Details
| Original language | English |
|---|---|
| Pages (from-to) | 479-490 |
| Number of pages | 12 |
| Journal | Catalysis today |
| Volume | 8 |
| Issue number | 4 |
| Publication status | Published - 5 Mar 1991 |
| Externally published | Yes |
Abstract
X-ray absorption spectroscopy has been applied to the characterization of metal atom-substituted microporous materials. The two spectral regions of an X-ray absorption spectrum - XANES and EXAFS - provide information about the local coordination environment of the atom investigated. Gallosilicate sodalites are shown to contain Ga in fourfold coordinated framework sites with GaO bond lengths of 1.83(2) Å. By contrast, in CoAPO-20, tetrahedrally and octahedrally coordinated Co atoms have been identified. In TS-1, a catalytically active titanium silicate having the structural features of the zeolite ZSM-5, Ti is octahedrally coordinated by oxygen atoms. There are indications that Ti is incorporated into the framework of the zeolitic material.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
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In: Catalysis today, Vol. 8, No. 4, 05.03.1991, p. 479-490.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - X-ray absorption spectroscopy of metal atom-substituted microporous materials
AU - Behrens, P.
AU - Felsche, J.
AU - Niemann, W.
N1 - Funding information: ACKNOWLEDGMENT We thank HASYLAB, especially R. Frahm, for allocating beam time. Valuable assistance during the XAS measurements from M. Denecke, J, Ehrich, M. Friiba. P. Kizler, Th. Lemke and K. Lochte is gratefully acknowledged. Thanks are due to C. Engelhardt and G. Wildermath for characterization of samples by MAS NMR and thermal analysis, resp. This work was supported by the BMFT under contract 03-FE2KON.
PY - 1991/3/5
Y1 - 1991/3/5
N2 - X-ray absorption spectroscopy has been applied to the characterization of metal atom-substituted microporous materials. The two spectral regions of an X-ray absorption spectrum - XANES and EXAFS - provide information about the local coordination environment of the atom investigated. Gallosilicate sodalites are shown to contain Ga in fourfold coordinated framework sites with GaO bond lengths of 1.83(2) Å. By contrast, in CoAPO-20, tetrahedrally and octahedrally coordinated Co atoms have been identified. In TS-1, a catalytically active titanium silicate having the structural features of the zeolite ZSM-5, Ti is octahedrally coordinated by oxygen atoms. There are indications that Ti is incorporated into the framework of the zeolitic material.
AB - X-ray absorption spectroscopy has been applied to the characterization of metal atom-substituted microporous materials. The two spectral regions of an X-ray absorption spectrum - XANES and EXAFS - provide information about the local coordination environment of the atom investigated. Gallosilicate sodalites are shown to contain Ga in fourfold coordinated framework sites with GaO bond lengths of 1.83(2) Å. By contrast, in CoAPO-20, tetrahedrally and octahedrally coordinated Co atoms have been identified. In TS-1, a catalytically active titanium silicate having the structural features of the zeolite ZSM-5, Ti is octahedrally coordinated by oxygen atoms. There are indications that Ti is incorporated into the framework of the zeolitic material.
UR - http://www.scopus.com/inward/record.url?scp=0026416560&partnerID=8YFLogxK
U2 - 10.1016/0920-5861(91)87025-I
DO - 10.1016/0920-5861(91)87025-I
M3 - Article
AN - SCOPUS:0026416560
VL - 8
SP - 479
EP - 490
JO - Catalysis today
JF - Catalysis today
SN - 0920-5861
IS - 4
ER -