Infrared spectra of chemisorbed molecules--5. Magnetic and infrared measurements on methane, ethane, ethylene, and acetylene adsorbed on silica-supported nickel

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(78)90037-4· OSTI ID:5135394

Erkelens, J; Woesten, W J

Magnetic measurements suggested that ethane, ethylene, and acetylene adsorbed on silica-supported nickel at 25/sup 0/C at low coverage to form NiCH=CHNi species, which were not detected by IR spectroscopy. At higher surface concentrations, ethylene and acetylene formed surface alkyl groups by self-hydrogenation of the adsorbed species, according to IR evidence. At 25/sup 0/C and high acetylene concentrations, physical adsorption, polymerization possibly to butadiene, and carbon deposition occurred. On hydrogen-covered nickel, ethylene and acetylene adsorption was accompanied by a surface reaction and a decrease in adsorbate-metal bonds. Physisorption of methane at -20/sup 0/C and carbon deposition at +25/sup 0/C were detected by the magnetic measurements, but neither methane nor ethane adsorption gave IR spectra.

• Research Organization: Unilever Res.
• OSTI ID: 5135394
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 54:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETYLENE
ADSORPTION
ALKANES
ALKENES
ALKYNES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
ELEMENTS
ETHANE
ETHYLENE
HYDROCARBONS
INFRARED SPECTRA
LOW TEMPERATURE
MAGNETIC TESTING
MATERIALS TESTING
MEDIUM TEMPERATURE
METALS
METHANE
MINERALS
NICKEL
NONDESTRUCTIVE TESTING
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TESTING
TRANSITION ELEMENTS