X-ray photoelectron-spectroscopic studies of oxygen-stabilized Ti2 Ni-type compounds Ti4M2Ox (M = Fe, Co and Ni; x = 0.5, 1) have revealed some charge transfer from the titanium to the oxygen atoms with no direct involvement of the second metallic constituent M. Limited partial ionicity is deduced from the measured core-electron binding energies, which are intermediate between the respective values for TiO2 and for the pure elements (Ti0, O2). In particular, approximate estimations of the partial charge residing on Ti are consistent with the charges derived for the oxygen atoms, and the results correlate with the TiO distance in Ti4M2O, as compared with corresponding data for other systems. The implications of the interatomic bonding for the hydrogen absorption properties of the oxygen-stabilized compounds are discussed.
|Number of pages||8|
|Journal||Journal of Electron Spectroscopy and Related Phenomena|
|State||Published - 1 Jan 1983|