Isolating Fe Atoms in N-Doped Carbon Hollow Nanorods through a ZIF-Phase-Transition Strategy for Efficient Oxygen Reduction

doi:10.1002/smll.202205033

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	Isolating Fe Atoms in N-Doped Carbon Hollow Nanorods through a ZIF-Phase-Transition Strategy for Efficient Oxygen Reduction
	Ma, FX; Liu, ZQ; Zhang, GB; Xiong, YX; Zhang, MT; Zheng, LR; Zhen, L; Xu, CY
	2022
发表期刊	SMALL (IF:8.643[JCR-2016],8.296[5-Year])
ISSN	1613-6810
EISSN	1613-6829
卷号	18 期号:49 页码:2205033
条目编号	IHEP00035409
文章类型	Article
摘要	Transition metal-nitrogen-carbon (TM-N-C) catalysts have been intensely investigated to tackle the sluggish oxygen reduction reactions (ORRs), but insufficient accessibility of the active sites limits their performance. Here, by using solid ZIF-L nanorods as self-sacrifice templates, a ZIF-phase-transition strategy is developed to fabricate ZIF-8 hollow nanorods with open cavities, which can be subsequently converted to atomically dispersed Fe-N-C hollow nanorods (denoted as Fe-1-N-C HNRs) through rational carbonization and following fixation of iron atoms. The microstructure observation and X-ray absorption fine structure analysis confirm abundant Fe-N-4 active sites are evenly distributed in the carbon skeleton. Thanks to the highly accessible Fe-N-4 active sites provided by the highly porous and open carbon hollow architecture, the Fe-1-N-C HNRs exhibit superior ORR activity and stability in alkaline and acidic electrolytes with very positive half-wave potentials of 0.91 and 0.8 V versus RHE, respectively, both of which surpass those of commercial Pt/C. Remarkably, the dynamic current density (J(K)) of Fe-1-N-C HNRs at 0.85 V versus RHE in alkaline media delivers a record value of 148 mA cm(-2), 21 times higher than that of Pt/C. The assembled Zn-air battery using Fe-1-N-C HNRs as cathode catalyst exhibits a high peak power density of 208 mW cm(-2).
关键词	carbon hollow structures Fe-N (4) oxygen reduction reaction phase-transition ZIF
DOI	10.1002/smll.202205033
语种	英语
WOS记录号	WOS:000871919300001
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/300373
专题	多学科研究中心实验物理中心
作者单位	中国科学院高能物理研究所
第一作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Ma, FX,Liu, ZQ,Zhang, GB,et al. Isolating Fe Atoms in N-Doped Carbon Hollow Nanorods through a ZIF-Phase-Transition Strategy for Efficient Oxygen Reduction[J]. SMALL,2022,18(49):2205033.
APA	Ma, FX.,Liu, ZQ.,Zhang, GB.,Xiong, YX.,Zhang, MT.,...&Xu, CY.(2022).Isolating Fe Atoms in N-Doped Carbon Hollow Nanorods through a ZIF-Phase-Transition Strategy for Efficient Oxygen Reduction.SMALL,18(49),2205033.
MLA	Ma, FX,et al."Isolating Fe Atoms in N-Doped Carbon Hollow Nanorods through a ZIF-Phase-Transition Strategy for Efficient Oxygen Reduction".SMALL 18.49(2022):2205033.