Pd embedded in porous carbon (Pd@CMK-3) as an active catalyst for Suzuki reactions: accelerating mass transfer to enhance the reaction rate

Wang, Zhencai, Chen, Wei, Han, Zhenliang, Zhu, Jie, Lu, Na, Yang, Yun, Ma, Dekun, Chen, Ying and Huang, Shaoming 2014, Pd embedded in porous carbon (Pd@CMK-3) as an active catalyst for Suzuki reactions: accelerating mass transfer to enhance the reaction rate, Nano research, vol. 7, no. 9, pp. 1254-1262, doi: 10.1007/s12274-014-0488-x.

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Title Pd embedded in porous carbon (Pd@CMK-3) as an active catalyst for Suzuki reactions: accelerating mass transfer to enhance the reaction rate
Author(s) Wang, Zhencai
Chen, Wei
Han, Zhenliang
Zhu, Jie
Lu, Na
Yang, Yun
Ma, Dekun
Chen, YingORCID iD for Chen, Ying orcid.org/0000-0002-7322-2224
Huang, Shaoming
Journal name Nano research
Volume number 7
Issue number 9
Start page 1254
End page 1262
Total pages 9
Publisher Springer
Place of publication Berlin , Germany
Publication date 2014-09
ISSN 1998-0124
1998-0000
Keyword(s) CMK-3
mass transfer
Pd
porous catalyst
Suzuki reactions
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
HETEROGENEOUS PALLADIUM CATALYSTS
MIYAURA COUPLING REACTIONS
AQUEOUS-MEDIA
ARYL CHLORIDES
MESOPOROUS SILICA
SHAPE-SELECTIVITY
NETWORK POLYMERS
ROOM-TEMPERATURE
LIGAND-FREE
NANOPARTICLES
Summary Heterogeneous catalysts are promising candidates for use in organic reactions due to their advantages in separation, recovery, and environment compatibility. In this work, an active porous catalyst denoted as Pd embedded in porous carbon (Pd@CMK-3) has been prepared by a strategy involving immersion, ammoniahydrolysis, and heating procedures. Detailed characterization of the catalyst revealed that Pd(0) and Pd(II) species co-exist and were embedded in the matrix of the porous carbon (CMK-3). The as-prepared catalyst has shown high activity toward Suzuki reactions. Importantly, if the reaction mixture was homogenized by two minutes of ultrasonication rather than magnetic stirring before heating, the resistance to mass transfer in the pore channels was significantly reduced. As a result, the reactions proceeded more rapidly and a four-fold increase in the turnover frequency (TOF) could be obtained. When the ultrasonication was employed throughout the entire reaction process, the conversion could also exceed 90% even without the protection of inert gas, and although the reaction temperature was lowered to 30 °C. This work provides a method for fabricating highly active porous carbon encapsulated Pd catalysts for Suzuki reactions and proves that the problem of mass transfer in porous catalysts can be conveniently resolved by ultrasonication without any chemical modification being necessary.[Figure not available: see fulltext.] © 2014 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
Language eng
DOI 10.1007/s12274-014-0488-x
Field of Research 100708 Nanomaterials
100706 Nanofabrication, Growth and Self Assembly
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071543

Document type: Journal Article
Collection: Institute for Frontier Materials
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