AVS 45th International Symposium
    Surface Science Division Monday Sessions
       Session SS2-MoA

Paper SS2-MoA10
Chemisorption on and Modification of Molybdenum Carbide Surfaces

Monday, November 2, 1998, 5:00 pm, Room 309

Session: Surface Chemistry on Model Catalysts
Presenter: E. Zahidi, Université Laval, Canada
Authors: E. Zahidi, Université Laval, Canada
C. Morin, Université Laval, Canada
H. Oudghiri-Hassani, Université Laval, Canada
P.H. McBreen, Université Laval, Canada
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Early transition metal carbides and nitrides are materials that combine a wealth of desired mechanical, electrical and chemical properties. Not the least of which is their catalytic activity and their resistance to poisoning by sulfur. RAIRS, XPS and TPD data will be presented for the interaction of simple molecules with bulk molybdenum carbides. The samples studied were prepared using the method typically used to synthesize high surface area carbide catalysts. Data for isotope labelled NO, CO and ethylene reveal how the carbide carbon may be either removed, replaced or deposited. RAIRS results for the cyclic molecules, cyclopropane, cyclohexane and cyclobutanone provide insight on the ability of molybdenum carbide to activate alkane molecules. The study also reveals methods for cleaning and preparing molybdenum carbide surfaces.