Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra

doi:10.1016/j.cclet.2021.12.027

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	Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra
	Chen, Junnan 2,3; Li, Yujie 2,3; Lu, Ming 1,3; Niu, Yiming 2,3; Zhang, Bingsen 2,3
刊名	CHINESE CHEMICAL LETTERS
	2022-09-01
卷号	33 期号:9 页码:4375-4379
关键词	EELS ELNES EXELFS Transition metal oxides DFT Wavelet analyze
ISSN号	1001-8417
DOI	10.1016/j.cclet.2021.12.027
通讯作者	Zhang, Bingsen(bszhang@imr.ac.cn)
英文摘要	Relying on the electron energy loss spectrum (EELS) of metallic elements to obtain microstructure analysis is an investigation method of the reaction mechanisms of transition metal oxides (TMOs) in catalysis, energy storage and conversion. However, the low signal from K shell owing to insufficient electron beam energy, and the complicated electronic structure in L shell of the metal element restrict the analysis of the coordination environment of the TMOs. Herein, density functional theory (DFT) calculation, Fourier transform (FT) and wavelet transform (WT) were employed to probe the relationship between the four individual peaks in O K-edge spectra of iron oxides and the microstructure information (chemical bonds and atomic coordination). The findings show that the peak amplitude ration is in a linear correlation with the valence state of Fe element, and that the coordination number obtained by radial distribution function (RDF) is favorably linearly correlative with that from the standard coordination structure model. As a result, the quantitative analysis on the change of valence state and atomic coordination in microstructure can be realized by EELS O K-edge spectra. This study establishes EELS O K-edge spectrum as a promising pathway to quantitatively analyze the valence state and atomic coordination information of TMOs, and offers an effective method to conduct microstructure analysis via the EELS spectra of the non-metal element. (C) 2022 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
资助项目	National Natural Science Foundation of China[22072164] ; National Natural Science Foundation of China[51932005] ; National Natural Science Foundation of China[21773269] ; National Natural Science Foundation of China[52161145403] ; Liao Ning Revitalization Talents Program[XLYC1807175] ; Research Fund of SYNL
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000815137000045
资助机构	National Natural Science Foundation of China ; Liao Ning Revitalization Talents Program ; Research Fund of SYNL
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174986]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Bingsen
作者单位	1.Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Changchun 130103, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Junnan,Li, Yujie,Lu, Ming,et al. Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra[J]. CHINESE CHEMICAL LETTERS,2022,33(9):4375-4379.
APA	Chen, Junnan,Li, Yujie,Lu, Ming,Niu, Yiming,&Zhang, Bingsen.(2022).Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra.CHINESE CHEMICAL LETTERS,33(9),4375-4379.
MLA	Chen, Junnan,et al."Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra".CHINESE CHEMICAL LETTERS 33.9(2022):4375-4379.