[archangelcomp]

Please, read up on the thermo laws (specifically the first) and a wonderful little thing called a perpetual motion machine. Here, quite simply:

It takes more energy to produce hydrogen through electrolysis than the hydrogen yields.

Don't even bother trying to state some idea why the previous statement is false. The laws of thermodynamics are called laws for a reason, there isn't wiggle room. There is no free energy in water...it is incredibly stable in comparison to our fossil fuels.

And no, I didn't just copy these things out of wikipedia, I've only had a year of mechanical engineering and it all is quite clear.