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Supported metal nanoparticles with tailored catalytic properties through sol-immobilisation: applications for the hydrogenation of nitrophenols

Supported metal nanoparticles with tailored catalytic properties through sol-immobilisation: applications for the hydrogenation of nitrophenols
Supported metal nanoparticles with tailored catalytic properties through sol-immobilisation: applications for the hydrogenation of nitrophenols
The use of sol-immobilisation to prepare supported metal nanoparticles is an area of growing importance in heterogeneous catalysis; it affords greater control of nanoparticle properties compared to conventional catalytic routes e.g. impregnation. This work, and other recent studies, demonstrate how the properties of the resultant supported metal nanoparticles can be tailored by adjusting the conditions of colloidal synthesis i.e. temperature and solvent. We further demonstrate the applicability of these methods to the hydrogenation of nitrophenols using a series of tailored Pd/TiO2 catalysts, with low Pd loading 0.2 wt. %. Here, the temperature of colloidal synthesis is directly related to the mean particle diameter and the catalytic activity. Smaller Pd particles (2.2 nm, k = 0.632 min-1, TOF = 560 h-1) perform better than their larger counterparts (2.6 nm, k = 0.350 min-1, TOF = 370 h-1) for the hydrogenation of p-nitrophenol, with the catalyst containing smaller NPs found to have increased stability during recyclability studies, with high activity (> 90% conversion after 5 minutes) maintained across 5 catalytic cycles.
0301-7249
1-8
Rogers, Scott M.
81804d0d-1f08-4a12-b6c8-56d7d45a039b
Catlow, C. Richard A.
50b88125-9415-4b37-9146-af6783e42510
Gianolio, Diego
5b316f7d-f314-4337-954e-8c0ce8e38223
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, Nikolaos
a4385576-4a05-478b-8389-460bfb43412b
Rogers, Scott M.
81804d0d-1f08-4a12-b6c8-56d7d45a039b
Catlow, C. Richard A.
50b88125-9415-4b37-9146-af6783e42510
Gianolio, Diego
5b316f7d-f314-4337-954e-8c0ce8e38223
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, Nikolaos
a4385576-4a05-478b-8389-460bfb43412b

Rogers, Scott M., Catlow, C. Richard A., Gianolio, Diego, Wells, Peter P. and Dimitratos, Nikolaos (2018) Supported metal nanoparticles with tailored catalytic properties through sol-immobilisation: applications for the hydrogenation of nitrophenols. Faraday Discussions, 1-8. (doi:10.1039/C7FD00216E).

Record type: Article

Abstract

The use of sol-immobilisation to prepare supported metal nanoparticles is an area of growing importance in heterogeneous catalysis; it affords greater control of nanoparticle properties compared to conventional catalytic routes e.g. impregnation. This work, and other recent studies, demonstrate how the properties of the resultant supported metal nanoparticles can be tailored by adjusting the conditions of colloidal synthesis i.e. temperature and solvent. We further demonstrate the applicability of these methods to the hydrogenation of nitrophenols using a series of tailored Pd/TiO2 catalysts, with low Pd loading 0.2 wt. %. Here, the temperature of colloidal synthesis is directly related to the mean particle diameter and the catalytic activity. Smaller Pd particles (2.2 nm, k = 0.632 min-1, TOF = 560 h-1) perform better than their larger counterparts (2.6 nm, k = 0.350 min-1, TOF = 370 h-1) for the hydrogenation of p-nitrophenol, with the catalyst containing smaller NPs found to have increased stability during recyclability studies, with high activity (> 90% conversion after 5 minutes) maintained across 5 catalytic cycles.

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Scott_Rogers_Faraday_Main_06_03_2018 PDF - Accepted Manuscript
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More information

Accepted/In Press date: 1 January 2018
e-pub ahead of print date: 8 March 2018

Identifiers

Local EPrints ID: 418987
URI: http://eprints.soton.ac.uk/id/eprint/418987
ISSN: 0301-7249
PURE UUID: a33052e5-47db-4c5d-8962-88754c22ce0a
ORCID for Peter P. Wells: ORCID iD orcid.org/0000-0002-0859-9172

Catalogue record

Date deposited: 27 Mar 2018 16:30
Last modified: 16 Mar 2024 06:24

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Contributors

Author: Scott M. Rogers
Author: C. Richard A. Catlow
Author: Diego Gianolio
Author: Peter P. Wells ORCID iD
Author: Nikolaos Dimitratos

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