[Kybosh]

Originally Posted by photon

http://gcep.stanford.edu/pdfs/hydrogen_workshop/Wu.pdf
http://en.wikipedia.org/wiki/Sodium_borohydride
http://en.wikipedia.org/wiki/Direct_...ride_fuel_cell

NaBH4 + 2H2O → NaBO2 + 4H2

The catalyst is apparently is propritary though.

Interesting, like you said though cost is an issue. I can by 2kg of sodium borohydride for about $650 for use in the lab and that isn't exactly feasible for general usage.