Investigation of the interaction of water and of saturated hydrocarbons with the (110) surface of iridium

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5556008

Wittrig, T S

The interactions of the reconstructed iridium (110) (1 x 2) surface with water and with saturated hydrocarbons have been studied in a ultrahigh vacuum environment. The techniques of thermal desorption mass spectroscopy, ultrahigh photoelectron spectroscopy, X-ray photoelectron spectroscopy, contact potential difference measurements, and low-energy electron diffraction were utilized. Water was observed to dissociate to hydroxyl groups when adsorbed on the surface with preadsorbed oxygen, and to exhibit four distinct thermal desorption states on a clean surface. Ethane, propane, cyclopropane, isobutane, and neopentane apparently dissociate to hydrogen and dehydrogenated hydrocarbon fragments; however, only the initial species were found to desorb from the surface. The dissociation reaction was poisoned by the presence of adsorbed hydrogen.

• OSTI ID: 5556008
• Country of Publication: United States
• Language: English

Related Subjects

2-2-DIMETHYLPROPANE
2-METHYLBUTANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
ALKANES
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COHERENT SCATTERING
DATA
DIFFRACTION
DISSOCIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ETHANE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INFORMATION
IRIDIUM
KINETICS
LOW TEMPERATURE
MASS SPECTRA
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
POISONING
PRESSURE DEPENDENCE
PROPANE
RADICALS
REACTION INTERMEDIATES
REACTION KINETICS
SCATTERING
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
ULTRAHIGH VACUUM
WATER
X-RAY DIFFRACTION