Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst
Type
ArticleKAUST Department
Advanced Nanofabrication, Imaging and Characterization Core LabChemical Science Program
Core Labs
Electron Microscopy
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Date
2015-03-23Online Publication Date
2015-03-23Print Publication Date
2015-04-03Permanent link to this record
http://hdl.handle.net/10754/564138
Metadata
Show full item recordAbstract
"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.5b00262Sponsors
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 Catalysisae974a485f413a2113503eed53cd6c53
10.1021/acscatal.5b00262