Influence of the support on the state of nickel in the Ni/SiO2, Ni/ZrO2, and Ni/SO4/ZrO2 oxide systems studied by diffuse-reflectance IR spectroscopy |
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Authors: | A V Ivanov L M Kustov |
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Institution: | (1) N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 117913 Moscow, Russian Federation |
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Abstract: | The Ni/SiO2, Ni/ZrO2, and Ni/SO4/ZrO2 systems were studied by diffuse-reflectance IR spectroscopy using CO as a probe molecule. The Ni/SiO2 and Ni/ZrO2 systems are similar in properties, and the state of nickel in the Ni/ZrO2 system is determined by the specific surface area. In the Ni/SO4/ZrO2 system, the surface sulfur compounds affect substantially the state of nickel: Niδ+ species with a partial positive charge are formed due to the strong electron-acceptor properties of the sulfur compounds.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 409–413, March, 1998. |
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Keywords: | nickel silicon oxide zirconium oxide sulfate-promoted zirconium oxide metal— support interaction diffuse-reflectance IR spectroscopy |
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