Abstract
The interaction of N 2O with a Sm 2O 3 surface and the reaction of methane with surface oxygen species from N 2O decomposition were studied applying the temporal-analysis-of-product (TAP) reactor. Formation of C 2 hydrocarbons depended on the concentration of adsorbed oxygen but the overall reaction was limited by the rate of N 2O decomposition which was lower than that of the dissociative adsorption of molecular oxygen under the conditions applied. It might be assumed that the fast transformation of O or O − initially produced by dissociative adsorption of N 2O resulted in the formation of adsorbed oxygen species similar to those formed by interaction of gas-phase oxygen with the samaria surface at low temperature (908 K). Different surface processes are suggested to be responsible for the activation of these two oxidants.
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