In situ preparation of amorphous carbon-activated palladium nanoparticles

N. Arul Dhas, H. Cohen, A. Gedanken

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Nanostructured particles of amorphous carbon-activated palladium metallic clusters have been prepared (in situ) at room temperature by ultrasound irradiation of an organometallic precursor, tris-μ-[dibenzylideneacetone]-dipalladium [(φ-CH=CH-CO-CH=CH-φ)3Pd2] in mesitylene. Characterization by elemental analysis, transmission electron microscopy, differential scanning calorimetry, X-ray diffraction, X-ray photoelectron spectroscopy, and BET surface area measurements shows that the product powder consists of nanosize particles, agglomerated in clusters of approximately 800 Å. Each particle is found to have a metallic core, covered by a carbonic shell that plays an important role in the stability of the nanoparticles. The catalytic activity in a Heck reaction, in the absence of phosphine ligands, has been demonstrated.

Original languageEnglish
Pages (from-to)6834-6838
Number of pages5
JournalJournal of Physical Chemistry B
Issue number35
StatePublished - 28 Aug 1997


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