Pd/C catalysts based on synthetic carbons with bi- and tri-modal pore-size distribution:applications in flow chemistry

Fan, X., Sans, V., Sharma, S.K., Plucinski, P.K., Zaikovskii, V.A., Wilson, K., Tennison, S.R., Kozynchenko, A. and Lapkin, A.A. (2016). Pd/C catalysts based on synthetic carbons with bi- and tri-modal pore-size distribution:applications in flow chemistry. Catalysis Science and Technology, 6 (7), pp. 2387-2395.

Abstract

Two new types of phenolic resin-derived synthetic carbons with bi-modal and tri-modal pore-size distributions were used as supports for Pd catalysts. The catalysts were tested in chemoselective hydrogenation and hydrodehalogenation reactions in a compact multichannel flow reactor. Bi-modal and tri-modal micro-mesoporous structures of the synthetic carbons were characterised by N2 adsorption. HR-TEM, PXRD and XPS analyses were performed for characterising the synthesised catalysts. N2 adsorption revealed that tri-modal synthetic carbon possesses a well-developed hierarchical mesoporous structure (with 6.5 nm and 42 nm pores), contributing to a larger mesopore volume than the bi-modal carbon (1.57 cm3 g-1versus 1.23 cm3 g-1). It was found that the tri-modal carbon promotes a better size distribution of Pd nanoparticles than the bi-modal carbon due to presence of hierarchical mesopore limitting the growth of Pd nanoparticles. For all the model reactions investigated, the Pd catalyst based on tri-modal synthetic carbon (Pd/triC) show high activity as well as high stability and reproducibility. The trend in reactivities of different functional groups over the Pd/triC catalyst follows a general order alkyne ≫ nitro > bromo ≫ aldehyde.

Publication DOI: https://doi.org/10.1039/c5cy01401h
Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence -Funding: EPSRC (EP/C519736/1); Overseas Research Students Awards Scheme; University of Bath Research Studentship; and Royal Society for the award of an Industry Fellowship.
Uncontrolled Keywords: Catalysis
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://pubs.rsc ... 1H#!divAbstract (Publisher URL)
Published Date: 2016-04-07
Authors: Fan, X.
Sans, V.
Sharma, S.K.
Plucinski, P.K.
Zaikovskii, V.A.
Wilson, K. ( 0000-0003-4873-708X)
Tennison, S.R.
Kozynchenko, A.
Lapkin, A.A.

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