articleAdvanced MaterialsMay 18, 2022HYBRID OA

Mesopore‐Rich Fe–N–C Catalyst with FeN 4 –O–NC Single‐Atom Sites Delivers Remarkable Oxygen Reduction Reaction Performance in Alkaline Media

LPLishan PengYJYang JiaoYYYuqi YangFQFangren QianQWQing Wang

University of Auckland · Chinese Academy of Sciences · +4 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Abstract Fe–N–C catalysts offer excellent performance for the oxygen reduction reaction (ORR) in alkaline media. With a view toward boosting the intrinsic ORR activity of Fe single‐atom sites in Fe–N–C catalysts, fine‐tuning the local coordination of the Fe sites to optimize the binding energies of ORR intermediates is imperative. Herein, a porous FeN 4 –O–NCR electrocatalyst rich in catalytically accessible FeN 4 –O sites (wherein the Fe single atoms are coordinated to four in‐plane nitrogen atoms and one subsurface axial oxygen atom) supported on N‐doped carbon nanorods (NCR) is reported. Fe K‐edge X‐ray absorption spectroscopy (XAS) verifies the presence of FeN 4 –O active sites in FeN 4 –O–NCR, while…

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Topics & keywords

Topics
Keywords
  • Catalysis
  • Electrocatalyst
  • Oxygen reduction reaction
  • Materials science
  • X-ray absorption spectroscopy
  • Electrochemistry
  • Density functional theory
  • Absorption spectroscopy
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