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

DOI: 10.3390/catal10010011 DOI Help

Authors: Shahram Alijani (University of Milan) , Sofia Capelli (University of Milan) , Stefano Cattaneo (University of Milan) , Marco Schiavoni (University of Milan) , Claudio Evangelisti (ISTM-Institute of Molecular Sciences and Technologies, CNR—National Research Council) , Khaled M. H. Mohammed (University of Southampton) , Peter P. Wells (University College London; UK Catalysis Hub, Research Complex at Harwell; Diamond Light Source) , Francesca Tessore (University of Milan) , Alberto Villa (University of Milan)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Catalysts , VOL 10

State: Published (Approved)
Published: December 2019

Open Access Open Access

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.

Journal Keywords: furfural; hydrogenation; palladium; nanoparticles; capping agent; sol-immobilization

Subject Areas: Chemistry

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