Hollow N-doped carbon spheres with anchored single-atom Fe sites for efficient electrocatalytic oxygen reduction

WANG Min-min; FENG Chao; LIU Yun-qi; PAN Yuan

doi:10.1016/S1872-5813(22)60067-7

Volume 51 Issue 5

May 2023

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Article Navigation > Journal of Fuel Chemistry and Technology > 2023 > 51(5): 581-588

WANG Min-min, FENG Chao, LIU Yun-qi, PAN Yuan. Hollow N-doped carbon spheres with anchored single-atom Fe sites for efficient electrocatalytic oxygen reduction[J]. Journal of Fuel Chemistry and Technology, 2023, 51(5): 581-588. doi: 10.1016/S1872-5813(22)60067-7

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WANG Min-min, FENG Chao, LIU Yun-qi, PAN Yuan. Hollow N-doped carbon spheres with anchored single-atom Fe sites for efficient electrocatalytic oxygen reduction[J]. Journal of Fuel Chemistry and Technology, 2023, 51(5): 581-588. doi: 10.1016/S1872-5813(22)60067-7

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Hollow N-doped carbon spheres with anchored single-atom Fe sites for efficient electrocatalytic oxygen reduction

doi: 10.1016/S1872-5813(22)60067-7

1.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China

Funds: The project was supported by National Natural Science Foundation of China (22108306), Taishan Scholars Program of Shandong Province (tsqn201909065) and Shandong Provincial Natural Science Foundation (ZR2021YQ15, ZR2020QB174).

More Information

Corresponding author: E-mail: liuyq@upc.edu.cn; panyuan@upc.edu.cn
Received Date: 2022-08-19
Accepted Date: 2022-10-09
Rev Recd Date: 2022-09-19

Available Online: 2022-10-31

Publish Date: 2023-05-15

Abstract

Abstract

We anchored atomically dispersed Fe-N₄ sites on hollow N-doped carbon spheres (Fe SAs/HNCSs-800) for electrocatalytic ORR; the obtained material exhibited electrocatalytic activity and stability comparable to that of commercial Pt/C, with an onset potential of 0.925 V and a half-wave potential of 0.867 V. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption spectroscopy results confirmed the presence of highly dispersed Fe single atoms in Fe SAs/HNCSs-800. The results of experiments and theoretical calculations show that the single-atom dispersed Fe-N₄ serve as the ORR active sites, and the adjacent C defects can effectively regulate the electronic structure of Fe atoms and improve the electrocatalytic ORR activity.
- hollow N-doped carbon spheres,
- Fe-N₄ sites,
- single atoms,
- oxygen reduction reaction,
- electrocatalysts

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References(21)

References

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