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Characterization of coprecipitated nickel on silica methanation catalysts by x-ray photoelectron spectroscopy

Journal Article · · J. Catal.; (United States)
An x-ray photoemission spectroscopy study of a series of standard nickel compounds (Ni, NiO, Ni(OH)/sub 2/, NiSiO/sub 3/) and silica-supported nickel methanation catalysts has been conducted. The binding energies and spectral shapes of the standard samples provide a data base which has been used to understand the catalyst spectra. The activity and thermal stability of coprecipitated nickel catalysts has been attributed to the metal-support interaction. This interaction has been observed in two coprecipitated nickel-on-silica catalysts. The nickel spectra closely resemble those of amorphous NiSiO/sub 3/. The interaction varies somewhat between the two catalysts studied as evidenced by differences in their reducibility. 6 figures, 4 tables.
Research Organization:
Univ. of Kentucky, Lexington
OSTI ID:
6295828
Journal Information:
J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 56:3; ISSN JCTLA
Country of Publication:
United States
Language:
English