Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces

doi:10.1021/acs.langmuir.9b02468

	Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces
	Stoerzinger, Kelsey A.1,3; Pearce, Carolyn, I 2; Droubay, Timothy C.1; Shutthanandan, Vaithiyalingam 4; Liu, Zhi5,6,7 ; Arenholz, Elke 5,8; Rosso, Kevin M.1
	2019-10-29
发表期刊	LANGMUIR
ISSN	0743-7463
卷号	35 期号:43 页码:13872-13879
发表状态	已发表
DOI	10.1021/acs.langmuir.9b02468
摘要	The functionality of magnetite, Fe3O4, for catalysis and spintronics applications is dependent on the molar ratio of Fe2+ and Fe3+ and their distribution at the surface. In turn, this depends on a poorly understood interplay between crystallographic orientation, dopants, and the reactive adsorption of atmospheric species such as water. Here, (100)-, (110)-, and (111)-oriented films of titanomagnetite, Fe(3-x)TixO4, were grown by pulsed laser deposition and their composition, valence distribution, magnetism, and interaction with water were studied by ambient pressure X-ray photoelectron spectroscopy (AP-XPS) and X-ray magnetic circular dichroism. Although the bulk compositions match the desired stoichiometry, the surfaces were found to be enriched in Ti4+, especially the top 1 nm. The highest surface energy (110) film was the most reduced, tied to local Ti enrichment, and a corresponding decreased magnetic moment. AP-XPS showed that incorporation of x = 0.25 Ti dramatically lowered the propensity to form hydroxyl species at a given relative humidity, and also that hydroxylation is relatively invariant with orientation. In contrast, the affinity for water is similar across orientations, regardless of Ti incorporation, suggesting that relative humidity controls its uptake. The findings may help demystify the interactions that lead to specific distributions of Fe2+ and Fe3+ at magnetite surfaces, toward design of more deliberately active catalysts and magnetic devices.
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收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	Office of Science, BES[DE-AC02-05CH11231]
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000493586900009
出版者	AMER CHEMICAL SOC
EI主题词	Atmospheric humidity ; Circular dichroism spectroscopy ; Dichroism ; Humidity control ; Iron oxides ; Magnetic moments ; Magnetite ; Molar ratio ; Pulsed laser deposition ; Titanium ; X ray photoelectron spectroscopy
WOS关键词	2P ABSORPTION-SPECTRA ; HETEROGENEOUS FENTON ; ADSORPTION BEHAVIOR ; CATALYTIC-ACTIVITY ; DEGRADATION ; REACTIVITY ; SUBSTITUTION ; PERFORMANCE ; SIMULATION ; DICHROISM
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/80557
专题	大科学中心_PI研究组_刘志组物质科学与技术学院
通讯作者	Stoerzinger, Kelsey A.; Rosso, Kevin M.
作者单位	1.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, 902 Battelle Blvd, Richland, WA 99352 USA 2.Pacific Northwest Natl Lab, Energy & Environm Directorate, 902 Battelle Blvd, Richland, WA 99352 USA 3.Oregon State Univ, Sch Chem Biol & Environm Engn, 105 SW 26th St 116, Corvallis, OR 97331 USA 4.Pacific Northwest Natl Lab, Environm Mol Sci Lab, 3335 Innovat Blvd, Richland, WA 99352 USA 5.Lawrence Berkeley Natl Lab, Adv Light Source, 6 Cyclotron Rd, Berkeley, CA 94720 USA 6.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, 865 Changning Rd, Shanghai 200050, Peoples R China 7.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 8.Cornell High Energy Synchrotron Source, 161 Wilson Lab,Synchrotron Dr, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Stoerzinger, Kelsey A.,Pearce, Carolyn, I,Droubay, Timothy C.,et al. Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces[J]. LANGMUIR,2019,35(43):13872-13879.
APA	Stoerzinger, Kelsey A..,Pearce, Carolyn, I.,Droubay, Timothy C..,Shutthanandan, Vaithiyalingam.,Liu, Zhi.,...&Rosso, Kevin M..(2019).Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces.LANGMUIR,35(43),13872-13879.
MLA	Stoerzinger, Kelsey A.,et al."Structure, Magnetism, and the Interaction of Water with Ti-Doped Fe3O4 Surfaces".LANGMUIR 35.43(2019):13872-13879.