Edge-sited Fe-N-4 atomic species improve oxygen reduction activity via boosting O-2 dissociation

doi:10.1016/j.apcatb.2020.118593

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Edge-sited Fe-N-4 atomic species improve oxygen reduction activity via boosting O-2 dissociation
	Ma, Ruguang ; Lin, Gaoxin ; Ju, Qiangjian ; Tang, Wei ; Chen, Gen ; Chen, Zhenhua ; Liu, Qian ; Yang, Minghui ; Lu, Yunfeng ; Wang, Jiacheng
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020
卷号	265
关键词	HIGH ELECTROCATALYTIC ACTIVITY DOPED CARBON FREE CATALYST FE NITROGEN PERFORMANCE GRAPHENE CO
DOI	10.1016/j.apcatb.2020.118593
英文摘要	The development of low-cost, efficient, and stable electrocatalysts toward the oxygen reduction reaction (ORR) is urgently demanded for scalable applications in fuel cells or zinc-air batteries (ZABs), but still remains a challenge. Herein, carbon materials with edge-sited Fe-N-4 atomic species (E-FeNC) were synthesized from pyrolysis of abundant Fe-containing biomass using silica spheres as hard template. The E-FeNC delivers remarkable ORB. performance with a half-wave potential of 0.875 V (vs. reversible hydrogen electrode (RHE)), much better than Pt/C (0.859 V), attributed to atomically dispersed Fe-N-4 moieties nearby graphitic edges. The density functional calculations reveal that O-2 molecule adsorbs on Fe-N-4 sites with an energetically favorable side-on configuration with elongated O=O bond rather than end-on form, boosting the subsequent dissociation pathway with a direct 4e reaction route. Using E-FeNC as cathode catalyst, the primary ZAB exhibits high specific capacity of 710 mA h g(-1) and power density of 151.6 mW cm(-2) . The rechargeable ZAB by coupling E-FeNC and NiFe layered double hydroxide (LDH) demonstrates long-term capacity retention over 200 h, superior to that using noble Pt/C and RuO2. This unique carbon material with atomically dispersed metal sites opens up an avenue for the design and engineering of electrocatalysts for energy conversion systems.
学科主题	Chemistry ; Engineering
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19624]
专题	2020专题
作者单位	1.Wang, JC (corresponding author), Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China. 2.Lu, YF (corresponding author), Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA.
推荐引用方式 GB/T 7714	Ma, Ruguang,Lin, Gaoxin,Ju, Qiangjian,et al. Edge-sited Fe-N-4 atomic species improve oxygen reduction activity via boosting O-2 dissociation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,265.
APA	Ma, Ruguang.,Lin, Gaoxin.,Ju, Qiangjian.,Tang, Wei.,Chen, Gen.,...&Wang, Jiacheng.(2020).Edge-sited Fe-N-4 atomic species improve oxygen reduction activity via boosting O-2 dissociation.APPLIED CATALYSIS B-ENVIRONMENTAL,265.
MLA	Ma, Ruguang,et al."Edge-sited Fe-N-4 atomic species improve oxygen reduction activity via boosting O-2 dissociation".APPLIED CATALYSIS B-ENVIRONMENTAL 265(2020).