气候变化领域集成服务门户(CCPortal): Bonding interface boosts the intrinsic activity and durability of NiSe@Fe2O3 heterogeneous electrocatalyst for water oxidation

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DOI	10.1016/j.scib.2020.06.003
	Bonding interface boosts the intrinsic activity and durability of NiSe@Fe2O3 heterogeneous electrocatalyst for water oxidation
	Guo K.; Wang Y.; Yang S.; Huang J.; Zou Z.; Pan H.; Shinde P.S.; Pan S.; Huang J.; Xu C.
发表日期	2021
ISSN	20959273
起始页码	52
结束页码	61
卷号	66 期号:1
英文摘要	The intrinsic activity and durability of oxygen evolution reaction (OER) electrocatalysts are mainly dominated by the surface and interface properties of active materials. Herein, a core-shell heterogeneous structure (NF/NiSe@Fe2O3) is fabricated via two-step hydrothermal method, which exhibits a low overpotential of 220 mV (or 282 mV) at 10 mA/cm2 (or 200 mA/cm2), a small Tafel slope of 36.9 mV/dec, and long-term stability (~230 h) in 1 mol/L KOH for OER. X-ray photoelectron spectroscopy and X-ray absorption spectroscopy reveal the (oxy)hydroxide-rich surface and strong coupling interface between NiSe and Fe2O3 via the Fe-Se bond. Density functional theory calculation suggests that the d-band center and electronic state of NiSe@Fe2O3 heterojunction are well optimized due to the formation of Fe-Se bond, which is favorable for the enhanced OER activity because of the easy adsorption of oxygen-containing intermediates and desorption of O2 in the OER process. In addition, the unique core-shell structure and robust bonding interface are responsible for the good stability for OER. This work provides fundamental insights on the bonding effect that determine the performance of OER electrocatalyst. © 2020 Science China Press
关键词	Bonding interface Core-shell Electrocatalyst Nanostructure Oxygen evolution
英文关键词	Chemical bonds; Density functional theory; Durability; Electrocatalysts; Electronic states; Gas adsorption; Hematite; Heterojunctions; Iron metallography; Oxygen; Oxygen evolution reaction; Potassium hydroxide; Selenium compounds; Shells (structures); Slope stability; X ray absorption spectroscopy; X ray photoelectron spectroscopy; Bonding interfaces; Core shell structure; Heterogeneous structures; Intrinsic activities; Long term stability; Oxygen evolution reaction (oer); Surface and interface properties; Two-step hydrothermal method; Nickel compounds
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207411
作者单位	State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China; Department of Chemistry, Marquette University, Milwaukee, WI 53201, United States; Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, United States
推荐引用方式 GB/T 7714	Guo K.,Wang Y.,Yang S.,et al. Bonding interface boosts the intrinsic activity and durability of NiSe@Fe2O3 heterogeneous electrocatalyst for water oxidation[J],2021,66(1).
APA	Guo K..,Wang Y..,Yang S..,Huang J..,Zou Z..,...&Xu C..(2021).Bonding interface boosts the intrinsic activity and durability of NiSe@Fe2O3 heterogeneous electrocatalyst for water oxidation.Science Bulletin,66(1).
MLA	Guo K.,et al."Bonding interface boosts the intrinsic activity and durability of NiSe@Fe2O3 heterogeneous electrocatalyst for water oxidation".Science Bulletin 66.1(2021).