Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials
Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials
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DOI：
10.1016/j.apsusc.2007.09.063
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发表时间：
2008-02-15
影响因子：
6.7
通讯作者：
Hayes, Peter
中科院分区：
文献类型：
--
作者：
Yamashita, Toru;Hayes, Peter
通过在受控气体气氛中的高温平衡制备铁氧化物Fe 0.94O、Fe 3 O 4、Fe 2 O3和Fe 2SiO 4的样品。样品在真空中断裂，并测量了断裂表面的高分辨率XPS谱。根据2FeO中心点SiO2和Fe 2 O3标准样品的Fe 3 p XPS谱，分别求出了Fe 2+和Fe 3+的Fe 3 p峰位和峰形参数。利用这些参数分析了Fe_3 O_4和Fe_（1-y）O的Fe_（3 p）峰。结果表明，高分辨XPS技术可用于金属氧化物中Fe ~（2+）/Fe ~（3+）比值的测定。该技术具有应用于其他过渡金属氧化物体系的潜力。(c)2007年爱思唯尔B. V.保留所有权利。
Samples of the iron oxides Fe0.94O, Fe3O4, Fe2O3, and Fe2SiO4 were prepared by high temperature equilibration in controlled gas atmospheres. The samples were fractured in vacuum and high resolution XPS spectra of the fractured surfaces were measured. The peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the Fe 3p XPS spectra of the standard samples of 2FeO center dot SiO2 and Fe2O3, respectively. Using these parameters, the Fe 3p peaks of Fe3O4 and Fe1-yO are analysed. The results indicate that high resolution XPS techniques can be used to determine the Fe2+/Fe3+ ratios in metal oxides. The technique has the potential for application to other transition metal oxide systems. (c) 2007 Elsevier B. V. All rights reserved.