Journal
ADVANCED SCIENCE
Volume 9, Issue 15, Pages -Publisher
WILEY
DOI: 10.1002/advs.202200394
Keywords
binding energy; electronic structure; FeCo nanoparticles; mesoporous carbon; oxygen reduction
Categories
Funding
- NSF of China [51822202, 52173233]
- Innovation Program of Shanghai Municipal Education Commission [2021-01-07-00-03-E00109]
- Science and Technology Commission of Shanghai Municipality [19520713200]
- Shanghai Education Development Foundation
- Shanghai Municipal Education Commission [20SG33]
- Shanghai Scientific and Technological Innovation Project [19JC1410400]
- Key Basic Research Program of Science and Technology Commission of Shanghai Municipality [20JC1415300]
- Shanghai Sailing Program [20YF1400500]
- Shanghai Natural Science Foundation [20ZR1401500]
- DHU Distinguished Young Professor Program
- Fundamental Research Funds for the Central Universities [2232020D-02]
- Opening Project of Key Laboratory of Inorganic Functional Materials and Devices [KLIFMD202104]
- Australian Research Council [DP200103568]
- Australian Research Council [DP200103568] Funding Source: Australian Research Council
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This study reports an excellent oxygen reduction electrocatalyst FeCo/NC, which exhibits promising electrocatalytic activity and superior durability due to the highly exposed bimetal active sites and carefully designed structure. The research provides valuable insights into the structure-performance relationship of nonprecious metals and transition metal-based alloy catalysts.
The development of highly efficient and stable oxygen reduction electrocatalysts and revealing their underlying catalytic mechanism are crucial in expanding the applications of metal-air batteries. Herein, an excellent FeCo alloy nanoparticles (NPs)-decorated N-doped mesoporous carbon electrocatalyst (FeCo/NC) for oxygen reduction reaction, prepared through the pyrolysis of a dual metal containing metal-organic framework composite scaffold is reported. Benefiting from the highly exposed bimetal active sites and the carefully designed structure, the Fe0.25Co0.75/NC-800 catalyst exhibits a promising electrocatalytic activity and a superior durability, better than those of the state-of-the-art catalysts. Suggested by both the X-ray absorption fine structures and the density functional theoretical calculation, the outstanding catalytic performance is originated from the synergistic effects of the bimetallic loading in NC catalysts, where the electronic modulation of the Co active sites from the nearby Fe species leads to an optimized binding strength for reaction intermediates. This work demonstrates a class of highly active nonprecious metals electrocatalysts and provides valuable insights into investigating the structure-performance relationship of transition metal-based alloy catalysts.
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