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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:, Freakley, Simon J., Dimitratos, Nikolaos, Kiely, Christopher J. ORCID:, Gao, Xiang, Beale, Andrew M., Bethell, Donald, He, Qian ORCID:, Meenakshisundaram, Sankar ORCID: and Hutchings, Graham J. ORCID: 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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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
Publisher: Nature Research
ISSN: 2520-1158
Date of First Compliant Deposit: 30 July 2019
Date of Acceptance: 25 July 2019
Last Modified: 11 Apr 2024 20:54

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