This may be the most economical way and easiest to make hydrogen. Carbon is easy to come by.
Might suit the more advanced experimenters with lasers.
http://revolution-green.com/2013/08/30/hydrogen-generation-laser-irradiation-carbon-powder-water/ (http://revolution-green.com/2013/08/30/hydrogen-generation-laser-irradiation-carbon-powder-water/)
rate will be critical factor,and power-consumption in the laser.this is imitation of certain giant industrial processes to produce hydrogen from coal or carbon monoxide and steam.
Reminds me of this guys plan:
http://www.energeticforum.com/renewable-energy/13458-atomic-heart-cop-300-a.html (http://www.energeticforum.com/renewable-energy/13458-atomic-heart-cop-300-a.html)