Tuning the activity and selectivity of phenylacetylene hydrosilylation with triethylsilane in the liquid phase over size controlled Pt nanoparticles

Dorina G. Dobó, Dániel Sipos, András Sápi, Gábor London, Koppány L. Juhász, Ákos Kukovecz, Zoltán Kónya

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Pt nanoparticles with controlled sizes between 1.6–7.0 nm were anchored onto the surface and pores of SBA-15 silica support. The catalysts were characterized by TEM-ED, BET, XRD, and ICP-MS techniques and were tested in liquid phase hydrosilylation of phenylacetylene with triethylsilane. The activity of the 7.0 nm Pt nanoparticles anchored onto the surface of SBA-15 in hydrosilylation (TOF = 0.107 molecules·site−1·s−1) was ~2 times higher compared to the 5.0 nm Pt/SBA-15 (TOF = 0.049 molecules·site−1·s−1) catalyst and ~10 times higher compared to the 1.6 nm Pt/SBA-15 (TOF = 0.017 molecules·site−1·s−1) catalyst. Regarding the selectivity, bigger nanoparticles produced more vinylsilane-type products (α- and β-(E)-products) and less side products (mainly ditriethylsilane, triethyl(1-phenylethyl)silane and triethyl(phenethyl)silane derived likely from the reduction of the vinylsilane products). However, the selectivity towards the β-(E)-triethyl(styryl)silane was higher in the case of 1.6 nm Pt/SBA-15 catalyst compared to 5.0 nm Pt/SBA-15 and 7.0 nm Pt/SBA-15, respectively, which can be attributed to the beneficial effect of the size differences of the Pt nanoparticles as well as the differences of the quality and quantity of Pt/SiO2 interfaces.

Original languageEnglish
Article number22
JournalCatalysts
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 13 2018

Keywords

  • Catalysis by design
  • Controlled size Pt nanoparticles
  • Hydrosilylation
  • Pt/SiO interface

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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