Oxygen, dissociation isotopic exchange

Of the remaining studies of the overall reaction between deuterium and oxygen, the measurements of the first explosion limit by Kurzius and Boudart [58], and their deduction of an expression for in the temperature range 800—1000 K, have already been discussed in Sect. 3.6.4. A shock tube study of the development of the ignition, as well as of deuterium dissociation in the presence of argon and the isotopic exchange reactions (xxiv) and (xxv)... 

The isotopic exchange with oxygen of the catalyst (for instance, oxide) involves (a) the dissociative adsorption of oxygen with the formation of adsorbed atoms or atomic ions, (b) the exchange of these adsorbed atoms or ions with oxygen ions of oxide, and (o) the desorption in form of molecules 12). 

The sur ce FT-IR stey of a nanosize aluminum nitride powder definitely brought evidence of the specific chemical composition of its first atomic layer. The unavoidable contamination, mainly by atmospheric water, implies the presence of oxygen and hydrogen in this first layer. As a result, a comparison with the alumina sur ce appeared quite reasonable. Indeed, methanol and pyridine used as probe molecules showed the same behavior on both material sur ces. The acidity of the AIN sur ce was proven by the presence of two types of Al Lewis sites. However for AIN, a specific dissociative adsorption mechanism of acidic methanol could be possibly explained by the presence of weakly basic AI3N sites. Besides, the isotopic exchange... 

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