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
- 25Citations
- 28Captures
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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.
Bibliographic Details
Royal Society of Chemistry (RSC)
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