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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Shaun K. Johnston, Nikolay Cherkasov, Elena Pérez-Barrado, Atte Aho, Dmitry Y. Murzin, Alex O. Ibhadon, M. Grazia Francesconi
Publiceringsår: 2017
Tidskrift: Applied Catalysis A: General
Tidskriftsakronym: Appl. Catal., A
Volym: 544
Artikelns första sida, sidnummer: 40
Artikelns sista sida, sidnummer: 45
eISSN: 1873-3875


Abstrakt

The two catalysts Pd3Sn/TiO2 and 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/TiO2 and 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 TiO2 support, 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.


Nyckelord

catalysis

Senast uppdaterad 2019-16-11 vid 02:30