The kinetics of O surface exchange were studied for various compositions in the perovskite oxide system. In particular, the relationship between the O surface exchange coefficient and the O tracer diffusion coefficient was examined. The strong correlation between these parameters was explained in terms of O vacancies which played a major role in the surface exchange process on these materials.

Oxygen Transport in (La,Sr)(Mn,Co)O3 Perovskites - Oxygen Surface Exchange. R.A.De Souza, J.A.Kilner: Solid State Ionics, 1999, 126[1-2], 153-61