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  • Title: The origin of shape sensitivity in palladium-catalyzed Suzuki-Miyaura cross coupling reactions.
    Author: Collins G, Schmidt M, O'Dwyer C, Holmes JD, McGlacken GP.
    Journal: Angew Chem Int Ed Engl; 2014 Apr 14; 53(16):4142-5. PubMed ID: 24615926.
    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.
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