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Enhanced catalytic activity of high index faceted palladium nanoparticles in Suzuki-Miyaura coupling due to efficient leaching mechanism
Collins, Gillian; Schmidt, Michael; O'Dwyer, Colm; McGlacken, Gerard P.; Holmes, Justin D.
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.
Keyword(s): Leaching; Palladium nanocrystals; Shape control nanoparticles; Suzuki coupling; Enhanced catalytic activity; High-index; Leaching mechanism; Palladium nanoparticles; Shape control; Suzuki-Miyaura coupling
Publication Date:
2014
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Enterprise Ireland; Science Foundation Ireland
Citation(s): COLLINS, G., SCHMIDT, M., O’DWYER, C., MCGLACKEN, G. & HOLMES, J. D. 2014. Enhanced Catalytic Activity of High-Index Faceted Palladium Nanoparticles in Suzuki–Miyaura Coupling Due to Efficient Leaching Mechanism. ACS Catalysis, 4, 3105-3111. http://pubs.acs.org/doi/abs/10.1021/cs5008014
Publisher(s): American Chemical Society
File Format(s): application/pdf
Related Link(s): http://pubs.acs.org/journal/accacs
First Indexed: 2016-07-13 05:47:21 Last Updated: 2016-10-14 05:55:20