Effects of adsorbed oxygen containing molecules on the XANES of Pt in supported Pt/SiO2 catalysts

A. Jentys; M. Englisch; G.L. Haller; J.A. Lercher

doi:10.1007/BF00769482

Effects of adsorbed oxygen containing molecules on the XANES of Pt in supported Pt/SiO₂ catalysts

A. Jentys
, M. Englisch
, G.L. Haller
, J.A. Lercher

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

16 Citations (Scopus)

Abstract

The variation of the X-ray absorption coefficient above the Pt-LIII edge after adsorption of crotonaldehyde, butyraldehyde, crotylalcohol and butanol on a Pt/SiO2 catalyst was studied by means of X-ray absorption spectroscopy. The adsorption of these molecules caused the intensity of the white line to decrease in the order CrHO>CrOH∼BuHO≫>BuOH. From this we concluded that adsorbed unsaturated compounds donate electrons from their double bonds to Pt. The magnitude of the observed effects was approximately equal for the C=O and the C=C group. Over the Pt/SiC2 catalysts studied, crotonaldehyde was concluded to be adsorbed via both double bonds. The interaction of the free electron pairs of the oxygen was concluded to be significantly weaker than the interaction of the electrons in the π-bonds.

Original language	English
Pages (from-to)	303-308
Number of pages	6
Journal	Catalysis letters
Volume	21
DOIs	https://doi.org/10.1007/BF00769482
Publication status	Published - 1993
Externally published	Yes

Keywords

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10.1007/BF00769482

Cite this

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title = "Effects of adsorbed oxygen containing molecules on the XANES of Pt in supported Pt/SiO2 catalysts",

abstract = "The variation of the X-ray absorption coefficient above the Pt-LIII edge after adsorption of crotonaldehyde, butyraldehyde, crotylalcohol and butanol on a Pt/SiO2 catalyst was studied by means of X-ray absorption spectroscopy. The adsorption of these molecules caused the intensity of the white line to decrease in the order CrHO>CrOH∼BuHO≫>BuOH. From this we concluded that adsorbed unsaturated compounds donate electrons from their double bonds to Pt. The magnitude of the observed effects was approximately equal for the C=O and the C=C group. Over the Pt/SiC2 catalysts studied, crotonaldehyde was concluded to be adsorbed via both double bonds. The interaction of the free electron pairs of the oxygen was concluded to be significantly weaker than the interaction of the electrons in the π-bonds.",

keywords = "n/a OA procedure",

author = "A. Jentys and M. Englisch and G.L. Haller and J.A. Lercher",

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doi = "10.1007/BF00769482",

language = "English",

volume = "21",

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journal = "Catalysis letters",

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T1 - Effects of adsorbed oxygen containing molecules on the XANES of Pt in supported Pt/SiO2 catalysts

AU - Jentys, A.

AU - Englisch, M.

AU - Haller, G.L.

AU - Lercher, J.A.

PY - 1993

Y1 - 1993

N2 - The variation of the X-ray absorption coefficient above the Pt-LIII edge after adsorption of crotonaldehyde, butyraldehyde, crotylalcohol and butanol on a Pt/SiO2 catalyst was studied by means of X-ray absorption spectroscopy. The adsorption of these molecules caused the intensity of the white line to decrease in the order CrHO>CrOH∼BuHO≫>BuOH. From this we concluded that adsorbed unsaturated compounds donate electrons from their double bonds to Pt. The magnitude of the observed effects was approximately equal for the C=O and the C=C group. Over the Pt/SiC2 catalysts studied, crotonaldehyde was concluded to be adsorbed via both double bonds. The interaction of the free electron pairs of the oxygen was concluded to be significantly weaker than the interaction of the electrons in the π-bonds.

AB - The variation of the X-ray absorption coefficient above the Pt-LIII edge after adsorption of crotonaldehyde, butyraldehyde, crotylalcohol and butanol on a Pt/SiO2 catalyst was studied by means of X-ray absorption spectroscopy. The adsorption of these molecules caused the intensity of the white line to decrease in the order CrHO>CrOH∼BuHO≫>BuOH. From this we concluded that adsorbed unsaturated compounds donate electrons from their double bonds to Pt. The magnitude of the observed effects was approximately equal for the C=O and the C=C group. Over the Pt/SiC2 catalysts studied, crotonaldehyde was concluded to be adsorbed via both double bonds. The interaction of the free electron pairs of the oxygen was concluded to be significantly weaker than the interaction of the electrons in the π-bonds.

KW - n/a OA procedure

U2 - 10.1007/BF00769482

DO - 10.1007/BF00769482

M3 - Article

SN - 1011-372X

VL - 21

SP - 303

EP - 308

JO - Catalysis letters

JF - Catalysis letters