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

Khanh B. Vu; Konstantin Bukhriakov; Dalaver H. Anjum; Valentin Rodionov

doi:10.1021/acscatal.5b00262

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

Khanh B. Vu, Konstantin Bukhriakov, Dalaver H. Anjum, Valentin Rodionov

Research output: Contribution to journal › Article › peer-review

79 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). © 2015 American Chemical Society.

Original language	English (US)
Pages (from-to)	2529-2533
Number of pages	5
Journal	ACS Catalysis
Volume	5
Issue number	4
DOIs	https://doi.org/10.1021/acscatal.5b00262
State	Published - Mar 23 2015

Bibliographical note

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.

ASJC Scopus subject areas

Catalysis

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10.1021/acscatal.5b00262

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title = "Surface-Bound Ligands Modulate Chemoselectivity and Activity of a Bimetallic Nanoparticle Catalyst",

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). {\textcopyright} 2015 American Chemical Society.",

author = "Vu, {Khanh B.} and Konstantin Bukhriakov and Anjum, {Dalaver H.} and Valentin Rodionov",

note = "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.",

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doi = "10.1021/acscatal.5b00262",

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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

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DO - 10.1021/acscatal.5b00262

M3 - Article

SN - 2155-5435

VL - 5

SP - 2529

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JO - ACS Catalysis

JF - ACS Catalysis

IS - 4

ER -

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

Abstract

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