articleAdvanced MaterialsMay 3, 2023HYBRID OA

Hierarchically Porous Carbons with Highly Curved Surfaces for Hosting Single Metal FeN 4 Sites as Outstanding Oxygen Reduction Catalysts

GCGuangbo ChenRLRuihu LuCLChenzhao LiJYJianmin YuXLXiaodong Li

Technische Universität Dresden · Wuhan University of Technology · +8 more institutions

PubMed
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Abstract

Abstract Iron–nitrogen–carbon (FeNC) materials have emerged as a promising alternative to platinum‐group metals for catalyzing the oxygen reduction reaction (ORR) in proton‐exchange‐membrane fuel cells. However, their low intrinsic activity and stability are major impediments. Herein, an FeN–C electrocatalyst with dense FeN 4 sites on hierarchically porous carbons with highly curved surfaces (denoted as FeN 4 ‐ hc C) is reported. The FeN 4 ‐ hc C catalyst displays exceptional ORR activity in acidic media, with a high half‐wave potential of 0.85 V (versus reversible hydrogen electrode) in 0.5 m H 2 SO 4 . When integrated into a membrane electrode assembly, the corresponding cathode displays a high maximum…

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Topics & keywords

Topics
Keywords
  • Materials science
  • Catalysis
  • Oxygen reduction
  • Porosity
  • Oxygen reduction reaction
  • Oxygen
  • Metal
  • Chemical engineering
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