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Keywords:

  • carbon nanotubes;
  • heterogeneous catalysis;
  • iron;
  • nanoparticles;
  • oxygen reduction reaction
Thumbnail image of graphical abstract

Chainmail for catalysts: A catalyst with iron nanoparticles confined inside pea-pod-like carbon nanotubes (see picture) exhibits a high activity and remarkable stability as a cathode catalyst in polymer electrolyte membrane fuel cells (PEMFC), even in presence of SO2. The approach offers a new route to electro- and heterogeneous catalysts for harsh conditions.