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Capping agent effect on Pd-supported nanoparticles in the hydrogenation of furfural

Capping agent effect on Pd-supported nanoparticles in the hydrogenation of furfural
Capping agent effect on Pd-supported nanoparticles in the hydrogenation of furfural

The catalytic performance of a series of 1 wt % Pd/C catalysts prepared by the sol-immobilization method has been studied in the liquid-phase hydrogenation of furfural. The temperature range studied was 25–75 °C, keeping the H2 pressure constant at 5 bar. The effect of the catalyst preparation using different capping agents containing oxygen or nitrogen groups was assessed. Polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), and poly (diallyldimethylammonium chloride) (PDDA) were chosen. The catalysts were characterized by ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The characterization data suggest that the different capping agents affected the initial activity of the catalysts by adjusting the available Pd surface sites, without producing a significant change in the Pd particle size. The different activity of the three catalysts followed the trend: PdPVA/C > PdPDDA/C > PdPVP/C. In terms of selectivity to furfuryl alcohol, the opposite trend has been observed: PdPVP/C > PdPDDA/C > PdPVA/C. The different reactivity has been ascribed to the different shielding effect of the three ligands used; they influence the adsorption of the reactant on Pd active sites.

Capping agent, Furfural, Hydrogenation, Nanoparticles, Palladium, Sol-immobilization
2073-4344
1-16
Alijani, Shahram
667987aa-3ee6-4c4f-8922-80bebe3bd5b9
Capelli, Sofia
83ebbed7-a251-47c4-8edd-a5e43d49d0b2
Cattaneo, Stefano
1307af2a-5c7a-4f56-8522-592248056202
Schiavoni, Marco
26e75a1a-14a4-40ff-9915-9b02c4ecc4e7
Evangelisti, Claudio
b395b359-f614-4901-8d78-a7abe3899bcb
Mohammed, Khaled M. H.
1c3c5641-4d0a-4c4d-bb26-fe733b8dbf63
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Tessore, Francesca
67393fa5-2e97-4b85-b7f9-dcae77d3f665
Villa, Alberto
d1f6646b-f0d4-420c-8a52-c09663f46e5f
Alijani, Shahram
667987aa-3ee6-4c4f-8922-80bebe3bd5b9
Capelli, Sofia
83ebbed7-a251-47c4-8edd-a5e43d49d0b2
Cattaneo, Stefano
1307af2a-5c7a-4f56-8522-592248056202
Schiavoni, Marco
26e75a1a-14a4-40ff-9915-9b02c4ecc4e7
Evangelisti, Claudio
b395b359-f614-4901-8d78-a7abe3899bcb
Mohammed, Khaled M. H.
1c3c5641-4d0a-4c4d-bb26-fe733b8dbf63
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Tessore, Francesca
67393fa5-2e97-4b85-b7f9-dcae77d3f665
Villa, Alberto
d1f6646b-f0d4-420c-8a52-c09663f46e5f

Alijani, Shahram, Capelli, Sofia, Cattaneo, Stefano, Schiavoni, Marco, Evangelisti, Claudio, Mohammed, Khaled M. H., Wells, Peter P., Tessore, Francesca and Villa, Alberto (2020) Capping agent effect on Pd-supported nanoparticles in the hydrogenation of furfural. Catalysts, 10 (1), 1-16, [11]. (doi:10.3390/catal10010011).

Record type: Article

Abstract

The catalytic performance of a series of 1 wt % Pd/C catalysts prepared by the sol-immobilization method has been studied in the liquid-phase hydrogenation of furfural. The temperature range studied was 25–75 °C, keeping the H2 pressure constant at 5 bar. The effect of the catalyst preparation using different capping agents containing oxygen or nitrogen groups was assessed. Polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), and poly (diallyldimethylammonium chloride) (PDDA) were chosen. The catalysts were characterized by ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The characterization data suggest that the different capping agents affected the initial activity of the catalysts by adjusting the available Pd surface sites, without producing a significant change in the Pd particle size. The different activity of the three catalysts followed the trend: PdPVA/C > PdPDDA/C > PdPVP/C. In terms of selectivity to furfuryl alcohol, the opposite trend has been observed: PdPVP/C > PdPDDA/C > PdPVA/C. The different reactivity has been ascribed to the different shielding effect of the three ligands used; they influence the adsorption of the reactant on Pd active sites.

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More information

Accepted/In Press date: 18 December 2019
e-pub ahead of print date: 19 December 2019
Published date: 1 January 2020
Additional Information: This article belongs to the Special Issue Catalytic Transformation of Renewables (Olefin, Bio-sourced, et. al)
Keywords: Capping agent, Furfural, Hydrogenation, Nanoparticles, Palladium, Sol-immobilization

Identifiers

Local EPrints ID: 437312
URI: http://eprints.soton.ac.uk/id/eprint/437312
ISSN: 2073-4344
PURE UUID: 9f7895ad-63ad-4a69-8a6b-6c81fe71cee6
ORCID for Khaled M. H. Mohammed: ORCID iD orcid.org/0000-0002-9538-0936
ORCID for Peter P. Wells: ORCID iD orcid.org/0000-0002-0859-9172

Catalogue record

Date deposited: 24 Jan 2020 17:31
Last modified: 28 Apr 2022 02:29

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Contributors

Author: Shahram Alijani
Author: Sofia Capelli
Author: Stefano Cattaneo
Author: Marco Schiavoni
Author: Claudio Evangelisti
Author: Peter P. Wells ORCID iD
Author: Francesca Tessore
Author: Alberto Villa

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