There are quite a few million more to go.
Main problem is that there IS NO chemical reaction process that will produce hydrogen at anywhere near the cost of lower cost means such as electrolysis or steam reformation of natural gas.
Basically, all such process run up against the Second Law of Thermodynamics that, simply put, says that energy is lost in each stage of an energy conversion process. In ARGY's case, the energy inputs are those required to extract, refine, transport the reactants.
The amount of energy required to do that is always going to be a multiple of the amount of energy represented by the hydrogen that is generated by the process.
For real info on any variety of hydrogen and fuel cell technologies I'd suggest www.ch2bc.org an international clearinghouse for info and not associated with any company.
M