Spectroscopic study of the adsorption of C/sub 2/H/sub 4/ and C/sub 2/H/sub 2/ on a rare-earth single crystal. 2. Oxidized Gd(0001)
Journal Article
·
· J. Phys. Chem.; (United States)
The adsorption of ethylene and acetylene on a rare earth oxide surface has been studied primarily by ultraviolet photoemission and Auger electron spectroscopies. The gadolinium oxide surface is produced by exposure of the clean Gd(0001) surface at 300 K to O/sub 2/. The adsorption probability for ethylene is at least a factor of 3 and probably a factor of 100 lower than tat for acetylene on the oxidized surface at 165 K. The surface species formed upon low-temperature acetylene adsorption is identified as a molecular C/sub 2/H/sub 2/. The molecularly adsorbed C/sub 2/H/sub 2/ decomposes below a substrate temperature of 350 K, leaving carbon on the surface. These results are compared with those of a previous study of C/sub 2/H/sub 2/ and C/sub 2/H/sub 4/ adsorption on the metallic GD(0001) surface. The possible catalytic significance of the selectivity of the oxidized Gd surface toward acetylene adsorption is discussed.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge (USA)
- OSTI ID:
- 7004991
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:5; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACETYLENE
ADSORPTION
ALKENES
ALKYNES
AUGER ELECTRON SPECTROSCOPY
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ETHYLENE
EXPERIMENTAL DATA
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HYDROCARBONS
INFORMATION
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
ULTRAVIOLET RADIATION
400201* -- Chemical & Physicochemical Properties
ACETYLENE
ADSORPTION
ALKENES
ALKYNES
AUGER ELECTRON SPECTROSCOPY
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ETHYLENE
EXPERIMENTAL DATA
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HYDROCARBONS
INFORMATION
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
ULTRAVIOLET RADIATION