Exchange of Oxygen Over Oxide Surfaces

Isotopic Exchange of Oxygen Over Oxide Surfaces 

The isotopic oxygen exchange reaction is a useful tool for investigating the reactivity of various oxygen species on oxide surfaces. Most studies in this area have used 02 as a source of isotopic oxygen, although other oxygen carriers such as C 02l l and have been 

Two general approaches to the study of the exchange reaction have been made namely the homomolecular reaction (e.g., [10]) and the heterol dic reaction (e.g., [11]). In the former, a mixture of 02/ 02 is scrambled over the oxide surface and in the latter, gas-phase 2 is reacted directly with the oxide itself. The former reaction leads solely to the production of 3 02  

Hargreaves JSJ Mellor IM Table 1. Isotopic composition of oxygen. 

Nuclide Atomic mass Natural abundance (%) Nuclear spin I Nuclear magnetic moment fi 

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The OJ ion plays an important role in exchange reactions over oxides through the reaction of gas-phase oxygen with 0 on the surface ... 

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