Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst
KAUST DepartmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
Chemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2015-03-23
Print Publication Date2015-04-03
Permanent link to this recordhttp://hdl.handle.net/10754/564138
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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). © 2015 American Chemical Society.
CitationVu, K. B., Bukhryakov, K. V., Anjum, D. H., & Rodionov, V. O. (2015). Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst. ACS Catalysis, 5(4), 2529–2533. doi:10.1021/acscatal.5b00262
SponsorsThe authors are grateful to Prof. J.-M. Basset for helpful discussions. This research was supported by King Abdullah University of Science and Technology.
PublisherAmerican Chemical Society (ACS)