Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst

Khanh B. Vu, Konstantin V. Bukhryakov, Dalaver H. Anjum, Valentin O. Rodionov

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

"Naked" metal nanoparticles (NPs) are thermodynamically and kinetically unstable in solution. Ligands, surfactants, or polymers, which adsorb at a particle's surface, can be used to stabilize NPs; however, such a mode of stabilization is undesirable for catalytic applications because the adsorbates block the surface active sites. The catalytic activity and the stability of NPs are usually inversely correlated. Here, we describe an example of a bimetallic (PtFe) NP catalyst stabilized by carboxylate surface ligands that bind preferentially to one of the metals (Fe). NPs stabilized by fluorous ligands were found to be remarkably competent in catalyzing the hydrogenation of cinnamaldehyde; NPs stabilized by hydrocarbon ligands were significantly less active. The chain length of the fluorous ligands played a key role in determining the chemoselectivity of the FePt NP catalysts. (Chemical Presented).

Original languageBritish English
Pages (from-to)2529-2533
Number of pages5
JournalACS Catalysis
Volume5
Issue number4
DOIs
StatePublished - 3 Apr 2015

Keywords

  • Bimetallic nanoparticles
  • Cinnamaldehyde
  • Fluorous chemistry
  • Ligand effects
  • Selective hydrogenation

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