articleJournal of the American Chemical SocietySep 13, 2017GREEN OA

Single Atomic Iron Catalysts for Oxygen Reduction in Acidic Media: Particle Size Control and Thermal Activation

HZHanguang ZhangSHSooyeon HwangMWMaoyu WangZFZhenxing FengSKS. Karakalos

University at Buffalo, State University of New York · Brookhaven National Laboratory · +3 more institutions

PubMed
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Abstract

It remains a grand challenge to replace platinum group metal (PGM) catalysts with earth-abundant materials for the oxygen reduction reaction (ORR) in acidic media, which is crucial for large-scale deployment of proton exchange membrane fuel cells (PEMFCs). Here, we report a high-performance atomic Fe catalyst derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding Fe ions to imidazolate ligands within 3D frameworks. Although the ZIF was identified as a promising precursor, the new synthetic chemistry enables the creation of well-dispersed atomic Fe sites embedded into porous carbon without the formation of aggregates. The size of catalyst particles is tunable through…

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1,501
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Topics & keywords

Topics
Keywords
  • Chemistry
  • Catalysis
  • Zeolitic imidazolate framework
  • Particle size
  • Nanoparticle
  • Inorganic chemistry
  • Proton exchange membrane fuel cell
  • Chemical engineering
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