B. Shelimov, C. Naccache, M. Che
May 1, 1975
Citations
0
Influential Citations
21
Citations
Journal
Journal of Catalysis
Abstract
An attempt was made to identify the nature of the oxygen species adsorbed on V2O5 supported on silica gel using oxygen enriched with 17O. 17O2 adsorption at 77 °K on samples containing 16O2− and 16O− species resulted in the appearance of a new ESR signal with g1 = 2.007, g2 = 2.002 and g3 = 1.998 with a hyperfine splitting of 78 ± 1 Oe about g2 and in the disappearance of the O− species. The same signal can be produced by 17O2 adsorption at 77 °K on the reduced samples. This signal is tentatively identified as an O3− type complex, formed by the interaction of O− with an oxygen molecule. This assignment is in agreement with previous findings. In the case of 17O− and 17O2−, the lack of detailed hyperfine structures prevented an unambiguous analysis of the corresponding ESR spectra.