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

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    Type
    Article
    Authors
    Vu, Khanh B.
    Bukhriakov, Konstantin
    Anjum, Dalaver H. cc
    Rodionov, Valentin cc
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Chemical Science Program
    Core Labs
    Electron Microscopy
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2015-03-23
    Online Publication Date
    2015-03-23
    Print Publication Date
    2015-04-03
    Permanent link to this record
    http://hdl.handle.net/10754/564138
    
    Metadata
    Show full item record
    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.
    Citation
    Vu, 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
    Sponsors
    The authors are grateful to Prof. J.-M. Basset for helpful discussions. This research was supported by King Abdullah University of Science and Technology.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Catalysis
    DOI
    10.1021/acscatal.5b00262
    ae974a485f413a2113503eed53cd6c53
    10.1021/acscatal.5b00262
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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