A theoretical and experimental XAS study of monolayer dispersive supported CuO/gamma-Al2O3 catalysts
Chen DL(陈栋梁); Wu ZY(吴自玉); Chen, DL; Wu, ZY
刊名RADIATION PHYSICS AND CHEMISTRY
2006
卷号75期号:11页码:1921-1925
关键词monolayer dispersion Cuo/gamma-Al2O3 catalysts XAS MS calculation
学科分类Chemistry; Nuclear Science & Technology; Physics
DOI10.1016/j.radphyschem.2005.10.036
通讯作者CAS, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article; Proceedings Paper
英文摘要The local structures of supported CuO/gamma-Al2O3 monolayer dispersive catalysts with different CuO loadings have been investigated by EXAFS and multiple scattering XANES simulations. The EXAFS results show that the first nearest neighbors around the Cu atoms in the CuO/gamma-Al2O3 catalysts are similar to that of the polycrystalline CuO powder, which is independent of the CuO loadings. Moreover, the Cu K-XANES FEFF8 calculations for CuO reveal that the monolayer-dispersed CuO species are of small distorted (CUO4)(m)(n+) clusters, which is mainly composed of a distorted CuO6 octahedron incorporated in the surface octahedral vacant sites of the gamma-Al2O3 support. We consider that the CuO species for the CuO/gamma-Al2O3 catalysts with loadings of 0.4 and 0.8 mmol/100m(2) are distorted (CuO4)(m)(n+) clusters composed mainly of a distorted CuO6 octahedron incorporated in the surface octahedral vacant sites of the gamma-Al2O3 support after calcinations at high temperature in air for a few hours. On the contrary, for the CuO/gamma-Al2O3 with loading of 1.2mmol/100m(2), the local structure of Cu atoms in CuO/y-Al2O3 is similar to that of polycrystalline CuO powder. (c) 2006 Elsevier Ltd. All rights reserved.
类目[WOS]Chemistry, Physical ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical
研究领域[WOS]Chemistry ; Nuclear Science & Technology ; Physics
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语种英语
WOS记录号WOS:000242185600092
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239581
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
作者单位中国科学院高能物理研究所
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Chen DL,Wu ZY,Chen, DL,et al. A theoretical and experimental XAS study of monolayer dispersive supported CuO/gamma-Al2O3 catalysts[J]. RADIATION PHYSICS AND CHEMISTRY,2006,75(11):1921-1925.
APA 陈栋梁,吴自玉,Chen, DL,&Wu, ZY.(2006).A theoretical and experimental XAS study of monolayer dispersive supported CuO/gamma-Al2O3 catalysts.RADIATION PHYSICS AND CHEMISTRY,75(11),1921-1925.
MLA 陈栋梁,et al."A theoretical and experimental XAS study of monolayer dispersive supported CuO/gamma-Al2O3 catalysts".RADIATION PHYSICS AND CHEMISTRY 75.11(2006):1921-1925.
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