The origin of shape sensitivity in palladium-catalyzed Suzuki–Miyaura cross coupling reactions
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Additional file: Supporting Information
Date
2014-03-11
Authors
Collins, Gillian
Schmidt, Michael
O'Dwyer, Colm
Holmes, Justin D.
McGlacken, Gerard P.
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley-VCH
Published Version
Abstract
The shape sensitivity of Pd catalysts in Suzuki–Miyaura coupling reactions is studied using nanocrystals enclosed by well-defined surface facets. The catalytic performance of Pd nanocrystals with cubic, cuboctahedral and octahedral morphologies are compared. Superior catalytic reactivity is observed for Pd NCs with {100} surface facets compared to {111} facets. The origin of the enhanced reactivity associated with a cubic morphology is related to the leaching susceptibility of the nanocrystals. Molecular oxygen plays a key role in facilitating the leaching of Pd atoms from the surface of the nanocrystals. The interaction of O2 with Pd is itself facet-dependent, which in turn gives rise to more efficient leaching from {100} facets, compared to {111} facets under the reaction conditions.
Description
Keywords
Heterogeneous catalysis , Palladium , Surface facet , Suzuki–Miyaura coupling , Catalysis , Leaching , Nanocrystals , Palladium , Catalytic performance , Catalytic reactivity , Cross coupling reactions , Enhanced reactivity , Octahedral morphology , Shape sensitivities
Citation
COLLINS, G., SCHMIDT, M., O'DWYER, C., HOLMES, J. D. & MCGLACKEN, G. P. 2014. The Origin of Shape Sensitivity in Palladium-Catalyzed Suzuki–Miyaura Cross Coupling Reactions. Angewandte Chemie International Edition, 53, 4142-4145. http://dx.doi.org/10.1002/anie.201400483
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© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Collins, G., Schmidt, M., O'Dwyer, C., Holmes, J. D. and McGlacken, G. P. (2014), The Origin of Shape Sensitivity in Palladium-Catalyzed Suzuki–Miyaura Cross Coupling Reactions. Angew. Chem. Int. Ed., 53: 4142-4145which has been published in final form at doi: 10.1002/anie.201400483. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.