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- W616661503 abstract "Mössbauer spectroscopy and volumetric gas phase analysis were used to study the nature of surface species formed during the decomposition of Fe(CO)5 on cleaned titania powder. The titania was pretreated so as to produce samples with different hydroxyl group and Ti3+ concentrations. It was found that the presence of Ti3+ did not affect the nature of the iron species which formed. The extent of decomposition was found to be proportional to the hydroxyl group density. On all surfaces, low temperature (383 K) decomposition led to the formation of an Fe2+ species and an Fe° species (possibly Fe(CO)2), both of which were probably associated with surface hydroxyl groups. These species were very highly dispersed on the support. High temperature decomposition (673 K) led to nearly complete conversion of the metal to the Fe2+ species. A very small fraction of the iron apparently sintered to form metallic iron particles during the high temperature treatment. Prolonged reduction of these sample in hydrogen at ca. 700 K led to the formation of small metallic iron particles (less than 9 nm in size)." @default.
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- W616661503 date "1984-04-05" @default.
- W616661503 modified "2023-10-18" @default.
- W616661503 title "Catalytic Materials: Relationship Between Structure and Reactivity" @default.
- W616661503 doi "https://doi.org/10.1021/bk-1984-0248" @default.
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