Photoemission studies of oxygen adsorbed on a LiAl(110) alloy surface: Role of Li segregation

Abstract

We investigated that the effect of the number of segregated Li atoms on the rate of oxidation on a LiAl alloy surface. Oxygen molecules adsorbed on the LiAl alloy react with the surface atoms to form stable oxides. The segregated Li atoms at reconstructed surfaces (c(2 x 2) and (2 x 1)) enhance the oxidation rate and form stable LiAlO, and Li2O. The degree of enhancement of oxidation by segregated Li atoms varies as a function Of 02 exposure and annealing temperature, where the latter is directly related to the mode of surface reconstruction by Li segregation. (c) 2005 Elsevier B.V. All rights reserved.