A comparison of the vibrational structures of ethanol, acetic acid, and acetaldehyde adsorbed on alumina
- 15 December 1979
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 71 (12) , 4789-4798
- https://doi.org/10.1063/1.438317
Abstract
The adsorption on aluminum oxide of acetaldehyde (CH3CHO) and acetic acid (CH3COOH) has been studied by utilizing inelastic electron tunneling spectroscopy (IETS) to probe the vibrational structures of the surface species over the spectral range between 240 and 4000 cm−1. Results for temperatures between 295 and 475 K are compared with our previous IETS results for ethanol (CH3CH2OH) adsorption on alumina up to 575 K. Although all three hydrocarbons form acetate complexes with the surface under certain conditions, slight differences in bonding and structure are evident in the IET spectra. The formation of some bulk aluminum hydroxide is observed also in certain cases. Observed variations in surface concentrations, bulk hydration, and the nature of surface hydroxyl groups are related to previous experimental results. Mechanisms are substantiated for the initial adsorption and subsequent reaction of each hydrocarbon with the surface.Keywords
This publication has 33 references indexed in Scilit:
- The reaction of ethanol with an aluminum oxide surface studied by inelastic electron tunneling spectroscopyThe Journal of Chemical Physics, 1979
- Inelastic electron tunnelling spectroscopy (IETS) of carboxylic acids and related systems chemisorbed on plasma-grown aluminium oxide. Part 1.—Formic acid (HCOOH and DCOOD), acetic acid (CH3COOH, CH3COOD and CD3COOD), trifluoroacetic acid, acetic anhydride, acetaldehyde and acetylchlorideJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1979
- The decomposition of ethanol, propanol and acetic acid chemisorbed on magnesium oxideApplications of Surface Science, 1978
- Polarized i.r. spectra and Raman spectra of KH(D)(CH3COO)2Spectrochimica Acta Part A: Molecular Spectroscopy, 1976
- Effect of the second metal electrode on vibrational spectra in inelastic-electron-tunneling spectroscopyPhysical Review B, 1975
- Infrared spectra of aromatic acid halidesSpectrochimica Acta Part A: Molecular Spectroscopy, 1972
- Etudes infrarouges [20–3500 cm−1] et Raman de monocristaux isotopiques de LiCH3COO, 2H2O. Effets de temperatureSpectrochimica Acta Part A: Molecular Spectroscopy, 1972
- Vibrational spectra of organometallic compounds—II. Dialkyl- and diphenyl-thallium(III) compoundsSpectrochimica Acta Part A: Molecular Spectroscopy, 1968
- Properties of aluminium ethoxideJournal of Inorganic and Nuclear Chemistry, 1962
- Vibration Spectra and Molecular Structure VII. Further Infra-Red Studies on the Vapors of Some Carboxylic AcidsThe Journal of Chemical Physics, 1939