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Molecular Fe-N4 Moieties Coupled with Atomic Co-N4 Sites Toward Improved Oxygen Reduction Performance

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [7];  [2];  [2];  [2];  [7];  [1]
  1. Kunming University of Science and Technology (China)
  2. Washington State Univ., Pullman, WA (United States)
  3. Northern Illinois Univ., DeKalb, IL (United States)
  4. Central South University, Changsha (China)
  5. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
  6. Northwestern Univ., Evanston, IL (United States)
  7. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
Research on high-efficiency and cost-efficient catalysts for oxygen reduction reaction (ORR) is still a vital but challenging issue for commercializing metal–air batteries. Herein, a single-molecule/atom hybrid catalyst is developed to boost the ORR, in which iron phthalocyanine molecules containing molecular Fe-N4 moieties couple with atomic Co-N4 sites on the surface of polyhedral carbon. Density functional theory calculations reveal that face-to-face laminated construction of Fe-N4 and Co-N4 in the hybrid catalyst can effectively modulate the electronic structure of active iron atoms and reduce the energy barrier of the rate-determining step for ORR. As a result, this hybrid catalyst demonstrates excellent ORR performance, featuring a half-wave potential of 0.904 V, a peak power density of 238.3 mW cm-2 for zinc–air battery, and outstanding electrocatalytic stability. Here, this work offers a distinctive and robust molecular/atomic engineering approach to creating efficient electrocatalysts, advancing the fields of metal–air batteries.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2473653
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 32 Vol. 34; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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