Impurity modification of surface catalyzed reactions: Cyclopropane over sulfided nickel

Journal Article · Sun Apr 01 04:00:00 EST 1984 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.572532· OSTI ID:6753572

Goodman, D W

Single crystal catalysts have been used to investigate the reaction of cyclopropane with hydrogen over clean and sulfided nickel surfaces. The apparatus used in these studies allows for catalyst preparation and surface characterization in ultrahigh vacuum (UHV) with an in vacuo transfer to a second UHV chamber designed for kinetics at elevated pressures. Kinetic studies on single crystals of nickel show the hydrogenolysis of cyclopropane to methane and ethane to be structure sensitive. Significant differences in product formation rate is observed between the Ni(111) and the Ni(100) surfaces. The open (100) surface demonstrates a much higher activity toward breaking carbon--carbon bonds than does the (111) surface. The sulfiding of both the Ni(111) and the Ni(100) surfaces significantly poisons the ability of both surfaces to cleave carbon--carbon bonds whereas the hydrogenation reaction to propane is only moderately attenuated.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87175
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6753572
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 2:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
CARBON
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL BONDS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
ELEMENTS
ETHANE
HYDROCARBONS
HYDROGEN
HYDROGENATION
IMPURITIES
METALS
METHANE
NICKEL
NONMETALS
ORGANIC COMPOUNDS
PROPANE
TRANSITION ELEMENTS
ULTRAHIGH VACUUM
YIELDS