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Structures of surface- and bulk-dispersion phases of NiO/Al2O3
Cai, XH; Ren, ZG; Hu TD(胡天斗); Hu, TD; Xie, YC
2001
发表期刊SURFACE AND INTERFACE ANALYSIS
卷号32期号:1页码:293-295
通讯作者Beijing Univ, Inst Phys Chem, Beijing 100871, Peoples R China ; Chinese Acad Sci, BEPC, BSRF, Beijing 100039, Peoples R China
摘要The structural features of surface-dispersion and bulk-dispersion states of NiO on gamma -Al2O3 have been studied by x-ray absorption fine structure (XAFS) in combination with x-ray diffraction (XRD) and XPS. The results obtained from XRD and XAFS show that surface and bulk dispersions of Ni2+ ions need different conditions and have different diffraction features and different coordination structures. In both the surface-dispersion phase and the solid solution, Ni2+ ions seem to prefer to keep the coordination mode in NiO, which is quite different from that in the stoichiometric spinel. The Ni/Al intensity ratios of XPS at different etching depths of samples have a maximum and the distribution of Ni2+ ions in the solid solution is not homogeneous. Both it and the coordination features provide evidence of the transition process of dispersing from surface to bulk. Copyright (C) 2001 John Wiley & Sons, Ltd.
文章类型Article; Proceedings Paper
关键词NiO/gamma-Al2O3 coordination structure dispersion state XAFS XRD
学科领域Chemistry
DOI10.1002/sia.1058
研究领域[WOS]Chemistry
URL查看原文
语种英语
WOS类目Chemistry, Physical
WOS记录号WOS:000170551800065
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/236872
专题多学科研究中心
作者单位中国科学院高能物理研究所
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Cai, XH,Ren, ZG,Hu TD,et al. Structures of surface- and bulk-dispersion phases of NiO/Al2O3[J]. SURFACE AND INTERFACE ANALYSIS,2001,32(1):293-295.
APA Cai, XH,Ren, ZG,胡天斗,Hu, TD,&Xie, YC.(2001).Structures of surface- and bulk-dispersion phases of NiO/Al2O3.SURFACE AND INTERFACE ANALYSIS,32(1),293-295.
MLA Cai, XH,et al."Structures of surface- and bulk-dispersion phases of NiO/Al2O3".SURFACE AND INTERFACE ANALYSIS 32.1(2001):293-295.
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