Abstract
An X-ray photoemission spectroscopy study of a series of standard nickel compounds (Ni, NiO, Ni(OH) 2, NiSiO 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 3. The interaction varies somewhat between the two catalysts studied as evidenced by differences in their reducibility.
Published Version
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