Direct atomic-level insight into the active sites of a high-performance PGM-free ORR catalyst
Hoon T Chung(Los Alamos National Laboratory), David A. Cullen(Oak Ridge National Laboratory), Drew Higgins(Los Alamos National Laboratory), Brian T. Sneed(Oak Ridge National Laboratory), Edward F. Holby(Los Alamos National Laboratory), Karren L. More(Oak Ridge National Laboratory), Piotr Zelenay(Los Alamos National Laboratory)
Cited by 1,654Open Access
Abstract
Replacing platinum in air-fed fuel cells Replacing expensive and scarce platinum catalysts in polymer electrolyte membrane fuel cells for the oxygen reduction reaction (ORR) with ones based on non-noble metals would speed up the adoption of hydrogen fuel vehicles. Most of the candidate replacement catalysts that have shown high performance do so only when running on pure oxygen. Chung et al. developed an iron-nitrogen-carbon catalyst from two nitrogen precursors that forms a high-porosity structure and exhibits high ORR performance when running on air. The proposed catalytically active site is FeN 4 . Science , this issue p. 479
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