Your first example uses up metallic scrub pads as an fuel source. You already got smacked down on that absurd idea of an "economical" source of hydrogen here: http://www.democraticunderground.com/?com=view_post&forum=1127&pid=68500
Your second example requires a person to buy not only solar panels, but also all the storage equipment needed to contain PRESSURIZED hydrogen, which is not cheap. It would be far, far more economical and energy-efficient to buy an electric car that could charge directly from those solar panels. A hydrogen vehicle using that setup would mean using solar electricity to generate hydrogen (losing efficiency here) that must then be pressurized (losing more efficiency here) and finally used in a fuel cell vehicle (losing even more efficiency here).
It's like the addege that says we could feed 10X as many people on this planet if, rather than growing crops to feed to cows to get beef, we instead just eat the crops directly.
Finally, your last example is basically a gas station that SELLS hydrogen.
Yes, anyone can make hydrogen in their garage. Sufficient quantities of USEABLE, energy-efficient hydrogen? Not so much. I could probably grow a banana tree up here in Minnesota too if I invested enough time, energy and money into a fancy heated greenhouse, but that doesn't mean it's somehow more cost-effective than buying a bunch at the local grocery store for 50 cents 
Edit history
Recommendations
0 members have recommended this reply (displayed in chronological order):
= new reply since forum marked as read