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Chemoselective hydrogenation of cinnamaldehyde over a Pt-Lewis acid collaborative catalyst under ambient conditions

Industrial and Engineering Chemistry Research, ISSN: 1520-5045, Vol: 54, Issue: 5, Page: 1487-1497
2015
  • 69
    Citations
  • 0
    Usage
  • 45
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    69
    • Citation Indexes
      69
  • Captures
    45

Article Description

A novel Pt-Lewis acid collaborative catalyst system for selective hydrogenation of cinnamaldehyde is developed. The Pt/MIL-101 catalyst is able to efficiently catalyze the selective hydrogenation of the C=C group in cinnamaldehyde to hydrocinnamaldehyde at atmospheric pressure and room temperature with >99.9% selectivity at conversions >99.9%. The remarkably enhanced catalytic activity and selectivity of Pt/MIL-101 can be attributed to the synergism effect between highly dispersed Pt and Lewis acid sites. In situ ATR-IR spectroscopic studies and reaction results demonstrated that the Lewis acid sites on MIL-101 suppressed the reactivity of the C=O bond in cinnamaldehyde while enhancing the hydrogenation activity of the conjugated C=C bond through a strong interaction with the C=O bond, which subsequently inhibited the consecutive hydrogenation of the produced hydrocinnamaldehyde. The kinetic parameters of cinnamaldehyde hydrogenation over the Pt/MIL-101 catalyst were investigated, and a kinetic model was established based on the reaction mechanism and compared with experimental observations.

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