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- W140923937 abstract "Various techniques have been used to identify the state and local environment of Ga species in Ga/H-ZSM-5 zeolite prepared by ion exchange. Small GaO(OH) particles (O∼4–5 nm) are present after synthesis at the outer surface of the zeolite, together with few isolated large particles (needles 0.5–2 μm long and 0.1–0.2 μm wide) of gallium oxide. The former are transformed upon calcination at 823 K into small Ga2O3 particles (O∼4–5 nm). Reducing/oxidising cycles at 823 K enable the migration of these Ga species into the zeolite, most likely as ion-exchanged GaO+ species. Bifunctional sites, combining zeolite acid Bronsted sites and redox GaO+ enhance the propane dehydrogenation and aromatisation performances of the Ga/H-ZSM-5 catalyst." @default.
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- W140923937 date "2003-01-01" @default.
- W140923937 modified "2023-09-27" @default.
- W140923937 title "38 Effects of reducing and oxidising pre-treatments on the state of gallium in Ga/H-ZSM-5 propane aromatisation catalysts" @default.
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- W140923937 doi "https://doi.org/10.1016/s0167-2991(03)80195-7" @default.
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