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.
| Original language | English |
|---|---|
| Pages (from-to) | 873-881 |
| Number of pages | 9 |
| Journal | Nature Catalysis |
| Volume | 2 |
| Issue number | 10 |
| Early online date | 16 Sep 2019 |
| DOIs | |
| Publication status | Published - 1 Oct 2019 |
ASJC Scopus subject areas
- Catalysis
- Bioengineering
- Biochemistry
- Process Chemistry and Technology
Cite this
Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene. / Macino, Margherita; Barnes, Alexandra J.; Althahban, Sultan M.; Qu, Ruiyang; Gibson, Emma K.; Morgan, David J.; Freakley, Simon J.; Dimitratos, Nikolaos; Kiely, Christopher J.; Gao, Xiang; Beale, Andrew M.; Bethell, Donald; He, Qian; Sankar, Meenakshisundaram; Hutchings, Graham J.
In: Nature Catalysis, Vol. 2, No. 10, 01.10.2019, p. 873-881.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene
AU - Macino, Margherita
AU - Barnes, Alexandra J.
AU - Althahban, Sultan M.
AU - Qu, Ruiyang
AU - Gibson, Emma K.
AU - Morgan, David J.
AU - Freakley, Simon J.
AU - Dimitratos, Nikolaos
AU - Kiely, Christopher J.
AU - Gao, Xiang
AU - Beale, Andrew M.
AU - Bethell, Donald
AU - He, Qian
AU - Sankar, Meenakshisundaram
AU - Hutchings, Graham J.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85073523949&partnerID=8YFLogxK
U2 - 10.1038/s41929-019-0334-3
DO - 10.1038/s41929-019-0334-3
M3 - Article
AN - SCOPUS:85073523949
VL - 2
SP - 873
EP - 881
JO - Nature Catalysis
JF - Nature Catalysis
SN - 2520-1158
IS - 10
ER -