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Keywords:

  • electrochemistry;
  • fuel cells;
  • heterogeneous catalysis;
  • nanoparticles;
  • palladium
Thumbnail image of graphical abstract

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.