Sulfur poisoning of carbon monoxide adsorption on Ni(III)
CO adsorption on Ni(III) precovered with varying amounts of sulfur has been investigated using LEED, AES, flash desorption, and work function measurements. Sulfur strongly reduces CO adsorption and blocks it completely for theta/sub s/ > 0.3. Besides a single CO adsorption state observed for the clean surface flash desorption spectra reveal a second state at lower energy for theta/sub s/ > 0.1. With increasing sulfur coverage the following sequence of LEED structures is observed: p(2 x 2), (3/sup 1///sub 2/ x 3/sup 1///sub 2/) R 30/sup 0/, c(20 x 2). The latter complex pattern, already described in previous publications and attributed to a reconstructed surface, could also be obtained by additional CO adsorption onto the p(2 x 2) sulfur structure. In connection with further experimental findings it is proposed that the complex pattern results from a coincidence structure of a chemisorbed sulfur overlayer.
- Research Organization:
- Kernforschungsanlage, Juelich, Ger.
- OSTI ID:
- 6823331
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 53:3; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
ADSORPTION
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
FLUIDS
HYDROCARBONS
METALS
METHANATION
METHANE
NICKEL
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POISONING
SORPTION
SORPTIVE PROPERTIES
SULFUR
SURFACE PROPERTIES
TRANSITION ELEMENTS