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- W2079280107 abstract "Previously published work [1–3] done at the University of Oxford in collaboration with Imperial Chemical Industries (ICI) PLC Mond Division is summarized. Various compositions in the catalyst system KxH3−xPMo12O40·nH2O were prepared and characterized by thermal analysis, X-ray powder diffraction, MASNMR, ESR, electron microscopy, ESCA, BET surface-area measurements, and FTIR. No significant solid-solution range between H3PMo12O40·nH2O and K3PMo12O40 was detected, but evidence is presented for an epitaxial H3PMo12O40 layer on particles of K3PMo12O40 that does not decompose on calcination at 400°C. The other H3PMo12O40·nH2O phases do decompose at 400°C, first reversibly and then irreversibly to MoO3 and other products. In the compositional range 2.5≤x≤3, the exposed surface is essentially the Keggin unit, which made possible a detailed study of the reaction mechanism and its correlation with reactor studies of activity and selectivity. The epitaxial layer provides a Brønsted acidity at the surface that enhances the selectivity." @default.
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- W2079280107 date "1988-03-01" @default.
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- W2079280107 title "Acrolein oxidation over 12-molybdophosphates" @default.
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- W2079280107 doi "https://doi.org/10.1016/0167-2738(88)90019-7" @default.
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