Publisher: Springer Science and Business Media LLC

Issue: 10

License: http://www.springer.com/tdm

Publication date(s): 2019/10 (print) 2019/09/16 (online)

Pages: 873-881

Volume: 2 Issue: 10

Journal: Nature Catalysis

Link: http://www.nature.com/articles/s41929-019-0334-3.pdf

URL: http://dx.doi.org/10.1038/s41929-019-0334-3

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.