Pd₃Sn nanoparticles on TiO₂ and ZnO supports as catalysts for semi-hydrogenation : synthesis and catalytic performance

Johnston, Shaun K.; Cherkasov, Nikolay; Perez-Barrado, Elena; Aho, Atte; Murzin, Dmitry Y.; Ibhadon, Alex O.; Francesconi, M. Grazia

Abstract

The two catalysts Pd₃Sn/TiO₂and Pd3Sn/ZnO were prepared via a one-pot procedure based on the “polyol method” with the addition of a capping agent (polyvinylpyrrolidone) to control the particle size distribution. The same procedure was used to prepare Pd/TiO2 and Pd/ZnO for comparison. All four catalysts showed high activity and selectivity for the selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE) in the liquid phase under identical conditions. However, Pd₃Sn/TiO₂and Pd₃Sn/ZnO show selectivities to alkene significantly higher than that of the Pd catalysts. Specifically, the selectivity increases from 96.4% to 97.4% on TiO₂support, and 96.2% to 97.6% on ZnO support, at 90% conversion. Transition electron microscopy shows nanoparticles evenly dispersed on the support, with mean particle sizes as low as 4.1 (±0.8) nm when Sn is incorporated into the catalyst. Unsupported Pd3Sn was prepared using the same method and characterised by powder X-Ray diffraction followed by the Rietveld refinement. Pd3Sn was found to be single-phase and isostructural to Pd metal with a face centred cubic unit cell.

Citation

Johnston, S. K., Cherkasov, N., Perez-Barrado, E., Aho, A., Murzin, D. Y., Ibhadon, A. O., & Francesconi, M. G. (2017). Pd₃Sn nanoparticles on TiO₂ and ZnO supports as catalysts for semi-hydrogenation : synthesis and catalytic performance. Applied catalysis. A, General, 544, 40-45. https://doi.org/10.1016/j.apcata.2017.07.005

• Acceptance Date: Jul 5, 2017
• Online Publication Date: Jul 8, 2017
• Publication Date: Aug 25, 2017
• Deposit Date: Jul 12, 2017
• Publicly Available Date: Jul 12, 2017
• Journal: Applied catalysis. A, General
• Print ISSN: 0926-860X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 544
• Pages: 40-45
• DOI: https://doi.org/10.1016/j.apcata.2017.07.005
• Keywords: Alkyne; Alkene; Bimetallic; Catalysis; Palladium; Selective hydrogenation; Acetylene
• Public URL: https://hull-repository.worktribe.com/output/453539
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0926860X17303058
• Additional Information: This is the accepted manuscript of an article published in pplied catalysis. A, General, 2017. The version of record is available at the DOI link in this record.