One‐Pot Etching Pyrolysis to Defect‐Rich Carbon Nanosheets to Construct Multiheteroatom‐Coordinated Iron Sites for Efficient Oxygen Reduction

Abstract Constructing multiheteroatom coordination structure in carbonaceous substrates demonstrates an effective method to accelerate the oxygen reduction reaction (ORR) of supported single‐atom catalyst. Herein, the novel etching route assisted by potassium thiocyanate (KCNS) is developed to convert metal‐organic framework to 2D defect‐rich porous N,S‐co‐doped carbon nanosheets for anchoring atomically dispersed iron sites as the high‐performance ORR catalysts (Fe‐SACs). The well‐designed KCNS‐assisted etching route can generate spatial confinement template to direct the carbon nanosheet formation, etching condition to form defect‐rich structure, and additional sulfur atoms to coordinate iron species.…

• NN
  National Natural Science Foundation of China

  Awards: 21371023, 52173273
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2022CX11013