Structures of surface- and bulk-dispersion phases of NiO/Al2O3

	Structures of surface- and bulk-dispersion phases of NiO/Al2O3
	Cai, XH; Ren, ZG; Hu TD(胡天斗); Hu, TD; Xie, YC
刊名	SURFACE AND INTERFACE ANALYSIS
	2001
卷号	32 期号:1 页码:293-295
关键词	NiO/gamma-Al2O3 coordination structure dispersion state XAFS XRD
通讯作者	Beijing Univ, Inst Phys Chem, Beijing 100871, Peoples R China ; Chinese Acad Sci, BEPC, BSRF, Beijing 100039, Peoples R China
英文摘要	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.
学科主题	Chemistry
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
原文出处	SCI
语种	英语
WOS记录号	WOS:000170551800065
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/236872]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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.