The O K-edge XANES was applied to the characterization of the oxygen s
pecies in the perovskite-type La1-xSrxCoO3-delta of which XPS spectra
showed the presence of at least two kinds of oxygen species. By compar
ing the PEY, TEY, and FY spectra, the pi and sigma* features of the s
urface species were successfully extracted from the complicated spectr
a. The result suggested that the surface species was anionic dioxygen
which presumably occupied the defect of the oxide.