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Superior Fe x N electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media

Authors
  • Jiang, Hunan1
  • Li, Jinyang1
  • Liang, Mengni1
  • Deng, Hanpeng1
  • Zhou, Zuowan1
  • 1 Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, China , (China)
Type
Published Article
Journal
Nanotechnology Reviews
Publisher
De Gruyter
Publication Date
Sep 07, 2020
Volume
9
Issue
1
Pages
843–852
Identifiers
DOI: 10.1515/ntrev-2020-0057
Source
De Gruyter
Keywords
License
Green

Abstract

Although Fe–N/C catalysts have received increasing attention in recent years for oxygen reduction reaction (ORR), it is still challenging to precisely control the active sites during the preparation. Herein, we report Fe x [email protected] catalysts with the size of 2–6 nm derived from the pyrolysis of graphene oxide and 1,1′-diacetylferrocene as C and Fe precursors under the NH3/Ar atmosphere as N source. The 1,1′-diacetylferrocene transforms to Fe3O4 at 600°C and transforms to Fe3N and Fe2N at 700°C and 800°C, respectively. The as-prepared Fe x [email protected] catalysts exhibited superior electrocatalytic activities in acidic and alkaline media compared with the commercial 10% Pt/C, in terms of electrochemical surface area, onset potential, half-wave potential, number of electrons transferred, kinetic current density, and exchange current density. In addition, the stability of FGN-8 also outperformed commercial 10% Pt/C after 10000 cycles, which demonstrates the as-prepared Fe x [email protected] as durable and active ORR catalysts in acidic media.

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