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Decomposition of formic acid on copper, nickel, and copper-nickel alloys. I. Preparation and characterization of catalysts

Journal Article · · J. Catal.; (United States)
;

Copper-nickel (Cu-Ni) powders were prepared and shown to be monophasic, homogeneous alloys. Their surface composition was determined by strong hydrogen chemisorption with an assumed surface stoichiometry of 1:1 hydrogen to nickel (Ni). The surface analysis agrees with previous experimental and theoretical estimates. Ni particles supported on silica were prepared. The metal dispersion was calculated from the uptake of strongly adsorbed hydrogen with a 1:1 stoichiometry of hydrogen to Ni surface atoms. The extent of Ni reduction, determined from dioxygen uptake measurements was in excess of 80%. The titration of Cu surface atoms with oxygen (O/sub 2/) from nitrous oxide on powders and alumina-supported Cu agrees with results of BET N/sub 2/ physisorption and x-ray line-broadening, respectively, when a surface stoichiometry of 2:1 Cu to O is assumed. 5 figures, 3 tables.

Research Organization:
Stanford Univ., CA
OSTI ID:
5854883
Journal Information:
J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 81:1; ISSN JCTLA
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BINARY MIXTURES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COPPER
DATA
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
LOW PRESSURE
METALS
MINERALS
MIXTURES
NICKEL
NITROGEN
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POWDERS
PRESSURE DEPENDENCE
SAMPLE PREPARATION
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SURFACE AREA
SURFACE PROPERTIES
TRANSITION ELEMENTS