Controllable tuning of Fe-N nanosheets by Co substitution for enhanced oxygen evolution reaction

doi:10.1016/j.nanoen.2018.12.094

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Controllable tuning of Fe-N nanosheets by Co substitution for enhanced oxygen evolution reaction
	An, L ; Feng, JR ; Zhang, Y ; Zhao, YQ ; Si, R ; Wang, GC ; Cheng, FY ; Xi, PX ; Sun, SH
刊名	NANO ENERGY
	2019
卷号	57 期号:-页码:644—652
关键词	HIGHLY EFFICIENT REDUCTION REACTION IN-SITU WATER NANOPARTICLES ELECTROCATALYSTS PERFORMANCE PEROVSKITE CATALYSIS NITRIDE
ISSN号	2211-2855
DOI	10.1016/j.nanoen.2018.12.094
文献子类	期刊论文
英文摘要	Transition-metal nitrides (TMNs), especially iron-based TMNs, have high electrical conductivity, superior chemical stability and unique oxygen-reaction ability, and have emerged as a new form of noble metal-free electrocatalysts. In this paper, we demonstrate that the ORR-active/OER-inert single function catalyst Fe-N can be made as the OER/ORR-active bifunctional catalyst Co-Fe-N by controlled substitution of Fe with Co. To obtain atomic insights of the Co-enhanced OER catalysis, we develop a new exfoliation method to prepare atomically thin (1.1 nm) nanosheets (NSs) of CoxFe1-xN0.5 (x = 0, 0.05, 0.1, 0.15 and 0.2). Our studies show that both electronic structure and local binding environment of Fe are modified by Co substitution and the Co-Fe-N NSs show a volcano-like OER catalysis with Co0.15Fe0.85N0.5 NSs being the most efficient OER catalyst, showing the lowest overpotential of 266 mV at 10 mA cm(-2), a Tafel slope of similar to 30 mV dec(-1), and excellent stability in the 1.0 M KOH OER condition. Density functional theory (DFT) calculations suggest that the Co-Fe sites in the Co0.15Fe0.85N0.5 structure are optimized to promote OH* to O* conversion, O-O coupling and O-2 formation. The Co0.15Fe0.85N0.5 NSs are a class of new noble-metal-free catalyst for OER.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31527]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Nankai Univ, Coll Chem, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China; 2.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China; 3.Brown Univ, Dept Chem, Providence, RI 02912 USA; 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	An, L,Feng, JR,Zhang, Y,et al. Controllable tuning of Fe-N nanosheets by Co substitution for enhanced oxygen evolution reaction[J]. NANO ENERGY,2019,57(-):644—652.
APA	An, L.,Feng, JR.,Zhang, Y.,Zhao, YQ.,Si, R.,...&Sun, SH.(2019).Controllable tuning of Fe-N nanosheets by Co substitution for enhanced oxygen evolution reaction.NANO ENERGY,57(-),644—652.
MLA	An, L,et al."Controllable tuning of Fe-N nanosheets by Co substitution for enhanced oxygen evolution reaction".NANO ENERGY 57.-(2019):644—652.