-0001-5412-0970, Gao, Xiang, Beale, Andrew M., Bethell, Donald, He, Qian ORCID: https://orcid.org/0000-0003-4891-3581, Meenakshisundaram, Sankar ORCID: https://orcid.org/0000-0002-7105-0203 and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 2019. Tuning of catalytic sites in Pt/TiO2 catalysts for chemoselective hydrogenation of 3-nitrostyrene. Nature Catalysis 2 , pp. 873-881. 10.1038/s41929-019-0334-3

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Abstract

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:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Additional Information:	Correction published, recorded at http://orca.cf.ac.uk/134817
Publisher:	Nature Research
ISSN:	2520-1158
Date of First Compliant Deposit:	30 July 2019
Date of Acceptance:	25 July 2019
Last Modified:	05 Jun 2023 07:12
URI:	https://orca.cardiff.ac.uk/id/eprint/124592

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