Infrared spectroscopic study of the interaction between carbon monoxide and hydrogen on supported palladium
Preadsorbed carbon monoxide on alumina-supported palladium can be used as an indicator to examine the rearrangement of the metallic surface upon the action of hydrogen. The changes of the ir spectra from CO and Pd/Al/sub 2/O/sub 3/ when the sample is brought into contact with hydrogen show that the Pd(111) plane is formed on disordered palladium crystallites even at room temperature, probably as a result of the formation of palladium hydride. Depending on the experimental conditions a number of ir bands are observed when a mixture of CO and H/sub 2/ is passed over the catalyst. These bands are believed to belong to intermediates of carbon monoxide hydrogenation. It is suggested that the surface species is formed on palladium and after that is strongly adsorbed on alumina due to the spillover phenomenon. An attempt is made to explain the difference between the reaction pathways of methanation and methanol formation.
- Research Organization:
- Bulgarian Academy of Sciences, Sofia
- OSTI ID:
- 6748620
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 74:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
ADSORPTION
ALCOHOLS
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
INFORMATION
INFRARED SPECTRA
LOW PRESSURE
MEDIUM TEMPERATURE
METALS
METHANATION
METHANE
METHANOL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
SORPTION
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
YIELDS