Enhancing the catalytic efficiency of the Heck coupling reaction by forming 5 nm Pd octahedrons using kinetic control

Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challen...

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Published inNano research Vol. 8; no. 6; pp. 2115 - 2123
Main Authors Long, Ran, Wu, Di, Li, Yaping, Bai, Yu, Wang, Chengming, Song, Li, Xiong, Yujie
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 01.06.2015
Subjects
Acids
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Catalysis
Catalysts
Chemistry and Materials Science
Condensed Matter Physics
Efficiency
Heck
Interface reactions
Joining
Materials Science
Nanocrystals
Nanotechnology
Octahedrons
Palladium
Particle size
Reaction kinetics
Research Article
Weight reduction
偶联反应
催化效率
八面体
动力学控制
界面反应
纳米晶体
钯
China
palladium
size control
catalysis
facet control
heck-type coupling reaction
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Summary:Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challenging to synthesize 5 nm Pd octahedrons with a relatively uniform size distribution using existing capping-agent techniques. Here, we used palladium as a model system to investigate how the kinetics of atomic addition could be precisely controlled using a syringe pump. As a result, our method produced Pd octahedrons as small as 5 nm, which increased the catalytic efficiency of Heck coupling reactions while reducing the weight of catalyst used.
Bibliography:11-5974/O4
palladium,facet control,size control,heck-type coupling reaction,catalysis
Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challenging to synthesize 5 nm Pd octahedrons with a relatively uniform size distribution using existing capping-agent techniques. Here, we used palladium as a model system to investigate how the kinetics of atomic addition could be precisely controlled using a syringe pump. As a result, our method produced Pd octahedrons as small as 5 nm, which increased the catalytic efficiency of Heck coupling reactions while reducing the weight of catalyst used.
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ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-015-0722-1