The Ti valence and coordination in Ti-activated sodium alanate were investigated using x-ray absorption spectroscopy. An empirical relationship was established between the Ti valence and the Ti K-edge onset based on a set of standards. A qualitative comparison of the edge fine structure suggests that the Ti is present on the surface in the form of amorphous TiAl 3. The results indicate that the formal titanium valence is zero in doped sodium alanate and nearly invariant during hydrogen cycling.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)