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- W2092293382 abstract "Deuteration and hydrogenation of acrolein over Ir/Nb2O5 reduced at 473 (normal state) or 773 K (SMSI state) were investigated by kinetics and tracer techniques in order to understand chemical environments around active sites in the working state and to clarify the reaction mechanism involving electronic and geometric factors. The reaction rates for each product as a function of reduction time of catalyst together with the isotope distributions in acrolein, allyl alcohol and propanal demonstrated that deuterium dissociates only on bare metal sites (site I); propanal and 1-d1-acrolein are formed on site I, while allyl alcohol is formed on both site I and the peripheral sites of migrated NbOx islands (site II), although through the different intermediates of η2- and η4-species, respectively, and 3-d1-acrolein is formed on site II. The two active sites in SMSI state are also characterized with different surface D/H ratio around them during catalytic reaction." @default.
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- W2092293382 date "1989-01-01" @default.
- W2092293382 modified "2023-10-12" @default.
- W2092293382 title "Chemical environments around active sites and reaction mechanisms for deuterium–acrolein reaction over Ir/Nb2O5 in normal and SMSI states" @default.
- W2092293382 doi "https://doi.org/10.1039/f19898502021" @default.
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