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DOI	10.1016/j.scib.2020.11.009
	Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance
	Hu X.; Luo G.; Guo X.; Zhao Q.; Wang R.; Huang G.; Jiang B.; Xu C.; Pan F.
发表日期	2021
ISSN	20959273
起始页码	708
结束页码	719
卷号	66 期号:7
英文摘要	Zinc-air batteries (ZnABs) with high theoretical capacity and environmental benignity are the most promising candidates for next-generation electronics. However, their large-scale applications are greatly hindered due to the lack of high-efficient and cost-effective electrocatalysts. Transition metal phosphides (TMPs) have been reported as promising electrocatalysts. Notably, (Ni1−xCrx)2P (0 ≤ x ≤ 0.15) is an unstable electrocatalyst, which undergoes in-situ electrochemical oxidation during the initial oxygen evolution reaction (OER) and even in the activation cycles, and is eventually converted to Cr-NiOOH serving as the actual OER active sites with high efficiency. Density functional theory (DFT) simulations and experimental results elucidate that the OER performance could be significantly promoted by the synergistic effect of surface engineering and electronic modulations by Cr doping and in-situ phase transformation. The constructed rechargeable ZnABs could stably cycle for more than 208 h at 5 mA cm−2, while the voltage degradation is negligible. Furthermore, the developed catalytic materials could be assembled into flexible and all-solid-state ZnABs to power wearable electronics with high performance. © 2020 Science China Press
关键词	Cation tuning Density functional theory (DFT) calculations Electrocatalyst Metal phosphides Oxygen evolution reaction Zinc-air batteries
英文关键词	Chromium; Chromium compounds; Cost effectiveness; Density functional theory; Electrocatalysts; Flexible electronics; Nickel compounds; Oxygen evolution reaction; Phosphorus compounds; Zinc air batteries; Catalytic materials; Environmental benignity; Large-scale applications; Oxygen evolution activity; Oxygen evolution reaction (oer); Surface engineering; Theoretical capacity; Transition metal phosphide; Electrochemical oxidation
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/207426
作者单位	College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China; College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China
推荐引用方式 GB/T 7714	Hu X.,Luo G.,Guo X.,et al. Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance[J],2021,66(7).
APA	Hu X..,Luo G..,Guo X..,Zhao Q..,Wang R..,...&Pan F..(2021).Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance.Science Bulletin,66(7).
MLA	Hu X.,et al."Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance".Science Bulletin 66.7(2021).