Structural investigation of amorphous Ni2B by EXAFS and XRD

被引：6
|
作者：
Ma, L [1 ]
Huang, W [1 ]
Yang, J [1 ]
Deng, J [1 ]
机构：
[1] FUDAN UNIV,DEPT CHEM,SHANGHAI 200433,PEOPLES R CHINA
来源：
JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C2期
关键词：
D O I：
10.1051/jp4:1997276
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The structure and thermostability of hyperfine amorphous Ni2B catalysts (HA-Ni2B) have been studied by EXAFS, XPD and DSC. The samples prepared by chemical reduction have been proved to be amorphous. The grain size is between 5 nm and 20 nm. A short-range order cluster is formed. The distances of Ni-B or Ni-Ni did not alter due to the change of the conditions but the coordination number of Ni is changed. The HA-Ni2B is only stable up to 140 degrees C. Over 140 degrees C, the crystal Ni and an intermediate formed. Finally the intermediate disappears but some B2O3 can be detected.
引用
收藏
页码：909 / 910
页数：2
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