Enhanced catalytic activity of high-index faceted palladium nanoparticles in suzuki-miyaura coupling due to efficient leaching mechanism

Gillian Collins; Michael Schmidt; Colm Odwyer; Gerard McGlacken; Justin D. Holmes

doi:10.1021/cs5008014

Enhanced catalytic activity of high-index faceted palladium nanoparticles in suzuki-miyaura coupling due to efficient leaching mechanism

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Abstract

The structure-property relationship of palladium (Pd) catalysts in Suzuki-Miyaura cross-coupling reactions was investigated using Pd nanocrystals of uniform size and shape. Superior catalytic reactivity was observed for Pd nanoparticles with high-index {730} surface facets compared to low-index {100} facets. Although the nanocrystal morphologies were maintained during the reaction, the presence of Pd clusters, identified by high-resolution transmission electron microscopy (TEM), indicates a leaching mechanism. The nature of the surface facets on the nanoparticles was observed to influence the rate of Pd leaching during the Suzuki coupling reaction. The enhanced reactivity observed for the high-index facet catalysts stems from the greater number of leachable atoms of low abstraction energy available on high-index planes.

Original language	English
Pages (from-to)	3105-3111
Number of pages	7
Journal	ACS Catalysis
Volume	4
Issue number	9
DOIs	https://doi.org/10.1021/cs5008014
Publication status	Published - 5 Sep 2014

Keywords

leaching
palladium nanocrystals
shape control nanoparticles
Suzuki coupling

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10.1021/cs5008014

https://hdl.handle.net/10468/2279Licence: CC BY-NC-ND

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title = "Enhanced catalytic activity of high-index faceted palladium nanoparticles in suzuki-miyaura coupling due to efficient leaching mechanism",

abstract = "The structure-property relationship of palladium (Pd) catalysts in Suzuki-Miyaura cross-coupling reactions was investigated using Pd nanocrystals of uniform size and shape. Superior catalytic reactivity was observed for Pd nanoparticles with high-index \{730\} surface facets compared to low-index \{100\} facets. Although the nanocrystal morphologies were maintained during the reaction, the presence of Pd clusters, identified by high-resolution transmission electron microscopy (TEM), indicates a leaching mechanism. The nature of the surface facets on the nanoparticles was observed to influence the rate of Pd leaching during the Suzuki coupling reaction. The enhanced reactivity observed for the high-index facet catalysts stems from the greater number of leachable atoms of low abstraction energy available on high-index planes.",

keywords = "leaching, palladium nanocrystals, shape control nanoparticles, Suzuki coupling",

author = "Gillian Collins and Michael Schmidt and Colm Odwyer and Gerard McGlacken and Holmes, \{Justin D.\}",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

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day = "5",

doi = "10.1021/cs5008014",

language = "English",

volume = "4",

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journal = "ACS Catalysis",

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TY - JOUR

T1 - Enhanced catalytic activity of high-index faceted palladium nanoparticles in suzuki-miyaura coupling due to efficient leaching mechanism

AU - Collins, Gillian

AU - Schmidt, Michael

AU - Odwyer, Colm

AU - McGlacken, Gerard

AU - Holmes, Justin D.

PY - 2014/9/5

Y1 - 2014/9/5

N2 - The structure-property relationship of palladium (Pd) catalysts in Suzuki-Miyaura cross-coupling reactions was investigated using Pd nanocrystals of uniform size and shape. Superior catalytic reactivity was observed for Pd nanoparticles with high-index {730} surface facets compared to low-index {100} facets. Although the nanocrystal morphologies were maintained during the reaction, the presence of Pd clusters, identified by high-resolution transmission electron microscopy (TEM), indicates a leaching mechanism. The nature of the surface facets on the nanoparticles was observed to influence the rate of Pd leaching during the Suzuki coupling reaction. The enhanced reactivity observed for the high-index facet catalysts stems from the greater number of leachable atoms of low abstraction energy available on high-index planes.

AB - The structure-property relationship of palladium (Pd) catalysts in Suzuki-Miyaura cross-coupling reactions was investigated using Pd nanocrystals of uniform size and shape. Superior catalytic reactivity was observed for Pd nanoparticles with high-index {730} surface facets compared to low-index {100} facets. Although the nanocrystal morphologies were maintained during the reaction, the presence of Pd clusters, identified by high-resolution transmission electron microscopy (TEM), indicates a leaching mechanism. The nature of the surface facets on the nanoparticles was observed to influence the rate of Pd leaching during the Suzuki coupling reaction. The enhanced reactivity observed for the high-index facet catalysts stems from the greater number of leachable atoms of low abstraction energy available on high-index planes.

KW - leaching

KW - palladium nanocrystals

KW - shape control nanoparticles

KW - Suzuki coupling

UR - https://www.scopus.com/pages/publications/84907708452

U2 - 10.1021/cs5008014

DO - 10.1021/cs5008014

M3 - Article

AN - SCOPUS:84907708452

SN - 2155-5435

VL - 4

SP - 3105

EP - 3111

JO - ACS Catalysis

JF - ACS Catalysis

IS - 9

ER -

Enhanced catalytic activity of high-index faceted palladium nanoparticles in suzuki-miyaura coupling due to efficient leaching mechanism

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