Iron Encapsulated within Pod‐like Carbon Nanotubes for Oxygen Reduction Reaction

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.