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The Preparation of A vertical bar Model Nb Oxide Catalyst Epitaxially Grown
Xie Lei1; Wang Dezheng1; Wei Xuming1; Cao Yuming1; Guo Xiexian1; Ushikubo, T.2; Wada, K.2
关键词Eqitaxial Growth Nb Oxide Model Catalyst Crystal Film
刊名ACTA PHYSICO-CHIMICA SINICA
1995
DOI10.3866/PKU.WHXB19950310
11期:3页:234-241
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
英文摘要Metal oxides are useful catalytic material but are not well understood due to a scarcity of fundamental studies. They are rarely available as single crystals and their insulator nature causes charging problems when electrons or ions are probes. We report the use of a technique to overcome these problems by ancpitaxial growth onto a dissimilar metal to study the solid acid niobium oxide. The model niobium oxide grew epitaxially on a single crystal Pt(111) substrate. The growth mode of the niobium oxide overlayers indicates that the overlayer grows as a 2D monolayer on the Pt substrate followed by the development of a high density of small 3D crystallites. LEED patterns from the niobium oxide overlayer indicate that the small crystallites of niobium oxide grew with the (111) structure of the Pt(111) subtrate. The valence states of Nb of our model niobium oxide were determined from AES and ILS (ionization loss spectroscopy, which gives information similar to XPS) chemical shifts. Nb oxide overlayers could segragate into bulk Pt and decompose at high temperature. This Nb oxide overlayers will be used as a model Nb oxide catalyst.
语种英语
WOS记录号WOS:000207590200010
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140613
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Mitsubishi Kasei Corp, Res Ctr 1000, Midori Ku, Yokohama, Kanagawa 227, Japan
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Xie Lei,Wang Dezheng,Wei Xuming,et al. The Preparation of A vertical bar Model Nb Oxide Catalyst Epitaxially Grown[J]. ACTA PHYSICO-CHIMICA SINICA,1995,11(3):234-241.
APA Xie Lei.,Wang Dezheng.,Wei Xuming.,Cao Yuming.,Guo Xiexian.,...&Wada, K..(1995).The Preparation of A vertical bar Model Nb Oxide Catalyst Epitaxially Grown.ACTA PHYSICO-CHIMICA SINICA,11(3),234-241.
MLA Xie Lei,et al."The Preparation of A vertical bar Model Nb Oxide Catalyst Epitaxially Grown".ACTA PHYSICO-CHIMICA SINICA 11.3(1995):234-241.
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