Carbon near edge x-ray absorption fine structure (NEXAFS) studies of ethylene adsorption on Ni(111) and Ni(110) surfaces: Implication for surface morphology insensitive reactions

Journal Article · Tue Apr 01 00:00:00 EST 1986 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.450072· OSTI ID:6082780

Sham, T K; Carr, R G

The NEXAFS of C/sub 2/H/sub 4/ adsorbed on Ni(111) and Ni(110) surfaces have been measured at room temperature under similar conditions. It is found that the structure and bonding of the surface species on both surfaces are essentially the same as that reported previously for C/sub 2/H/sub 4//Ni(111). The surface species has a ''C/sub 2/'' framework, which lies flat on the surface with a relaxed carbon--carbon bond. A di-sigma configuration is proposed for the adsorbate which would have a twofold orientation symmetry on Ni(110). The implications of the twofold orientation symmetry in the case of C/sub 2/H/sub 4//Ni(110) for the azimuthal dependence of NEXAFS and the significance of the overall observation for the surface chemistry of these crystals are discussed.

• Research Organization: Chemistry Department, Brookhaven National Laboratroy, Upton, New York 11973
• OSTI ID: 6082780
• Journal Information: J. Chem. Phys.; (United States), Vol. 84:7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ETHYLENE
ADSORPTION
NICKEL
SORPTIVE PROPERTIES
ADSORBENTS
CHEMICAL BONDS
CHEMICAL REACTIONS
FINE STRUCTURE
SYNCHROTRON RADIATION
X-RAY SPECTRA
ALKENES
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROCARBONS
METALS
ORGANIC COMPOUNDS
RADIATIONS
SORPTION
SPECTRA
SURFACE PROPERTIES
TRANSITION ELEMENTS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)