Abstract
The study of catalytic decomposition of nitrous oxide to nitrogen and oxygen over Rh catalysts supported on various supports (USY, NaY, Al 2O 3, ZrO 2, FSM-16, CeO 2, La 2O 3) showed that the activities of Rh/Al 2O 3 and Rh/USY (ultrastable Y zeolite) catalysts were comparable to or higher than the other catalysts reported in the literatures. The catalytic activity of N 2O decomposition was sensitive not only to the Rh dispersion but also to the preparation variables such as the Rh precursors and the supports used. A pulsed N 2O experiment over a Rh/USY catalyst suggested that the catalytic N 2O decomposition occurs on oxygen-covered surface and that O 2 may be freed on collision of N 2O molecules with the adsorbed oxygen atoms.
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