Effects of dispersion and support on adsorption, catalytic and electronic properties of cobalt/alumina Co hydrogenation catalysts

Technical Report · Sat Sep 29 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/5575665· OSTI ID:5575665

Bartholomew, C H

An investigation of the effects of surface structure, dispersion, and support on the adsorption, catalytic, and electronic properties of cobalt/alumina is described, the objectives of which were to determine (1) the effects of surface structure and metal dispersion on the adsorption and catalytic properties of cobalt and (2) the effects of direct electronic interactions between metal clusters and support, on the adsorption, catalytic and electronic properties of cobalt supported on alumina. Effects of surface structure and dispersion on the adsorption, activity/selectivity, and electronic properties of Co/W single crystal surfaces and alumina-supported cobalt were investigated in a surface investigation, lab reactor studies, TPD/TPSR studies, and a Moessbauer spectroscopy study. The structure, stability, surface electronic properties, and chemisorptive properties of vapor-deposited cobalt overlayers (0-4 ML) on W(110) and W(100) were studied by Auger electron spectroscopy, low energy electron diffraction, work function changes, and temperature programmed desorption (TPD) of cobalt, hydrogen, and carbon monoxide. The CO chemisorptive properties of the two cobalt overlayers are quite different, CO adsorption being dissociative on the W(100) surface and nondissociative on the W(110) surface; comparison of the results with those for Ni/W(100) indicate that Co/W(100) dissociates CO as a result of electronic interaction with the tungsten substrate.

• Research Organization: Brigham Young Univ., Provo, UT (United States). Catalysis Lab.
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-87ER13763
• OSTI ID: 5575665
• Report Number(s): DOE/ER/13763-2; ON: DE92010656
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON MONOXIDE
ADSORPTION
HYDROGENATION
COBALT
CATALYTIC EFFECTS
ALUMINIUM OXIDES
AUGER ELECTRON SPECTROSCOPY
CATALYSTS
LAYERS
PROGRESS REPORT
TUNGSTEN
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DOCUMENT TYPES
ELECTRON SPECTROSCOPY
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties
400201 - Chemical & Physicochemical Properties