X-ray absorption spectroscopy of metal atom-substituted microporous materials

P. Behrens; J. Felsche; W. Niemann

doi:10.1016/0920-5861(91)87025-I

X-ray absorption spectroscopy of metal atom-substituted microporous materials

P. Behrens^*
, J. Felsche
, W. Niemann

^*Corresponding author for this work

Research output: Contribution to journal › Article › Research › peer review

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.

Original language	English
Pages (from-to)	479-490
Number of pages	12
Journal	Catalysis today
Volume	8
Issue number	4
DOIs	https://doi.org/10.1016/0920-5861(91)87025-I
Publication status	Published - 5 Mar 1991
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1016/0920-5861(91)87025-I

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@article{88f12c9e0b684871b461e75f27272821,

title = "X-ray absorption spectroscopy of metal atom-substituted microporous materials",

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) {\AA}. 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.",

author = "P. Behrens and J. Felsche and W. Niemann",

note = "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.",

year = "1991",

month = mar,

day = "5",

doi = "10.1016/0920-5861(91)87025-I",

language = "English",

volume = "8",

pages = "479--490",

journal = "Catalysis today",

issn = "0920-5861",

publisher = "Elsevier BV",

number = "4",

}

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 - https://www.scopus.com/pages/publications/0026416560

U2 - 10.1016/0920-5861(91)87025-I

DO - 10.1016/0920-5861(91)87025-I

M3 - Article

AN - SCOPUS:0026416560

SN - 0920-5861

VL - 8

SP - 479

EP - 490

JO - Catalysis today

JF - Catalysis today

IS - 4

ER -

X-ray absorption spectroscopy of metal atom-substituted microporous materials

Abstract

ASJC Scopus subject areas

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