Clustering of metal atoms in organic media. 9. High-activity Ni/MgO catalysts prepared by metal vapor methods. Surface area and particle size effects

Journal Article · Mon Feb 01 00:00:00 EST 1982 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(82)90096-3· OSTI ID:5711535

Matsuo, K; Klabunde, K J

A metal vapor method was employed to prepare highly dispersed Ni metal catalysts (solvated metal atom dispersed = SMAD catalyst) supported on MgO. Compared with conventional Ni/MgO compositions, the SMAD catalysts showed much greater activities for all reactions studied (hydrogenolysis of methylcyclopentane, MCP; hydrogenation/hydrogenolysis of toluene, TOL; methanation of carbon monoxide, CO; dehydration of isopropyl alcohol, IPA). These high activities for the SMAD catalysts are attributed to the high surface area of Ni on MgO and the high percentage of this Ni in a zero-valent state (reduction degree). Conventional methods for preparing Ni/MgO catalysts did not yield nearly such favorable surface areas or reduction degrees. Nickel particle size effects were observed during hydrogenolysis studies of MCP and hydrogenation studies of TOL. These phenomena are explained by assuming the size of an active Ni particle to be largest for hydrogenolysis of MCP > hydrogenation of TOL > methanation of CO approx. = dehydrogenation of IPA. 8 figures, 2 tables.

• Research Organization: Kansas State Univ., Manhattan
• DOE Contract Number: EX-76-C-01-2211
• OSTI ID: 5711535
• Journal Information: J. Catal.; (United States), Vol. 73:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
SYNTHESIS
MAGNESIUM OXIDES
NICKEL
CATALYTIC EFFECTS
CARBON MONOXIDE
CATALYST SUPPORTS
CYCLOALKANES
DEHYDRATION
HYDROGENATION
METALS
METHANATION
ORGANIC COMPOUNDS
PARTICLE SIZE
PROPANOLS
SOLID CLUSTERS
SURFACE AREA
TOLUENE
VAPORS
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
AROMATICS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
MAGNESIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SIZE
SURFACE PROPERTIES
TRANSITION ELEMENTS
400102* - Chemical & Spectral Procedures