X-ray absorption spectroscopy of small chromium oxide particles (Cr2O3, CrO2) supported on titanium dioxide

Th Schedel-Niedrig; Th Neisius; C. T. Simmons; K. Köhler

doi:10.1021/la960261f

X-ray absorption spectroscopy of small chromium oxide particles (Cr₂O₃, CrO₂) supported on titanium dioxide

Th Schedel-Niedrig, Th Neisius, C. T. Simmons, K. Köhler

Associate Professorship of Inorganic Chemistry

Abteilung Physikalische Chemie

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

14 Scopus citations

Abstract

The oxygen 1s X-ray absorption near-edge structure spectra were obtained for chromium(III) oxide, Cr₂O₃, and chromium(IV) dioxide, CrO₂, supported on titania, TiO₂, as well as for the bulk crystalline materials and, for comparison, for a chromium(VI) compound K₂Cr₂O₇. The spectra exhibit a sharp split White line (WL) at about 533.5 eV near threshold. This structure can be explained in terms of ligand-field and exchange splitting. A peak (shoulder) due to the O(1s) → O(2p)Cr(3d) (spin-up t_2g) transition could only be observed in the spectra of CrO₂. The shape of the WL depends strongly on the oxidation state of the chromium ions in the probed samples suggesting that the WL can be used as an indicator of different environments in the supported chromium oxide films.

Original language	English
Pages (from-to)	6377-6381
Number of pages	5
Journal	Langmuir
Volume	12
Issue number	26
DOIs	https://doi.org/10.1021/la960261f
State	Published - 25 Dec 1996

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title = "X-ray absorption spectroscopy of small chromium oxide particles (Cr2O3, CrO2) supported on titanium dioxide",

abstract = "The oxygen 1s X-ray absorption near-edge structure spectra were obtained for chromium(III) oxide, Cr2O3, and chromium(IV) dioxide, CrO2, supported on titania, TiO2, as well as for the bulk crystalline materials and, for comparison, for a chromium(VI) compound K2Cr2O7. The spectra exhibit a sharp split White line (WL) at about 533.5 eV near threshold. This structure can be explained in terms of ligand-field and exchange splitting. A peak (shoulder) due to the O(1s) → O(2p)Cr(3d) (spin-up t2g) transition could only be observed in the spectra of CrO2. The shape of the WL depends strongly on the oxidation state of the chromium ions in the probed samples suggesting that the WL can be used as an indicator of different environments in the supported chromium oxide films.",

author = "Th Schedel-Niedrig and Th Neisius and Simmons, {C. T.} and K. K{\"o}hler",

year = "1996",

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T1 - X-ray absorption spectroscopy of small chromium oxide particles (Cr2O3, CrO2) supported on titanium dioxide

AU - Schedel-Niedrig, Th

AU - Neisius, Th

AU - Simmons, C. T.

AU - Köhler, K.

PY - 1996/12/25

Y1 - 1996/12/25

N2 - The oxygen 1s X-ray absorption near-edge structure spectra were obtained for chromium(III) oxide, Cr2O3, and chromium(IV) dioxide, CrO2, supported on titania, TiO2, as well as for the bulk crystalline materials and, for comparison, for a chromium(VI) compound K2Cr2O7. The spectra exhibit a sharp split White line (WL) at about 533.5 eV near threshold. This structure can be explained in terms of ligand-field and exchange splitting. A peak (shoulder) due to the O(1s) → O(2p)Cr(3d) (spin-up t2g) transition could only be observed in the spectra of CrO2. The shape of the WL depends strongly on the oxidation state of the chromium ions in the probed samples suggesting that the WL can be used as an indicator of different environments in the supported chromium oxide films.

AB - The oxygen 1s X-ray absorption near-edge structure spectra were obtained for chromium(III) oxide, Cr2O3, and chromium(IV) dioxide, CrO2, supported on titania, TiO2, as well as for the bulk crystalline materials and, for comparison, for a chromium(VI) compound K2Cr2O7. The spectra exhibit a sharp split White line (WL) at about 533.5 eV near threshold. This structure can be explained in terms of ligand-field and exchange splitting. A peak (shoulder) due to the O(1s) → O(2p)Cr(3d) (spin-up t2g) transition could only be observed in the spectra of CrO2. The shape of the WL depends strongly on the oxidation state of the chromium ions in the probed samples suggesting that the WL can be used as an indicator of different environments in the supported chromium oxide films.

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U2 - 10.1021/la960261f

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X-ray absorption spectroscopy of small chromium oxide particles (Cr₂O₃, CrO₂) supported on titanium dioxide

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