Details

Autor(en) / Beteiligte

• Pan, Yingyi
• Ma, Deyun
• Liu, Huimin
• Wu, Hao
• He, Dehua
• Li, Yingwei

Titel

Uncoordinated carbonyl groups of MOFs as anchoring sites for the preparation of highly active Pd nano-catalystsElectronic supplementary information (ESI) available: Crystal data and powder XRD patterns. CCDC 711852. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c2jm30867c

Erscheinungsjahr

2012-05

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel Tm-containing metal-organic framework, [Tm(μ 2 -L)(μ 4 -L) 0.5 (H 2 O) 2 ]·3H 2 O (Tm-MOF), was prepared from the hydrothermal reaction of Tm(NO 3 ) 3 with 5-methylpyrazine-2-carboxylic acid in water. The 2,5-pyrazinedicarboxylate ligand ( L ) in Tm-MOF was formed in situ from 5-methylpyrazine-2-carboxylic acid under the above conditions. Tm-MOF is a three-dimensional (3D) coordination network with 1D open channels running across the coordination layers. Each L in bridging mode μ 2 contains two uncoordinated carbonyl groups which point to the channels. By using the predesigned Tm-MOF as a host, we have successfully incorporated small palladium nanoparticles into the channels by a simple impregnation method. The Pd/Tm-MOF catalyst exhibited a high catalytic activity in the hydrogenation of styrene. Moreover, the catalyst could be reused at least three times without loss of any activity. In contrast, a low dispersion of metal and a low activity in styrene hydrogenation were observed over the Pd catalyst supported on ZIF-8, which has a similar surface area as the Tm-MOF, but no uncoordinated carbonyl groups. The results suggest that the uncoordinated carbonyl groups in the Tm-MOF may play an important role in facilitating the dispersion of Pd nanoparticles through an intermolecular interaction with the Pd cations in the course of immobilization. A novel Tm-organic framework with uncoordinated carbonyl groups was employed as a support for the deposition of small Pd nanoparticles by a simple impregnation method, which exhibited a high catalytic activity in the hydrogenation of styrene.