In-situ X-ray photoelectron spectroscopy study of supported gallium oxide |
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| Authors: | Alexander I. Serykh Michael D. Amiridis |
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| Affiliation: | 1. Department of Chemical Engineering, University of South Carolina, 301 Main, Columbia, SC 29208, United States;2. N.D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences, 47 Leninsky pr., 119991, Moscow, Russia |
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| Abstract: | In-situ XPS study of supported gallium oxide catalysts prepared by impregnation of different metal oxides supports (SiO2, γ-Al2O3, TiO2, and MgO) has been performed. It has been found that the formation of metallic gallium takes place upon high-temperature reduction of the catalysts in flowing hydrogen. Relative concentrations of metallic gallium were most high in the cases of alumina- and titania-supported catalysts. It was suggested that interaction of gallium oxide with a support surface favors the formation of metallic gallium upon high-temperature reduction. A possible mechanism of metallic gallium formation upon the reduction is discussed. |
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