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学科主题物理化学
Coverage and Substrate Effects on the Structural Change of FeOx Nanostructures Supported on Pt
Wei, Mingming; Fu, Qiang; Dong, Aiyi; Wang, Zhou-jun; Bao, Xinhe; Fu Q(傅强); Bao XH(包信和)
关键词Feo Pt Xps Oxide/metal Interface Oxidation Reduction
刊名TOPICS IN CATALYSIS
2014-06-01
DOI10.1007/s11244-014-0248-x
57期:10-13页:890-898
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Applied ; Chemistry, Physical
研究领域[WOS]Chemistry
英文摘要Structural changes of FeOx nanostructures supported on Pt(111) and Pt foil with response to oxidation and reduction treatments in O-2 and H-2 atmospheres upto 1.0 bar have been investigated by using X-ray photoelectron spectroscopy and scanning tunneling microscopy. We show that submonolayer O-Fe bilayer (FeO) structure on Pt(111) can be transformed to O-Fe-O trilayer (FeO2) upon oxidation in 5.0 x 10(-6) mbar O-2, while the FeO to FeO2 transformation happens over the full FeO film only with the O-2 partial pressure above 1.0 x 10(-3) mbar. Reduction of the submonolayer FeO2 structure back to the FeO structure occurs when exposed to 1.0 mbar H-2 at room temperature (RT). In contrast, the full FeO2 structure can be kept even under 1.0 bar H-2 exposure condition. The FeOx coverage and FeOx/Pt boundary play a critical role in the redox behavior of the supported FeOx nanostructures. Furthermore, we show that the FeOx nanostructures supported on Pt foil can be oxidized in a similar way as those on the Pt(111) surface. However, the Pt foil supported FeO2 nanostructures can be more deeply reduced to the state close to metallic Fe in 1.0 mbar H-2 at RT. The close-packed Pt(111) surface exhibits a stronger confinement effect on the FeO overlayer than the open polycrystalline Pt surface.
语种英语
WOS记录号WOS:000344156900008
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/144279
专题中国科学院大连化学物理研究所
通讯作者Fu Q(傅强); Bao XH(包信和)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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GB/T 7714
Wei, Mingming,Fu, Qiang,Dong, Aiyi,et al. Coverage and Substrate Effects on the Structural Change of FeOx Nanostructures Supported on Pt[J]. TOPICS IN CATALYSIS,2014,57(10-13):890-898.
APA Wei, Mingming.,Fu, Qiang.,Dong, Aiyi.,Wang, Zhou-jun.,Bao, Xinhe.,...&包信和.(2014).Coverage and Substrate Effects on the Structural Change of FeOx Nanostructures Supported on Pt.TOPICS IN CATALYSIS,57(10-13),890-898.
MLA Wei, Mingming,et al."Coverage and Substrate Effects on the Structural Change of FeOx Nanostructures Supported on Pt".TOPICS IN CATALYSIS 57.10-13(2014):890-898.
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