a working procedure is what my heart cries forWell sir, it's pretty "cut and dry" until the NaBH4 comes into contact with moisture. That's when the whole process turns around on itself. Electrolysis is not a difficult procedure, but should you want quality equipment and decent yeilds with this you might consider contacting:
Stuart Energy Systems in Toronto, Canada
Teledyne Brown in Maryland
Proton Energy in Rocky Hill, CT, USA
Hydrogen Systems in Montreal, Quebec Canada
I would start with 1.23 V and try working up or down from there, depending of course on the scale to which you wish to attempt this. Lower voltage and longer reaction times will mean better yeilds.
I was also thinking about the controlled addition of sodium metal into the reaction as it progresses.
2Na + 2H2O ----> H2 + 2NaOH + HEAT
This would seem a viable solution as our unwanted H2O byproduct would then become our reagents of choice. Sodium metal can be difficult to obtain for some, but even the most ghetto of chemists can rig up a cell with a tin can anode and iron wire cathode to obtain sodium metal from molten NaOH, and just collect it a little at a time until they have enough.
SAFETY NOTE: Of course they would be wearing safety goggles and long sleeves
Pr(+)tium