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Three dimensional star-like mesoporous nitrogen-doped carbon anchored with highly dispersed Fe and Ce dual-sites for efficient oxygen reduction reaction in Zn-air battery

Authors :
Bi, Zenghui
Wang, Yuwen
Chen, Jianbing
Zhang, Xianxi
Zhou, Shuxing
Wang, Xinzhong
Wågberg, Thomas
Hu, Guangzhi
Bi, Zenghui
Wang, Yuwen
Chen, Jianbing
Zhang, Xianxi
Zhou, Shuxing
Wang, Xinzhong
Wågberg, Thomas
Hu, Guangzhi
Publication Year :
2022

Abstract

Metal‑nitrogen‑carbon materials (M-N-C) have attracted much attention due to their low cost, high abundance, and efficient catalytic performance. Nevertheless, Fe-N-C materials are considered the most promising oxygen reduction reaction (ORR) catalysts for replacing noble metals. Ce is chemically active and has many metal valence states, and empty orbitals that can participate in coordination. On this basis, Fe, Ce-codoped catalyst was constructed in this study. The synergistic effect of the dual metal centers was verified, and a Fe, Ce-codoped nitrogen-doped carbon (FeCeNC) with six equal branch angles was proposed. The half-wave potential for the ORR catalyzed by FeCeNC is 0.855 V. As a rechargeable Zn-air battery cathode catalyst, FeCeNC exhibits excellent electrochemical performances, with an open-circuit voltage of 1.427 V, a maximum power density of 169.2 mW cm−2 and a stable cycling time of 80 h, demonstrating an excellent cycle performance.

Details

Database :
OAIster
Notes :
application/pdf, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1346172284
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1016.j.colcom.2022.100634