XAFS study of Fe- and Mn-promoted sulfated zirconia

被引：6
|
作者：
Yamamoto, T [1 ]
Tanaka, T
Takenaka, S
Yoshida, S
Onari, T
Takahashi, Y
Kosaka, T
Hasegawa, S
机构：
[1] Kyoto Univ, Dept Mol Engn, Kyoto 6068501, Japan
[2] Tokyo Gakugei Univ, Dept Chem, Tokyo 1848501, Japan
来源：
JOURNAL OF SYNCHROTRON RADIATION | 1999年 / 6卷
关键词：
in-situ XAFS; sulfated zirconia; Fe; Mn;
D O I：
10.1107/S0909049598017762
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The local structure around Fe and Mn in Fe. Mn-promoted sulfated zirconia was investigated by means of in-situ XAFS. The Mn atoms are found to be present as MnSO4 on the surface. The first post-edge peak of the Mn K-edge XANES spectrum was sharpened in a working state, and restored by evacuation. Fe K-edge XANES spectra showed that Fe is in a trivalent state and located at a center of a distorted octahedron. Fe atoms were suggested to be interstitially located into ZrO2 to form a solid solution. Any procedure dib not change the Fe K-edge EXAFS and the shape and edge-positions of the XANES spectra The reaction gases are in contact with Mn atoms, but not with the Mn atoms of the catalyst.
引用
收藏
页码：425 / 427
页数：3
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