Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (08): 681-687.doi: 10.3866/PKU.WHXB19950803

• ARTICLE • Previous Articles     Next Articles

X-Ray Photoelectron Spectroscopy Study of LaMn1-xFexO3(x=0-1) Oxides

Yang Xiang-Guang,Liu She-Tian,Ye Xing-Kai,Wu Yue,Sheng Shi-Shan,Xiong Guo-Xing   

  1. Changchun Institute of Applied Chemistry,Academia Sincia,Changchun 130022|Dalian Institute of Chemical Physics,Academia Sinica,Dalian 116023
  • Received:1994-06-27 Revised:1994-12-06 Published:1995-08-15
  • Contact:

PDF

4701

Like

Abstract:

The redox potential, surface composition and oxygen species of a series of complex oxides LaMn1-xFexO3 (x=0-1) having perovskite structure (ABO3) have been investigated by means of XPS. The variation of binding energies referring to Mn2p and Fe 2p under different treatment offerred an obvious evidence of redox between Mn and Fe, which could be expressed as Mn4+ + Fe(3-δ)+→Mn(4-δ)+ + Fe3+. Through computer fit three kinds of adsorbed oxygen species (OⅠ, OⅡ, OⅢ) have been evaluated based on the XPS spectra of O1s. From the variation of contents of different oxygen species, it could be concluded that the redox occurring in the surface might be related with the adsorbed oxygen species OⅠ and OⅡ, furthermore the possibility of transfer of electron between adsorption site and oxygen was also discussed.

Key words: Complex oxides, XPS, Oxiation-reduction, Adsorbed oxygen species