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- W1998476598 abstract "Abstract The isotopic equilibration reaction of dinitrogen (28N2 +30N2 = 229N2) was studied over three Ru catalysts: stabilized Raney Ru, AlRu alloy, and Ru powder. The turnover frequency (TOF) at 588 K ranges from 10−6 to 10−6 and depends on the Al/Ru ratio and the microcrystal size of Ru. The highest TOFs are obtained over samples leached at 373 K from alloys having an atomic percent of Ru from 6 to 33. These samples have a smaller average Ru crystal size and a lower Al content, ranging from 8 to 18 mol% as measured by X-ray photoelectron spectroscopy (XPS). We also suggest that the high activity is related to strongly adsorbed nitrogen, the uptake of which exceeds hydrogen adsorption. Almost no XPS chemical shift is observed for any leached Raney Ru, whereas the Ru 3d binding energy in AlRu alloys is about 1 eV lower than that in Ru metal powder. In spite of the pronounced chemical shift, the TOF on AlRu alloy is quite low. Results suggest that structural factors are most important in this system, rather than the electronic factor that has been emphasized for supported Ru catalysts." @default.
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- W1998476598 date "1988-08-01" @default.
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- W1998476598 title "Isotopic equilibration reaction of dinitrogen over raney ruthenium: Importance of the structural factor" @default.
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- W1998476598 doi "https://doi.org/10.1016/0021-9517(88)90162-5" @default.
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