Fe-N-C catalysts decorated with oxygen vacancies-rich CeOx to increase oxygen reduction performance for Zn-air batteries

[Display omitted] Platinum group metal (PGM)-free catalysts represented by nitrogen and iron co-doped carbon (Fe-N-C) catalysts are desirable and critical for metal-air batteries, but challenges still exist in performance and stability. Here, cerium oxides (CeOx) are incorporated into a two-dimensio...

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Veröffentlicht in:	Journal of colloid and interface science 2023-05, Vol.637, p.10-19
Hauptverfasser:	Tu, Feng-Di, Wu, Zi-Yun, Guo, Pan, Shen, Li-Xiao, Zhang, Zi-Yu, Dai, Yun-Kun, Ma, Miao, Liu, Jing, Xu, Bin, Zhang, Yun-Long, Zhao, Lei, Wang, Zhen-Bo
Format:	Artikel
Sprache:	eng
Schlagworte:	Ce4+/Ce3+ redox system Cerium oxides Nitrogen and iron co-doped carbon catalyst Oxygen reduction reaction Zinc-air battery
Online-Zugang:	Volltext
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Zusammenfassung:	[Display omitted] Platinum group metal (PGM)-free catalysts represented by nitrogen and iron co-doped carbon (Fe-N-C) catalysts are desirable and critical for metal-air batteries, but challenges still exist in performance and stability. Here, cerium oxides (CeOx) are incorporated into a two-dimensional Fe-N-C catalyst (FeNC-Ce-950) via a host-guest strategy. The Ce4+/Ce3+ redox system creates a large number of oxygen vacancies for rapid O2 adsorption to accelerate the kinetics of oxygen reduction reaction (ORR). Consequently, the as-synthesized FeNC-Ce-950 catalyst exhibits a half-wave potential (E1/2) of 0.921 V and negligible decay (
ISSN:	0021-9797 1095-7103
DOI:	10.1016/j.jcis.2023.01.057