Ultra-low palladium catalysts for phenylacetylene semihydrogenation: Synthesis by modified pulsed laser ablation–deposition

Authors: E.A. Karakhanov, I.A. Aksenov, S.V. Kardashev, A.L. Maksimov, F.N. Putilin, A.N. Shatokhin, S.V. Savilov

Abstract: 
Pulsed laser ablation–deposition (PLA–PLD) in inhomogeneous electrical and electromagnetic fields was used to synthesise supported Pd catalysts.Amodified PLA–PLDmethod opens up opportunities for obtaining Pd nanoparticles with the size from 2 to 5 nm by varying the deposition conditions. The catalysts were investigated by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The content of metal in catalysts was ultra-low (0.011–0.016 wt%). The catalysts demonstrated unexpectedly high activity for phenylacetylene semihydrogenation (TOFv 18–55 s−1, TOFs 41–224 s−1) at the Pd/substrate molar ratio less than 1/100 000 and styrene selectivity up to 93%. 

Keywords:
Heterogeneous egg-shell catalysts
Palladium nanoparticles
Phenylacetylene semihydrogenation
Pulsed laser ablation–deposition
Ultra-low precious metal content

Published in: Applied catalysis A: General  (Volumes 464–465, Pages 1-384, 15 August 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Ultra-low palladium catalysts for phenylacetylene semihydrogenation: Synthesis by modified pulsed laser ablation–deposition

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