Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene
| Autor: | Margherita Macino, Graham J. Hutchings, Emma K. Gibson, Xiang Gao, Ruiyang Qu, Alexandra J. Barnes, Meenakshisundaram Sankar, Donald Bethell, Qian He, Christopher J. Kiely, Simon J. Freakley, David J. Morgan, Sultan Althahban, Andrew M. Beale, Nikolaos Dimitratos |
|---|---|
| Přispěvatelé: | 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., Hutchings G.J. |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
Bioengineering Hydrogenation Metal nanoparticles Platinum metals Synthesis (chemical) Titanium compounds 010502 geochemistry & geophysics 01 natural sciences Biochemistry Catalysis law.invention Metal law Hydrogenation reaction Calcination Selective reduction Metal nanoparticles Efficient catalyst 0105 earth and related environmental sciences Chemistry Process Chemistry and Technology Combinatorial chemistry visual_art visual_art.visual_art_medium Pt nanoparticles |
| Zdroj: | 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 & Hutchings, G J 2019, ' Tuning of catalytic sites in Pt/TiO 2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene ', Nature Catalysis, vol. 2, no. 10, pp. 873-881 . https://doi.org/10.1038/s41929-019-0334-3 |
| ISSN: | 2520-1158 |
| DOI: | 10.1038/s41929-019-0334-3 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink