Surface reactivity of strongly interacting alloys and its influence on their catalytic properties. (Volumes I and II)

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7198697

Owens, M S

This study examines the catalytic properties and structure relationships induced and controlled by surface reactivity in intermetallic compounds. The Brewer-Engel intermetallic compound system Zr/Ni was investigated to compare the surface chemistry among known ordered phases. The variation in surface composition has been correlated with bulk composition, for samples before and after reactive gas treatments at a variety of temperatures. This variation in surface composition with sample-treatment history led to an explanation for the catalytic behavior of the Zr/Ni in the hydrogenation of ethylene. Samples of known ordered phases of Zr/Ni intermetallic compounds were prepared by arc melting the elements in appropriate stoichiometries. The surface chemistry of these compounds during activation and catalytic reaction were deduced. The compounds were tested for catalytic activity in the hydrogenation of ethylene. Samples of other binary intermetallic compounds were prepared and examined to compare with the Zr/Ni intermetallics: TiNi, TiNi{sub 3}, Hf{sub 2}Ni, HfNi, Hf{sub 2}Ni{sub 7} and HfNi{sub 5}.

• Research Organization: Texas A and M Univ., College Station, TX (USA)
• OSTI ID: 7198697
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKENES
ALLOYS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
ETHYLENE
HAFNIUM ALLOYS
HYDROCARBONS
HYDROGENATION
INTERMETALLIC COMPOUNDS
NICKEL ALLOYS
ORGANIC COMPOUNDS
SURFACE PROPERTIES
TITANIUM ALLOYS
ZIRCONIUM ALLOYS