A series .of LaMnyCo1-yO3 compounds were prepared by the complexation method with citric acid. XPS was used to investigate the oxygen state in perovskite-type (ABO3) Complex okide LaMn.Co1-yO3 catalysts. The result showed that three oxygen species (α，β，β’) are present in the okides, and that the a-species is the active oxygen species in catalytical okidation.
Layered double hydroxides (LDHs) pillared with heteropolyanions have been measured using XPS、IR、XRD spertra, and the interaction between layers and pillars discussed, The mechanism of pillars has been further discussed by XPS spectra.
