Surface chemistry of fluoroethanols: I. A FTIR study of the reaction of 2,2-difluoroethanol on Al2O3 surface

Julia Vaynberg; L. M. Ng

doi:10.1016/j.susc.2004.12.031

Surface chemistry of fluoroethanols: I. A FTIR study of the reaction of 2,2-difluoroethanol on Al₂O₃ surface

Julia Vaynberg, L. M. Ng

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

11 Scopus citations

Abstract

The adsorption and thermal decomposition of 2,2-difluoroethanol, CF ₂H-CH₂-OH, on a high-surface-area Al₂O ₃ surface were investigated by FTIR under high vacuum conditions. IR spectra have been collected in 4000-1000 cm^-1 range and spectral assignments have been made. The spectral evidence indicated that CF ₂H-CH₂-OH decomposed to form fluorinated surface ethoxide at 250 K and at 400 K and higher temperatures, surface ethoxide decomposed further with the formation of surface acetate. Surface isolated hydroxyl groups participated in the adsorption/decomposition process. A reaction mechanism is proposed.

Original language	English
Pages (from-to)	175-187
Number of pages	13
Journal	Surface Science
Volume	577
Issue number	2-3
DOIs	https://doi.org/10.1016/j.susc.2004.12.031
State	Published - 1 Mar 2005
Externally published	Yes

Keywords

Aluminum oxide
Catalysis
Fluorinated alcohols
Infrared absorption spectroscopy
Surface chemical reactions

Access to Document

10.1016/j.susc.2004.12.031

Cite this

@article{e615d01b4b9e4fd3b3a7e14b5d59871c,

title = "Surface chemistry of fluoroethanols: I. A FTIR study of the reaction of 2,2-difluoroethanol on Al2O3 surface",

abstract = "The adsorption and thermal decomposition of 2,2-difluoroethanol, CF 2H-CH2-OH, on a high-surface-area Al2O 3 surface were investigated by FTIR under high vacuum conditions. IR spectra have been collected in 4000-1000 cm-1 range and spectral assignments have been made. The spectral evidence indicated that CF 2H-CH2-OH decomposed to form fluorinated surface ethoxide at 250 K and at 400 K and higher temperatures, surface ethoxide decomposed further with the formation of surface acetate. Surface isolated hydroxyl groups participated in the adsorption/decomposition process. A reaction mechanism is proposed.",

keywords = "Aluminum oxide, Catalysis, Fluorinated alcohols, Infrared absorption spectroscopy, Surface chemical reactions",

author = "Julia Vaynberg and Ng, {L. M.}",

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journal = "Surface Science",

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T2 - I. A FTIR study of the reaction of 2,2-difluoroethanol on Al2O3 surface

AU - Vaynberg, Julia

AU - Ng, L. M.

PY - 2005/3/1

Y1 - 2005/3/1

N2 - The adsorption and thermal decomposition of 2,2-difluoroethanol, CF 2H-CH2-OH, on a high-surface-area Al2O 3 surface were investigated by FTIR under high vacuum conditions. IR spectra have been collected in 4000-1000 cm-1 range and spectral assignments have been made. The spectral evidence indicated that CF 2H-CH2-OH decomposed to form fluorinated surface ethoxide at 250 K and at 400 K and higher temperatures, surface ethoxide decomposed further with the formation of surface acetate. Surface isolated hydroxyl groups participated in the adsorption/decomposition process. A reaction mechanism is proposed.

AB - The adsorption and thermal decomposition of 2,2-difluoroethanol, CF 2H-CH2-OH, on a high-surface-area Al2O 3 surface were investigated by FTIR under high vacuum conditions. IR spectra have been collected in 4000-1000 cm-1 range and spectral assignments have been made. The spectral evidence indicated that CF 2H-CH2-OH decomposed to form fluorinated surface ethoxide at 250 K and at 400 K and higher temperatures, surface ethoxide decomposed further with the formation of surface acetate. Surface isolated hydroxyl groups participated in the adsorption/decomposition process. A reaction mechanism is proposed.

KW - Aluminum oxide

KW - Catalysis

KW - Fluorinated alcohols

KW - Infrared absorption spectroscopy

KW - Surface chemical reactions

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DO - 10.1016/j.susc.2004.12.031

M3 - Article

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EP - 187

JO - Surface Science

JF - Surface Science

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