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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la300148e
|2 doi
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|a pubmed24n0721.xml
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|a eng
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|a Kim, Mijong
|e verfasserin
|4 aut
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|a Porosity control of PdSiO2 yolk-shell nanocatalysts by the formation of nickel phyllosilicate and its influence on Suzuki coupling reactions
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 02.08.2012
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|a Date Revised 17.04.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2012 American Chemical Society
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|a The surface of PdSiO(2) core-shell nanoparticles (1) was simply modified by the formation of nickel phyllosilicate. The addition of nickel salts formed branched nickel phyllosilicates and generated pores in the silica shells, yielding Pd@SiO(2)-Niphy nanoparticles (Niphy = nickel phyllosilicate; 2, 3). By removal of the silica residue, Pd@Niphy yolk-shell nanoparticles (4) was uniformly obtained. The four distinct nanostructures (1-4) were employed as catalysts for Suzuki coupling reactions with aryl bromide and phenylboronic acid, and the conversion yields were in the order of 1 < 2 < 3 < 4 as the pore volume and surface area of the catalysts increased. The reaction rates were strongly correlated with shell porosity and surface exposure of the metal cores. The chemical inertness of nickel phyllosilicate under the basic conditions rendered the catalysts reusable for more than five times without loss of activity
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|a Journal Article
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|a Park, Ji Chan
|e verfasserin
|4 aut
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|a Kim, Aram
|e verfasserin
|4 aut
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|a Park, Kang Hyun
|e verfasserin
|4 aut
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|a Song, Hyunjoon
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 15 vom: 17. Apr., Seite 6441-7
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|x 1520-5827
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|g volume:28
|g year:2012
|g number:15
|g day:17
|g month:04
|g pages:6441-7
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|u http://dx.doi.org/10.1021/la300148e
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