| Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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|---|---|---|
| Page(s) | C2-909 - C2-910 | |
| DOI | https://doi.org/10.1051/jp4:1997276 | |
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
J. Phys. IV France 7 (1997) C2-909-C2-910
DOI: 10.1051/jp4:1997276
1 Research Center for Analysis and Measurement, Fudan University, 220 Handan Road, Shanghai 200433, China
2 Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
© EDP Sciences 1997
J. Phys. IV France 7 (1997) C2-909-C2-910
DOI: 10.1051/jp4:1997276
Structural Investigation of Amorphous Ni2B by EXAFS and XRD
L. Ma1, W. Huang1, J. Yang2 and J. Deng21 Research Center for Analysis and Measurement, Fudan University, 220 Handan Road, Shanghai 200433, China
2 Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
Abstract
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°C. Over 140°C, the crystal Ni and an intermediate formed. Finally the intermediate disappears but some B2O3 can be detected.
© EDP Sciences 1997