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Tuning the hydrogenation activity of Pd NPs on Al-MIL-53 by linker modification

Catalysis Science and Technology, ISSN: 2044-4753, Vol: 4, Issue: 3, Page: 795-802
2014
  • 25
    Citations
  • 0
    Usage
  • 28
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    25
    • Citation Indexes
      25
  • Captures
    28

Article Description

The hydrogenation activity of 3 wt.% Pd nanoparticles supported on various mono-group (H, OCH, NH, Cl, and NO) substituted Al-MIL-53 materials has been investigated. Substituents enhanced the dispersion of palladium nanoparticles on Al-MIL-53, leading to a narrow particle size distribution in the range of 2 to 4 nm. Pd nanoparticles on fresh catalysts were present as a mixture of Pd(ii) and Pd(0) with different ratios. These Pd species readily became metallic in a hydrogen flow even at room temperature. Their activities in hydrogenation of phenol and phenylacetylene are linked to the substituents on the aromatic ring of the framework. Catalysts with electron-donating groups (OCH and NH) show much higher activity than those containing electron-withdrawing groups (Cl and NO). This behavior might be explained by the hydrogen dissociation abilities of metallic Pd nanoparticles affected by the organic linkers. © 2014 The Royal Society of Chemistry.

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