TY - JOUR
T1 - Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst
AU - Vu, Khanh B.
AU - Bukhriakov, Konstantin
AU - Anjum, Dalaver H.
AU - Rodionov, Valentin
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors are grateful to Prof. J.-M. Basset for helpful discussions. This research was supported by King Abdullah University of Science and Technology.
PY - 2015/3/23
Y1 - 2015/3/23
N2 - "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.
AB - "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.
UR - http://hdl.handle.net/10754/564138
UR - https://pubs.acs.org/doi/10.1021/acscatal.5b00262
UR - http://www.scopus.com/inward/record.url?scp=84926443734&partnerID=8YFLogxK
U2 - 10.1021/acscatal.5b00262
DO - 10.1021/acscatal.5b00262
M3 - Article
SN - 2155-5435
VL - 5
SP - 2529
EP - 2533
JO - ACS Catalysis
JF - ACS Catalysis
IS - 4
ER -