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Keywords:

  • electrocatalysis;
  • high-index facets;
  • nanostructures;
  • oxygen reduction reaction;
  • platinum
Thumbnail image of graphical abstract

Many facets: A simple synthetic route, which is based on reduction in aqueous solution, results in Pt concave nanocubes (see picture) enclosed by high-index facets such as {510}, {720}, and {830}. The nanocrystals exhibit electrocatalytic activity (per unit surface area) that is 3.5 times higher than the commercial Pt/C catalyst in the oxygen reduction reaction.