Although the problems of any large country like the USA moving to a hydrogen economy are too severe to even consider, at least without many breakthroughs in a number of fields - and in all likelihood we cannot afford H2 as even a partial solution for transportation fuel with present technology, there is one bit of bright news in hydrogen storage - titanium.
But here is the curious thing - it is not exactly a Ti-hydride, and it requires a substrate of C-60 (buckyballs) onto which Ti is "decorated" [dunno why they chose that phrasing] http://www.ncnr.nist.gov/staff/taner/h2/tubec60tihx.html http://www.ncnr.nist.gov/staff/taner/ I hope that this particular storage method is perfected soon and exceeds expectations-because there are a few regions in the World - Iceland is one - with an huge excess of heating resources, but no transportation fuel. In these countries, the hydrogen economy does make sense, and that can relieve the demand pressure for limited oil sullies - for the rest of us. There could be more of these special circumstances if thermochemical H2 from nuclear is perfected. France comes to mind, since unlike us, they have embraced nuclear (despite its problems) as being the best possible economic solution and probably ecological, as well - at least of those which are available now. Jones
