Infrared identification of the low-temperature forms of ethylene adsorbed on Pt/Al/sub 2/O/sub 3/

Journal Article · Thu Sep 08 04:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100329a032· OSTI ID:6221193

Mohshin, S B; Trenary, M; Robota, H J

The authors used transmission FTIR to study the adsorption and hydrogenation of ethylene on 3% Pt/Al/sub 2/O/sub 3/ below room temperature. They find that ethylene adsorbs at least three distinct forms: a di-sigma-bonded form, a ..pi..-bonded form, and the ethylidyne species (CCH/sub 3/). Adsorption at 150 K yields primarily the di-sigma- and ..pi..-bonded forms. Upon warming ethylene to room temperature, they find that only the di-sigma-bonded form rearranges to produce ethylidyne. They have studied the hydrogenation of these three kinds of adsorbed species by following the changes in the IR spectra during hydrogenation. They find that the di-sigma and ..pi..-bonded forms react much faster with hydrogen than does ethylidyne.

• Research Organization: Univ. of Illinois, Chicago (USA)
• OSTI ID: 6221193
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ADSORPTION
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELECTRONIC STRUCTURE
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
HYDROCARBONS
HYDROGENATION
INFORMATION
INFRARED SPECTRA
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROMETERS
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS