物理化学学报 >> 1989, Vol. 5 >> Issue (02): 206-209.doi: 10.3866/PKU.WHXB19890215

研究论文 上一篇    下一篇

用EXAFS研究NiO在γ-Al2O3表面上的分散

金祥林; 蔡小海; 葛志红; 谢有畅; 唐有祺; 赵雅琴; 陆坤权   

  1. 北京大学结构化学开放研究实验室;

    中国科学院物理研究所

  • 收稿日期:1987-12-02 修回日期:1988-05-15 发布日期:1989-04-15
  • 通讯作者: 金祥林

INVESTIGATION OF DISPERSION OF NICKEL OXIDE ONTO THE SURFACE OF γ-ALUMINA BY EXAFS

Jin Xianglin; Cai Xiaohai; Ge Zhihong; Xie Youchang; Tang Youqi

Zhao Yaqin; Lu Kunquan

  

  1. Institute of Physical Chemistry; Peking Usiversity

    Institute of Physics; Academia Sinica; Beijing

  • Received:1987-12-02 Revised:1988-05-15 Published:1989-04-15
  • Contact: Jin Xianglin

摘要: 本文使用EXAFS方法研究NiO在γ-Al_2O_3的表面上的分散情况。文章讨论了Ni含量为7%、13%、18%、26%、35%的NiO/γ-Al_2O_3体系的径向结构函数图以及Ni含量为13%、26%的NiO/α-Al_2O_3样品的径向结构函数图,认为NiO能在γ-Al_2O_3表面上成单层分散。分散后的Ni-O距离接近NiO晶体的Ni-O距离,表明Ni离子和γ-Al_2O_3表面上的氧有很强的相互作用。

Abstract:

EXAFS spectroscopy has been used to investigate the dispersion of NiO onto the surface of γ-Al_2O_3. The comparison of the Fourier transformed EXAFS modulations of 7, 13, 18, 26, 35 wt% Ni/γ-Al_2O_3 and 13, 26 wt% Ni/α-Al_2O_3 suggests that NiO can disperse as a monolayer onto the surface of -γAl_2O_3. The Ni—O coordination distance which is near the Ni—O distance in NiO crystal suggests that the Ni ion interacts strongly with the oxygen on the γ-Al_2O_3 surface.