Characterization of silica supported Rh-Fe catalysts by Mössbauer technique |
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| Authors: | Y Minai T Fukushima M Ichikawa T Tominaga |
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| Institution: | (1) Department of Chemistry, Faculty of Science, University of Tokyo, Hongo, Tokyo, Japan;(2) Sagami Chemical Research Center, Nishi-Ohnuma, Sagamihara, Kanagawa, Japan |
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| Abstract: | Silica supported Rh–Fe catalysts were characterized by means of in situ57Fe Mössbauer spectroscopy. The Mössbauer spectra indicated that iron on the silica support existed either as Fe/O/ in the Rh–Fe alloy or as Fe3+ in Rh–Fe metal cluster compounds. The (Fe3+/Fe/O/) ratio and Mössbauer parameters were found to depend on the (Fe/Rh) atomic ratio in the catalysts. Such dependence corresponded to the change of catalytic properties of the supported Rh–Fe catalyst with the varying (Fe/Rh) ratio. |
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