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Growth of Concave Polyhedral Pd Nanocrystals with 32 Facets Through In Situ Facet-Selective Etching

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Facing the pyramids by etching forward: Concave palladium polyhedra have been successfully prepared by selectively etching the {100} facets in situ by I ions. Due to the presence of a high density of atomic steps and surface relaxation, the concave palladium polyhedra exhibit an enhanced electrocatalytic activity towards ethanol oxidation.

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