Urine, that's an odd one that came up lately, apparently the electrode potential for liberating hydrogen from the urea content is very very low for certain electrode compositions.
Unfortunately though you're at the mercy of the urea concentration and basically the water is so much dead weight in this system.
However, it seems like you'd get the hydrogen to run a bike a couple of miles off your morning pee, with the assistance of only a calculator sized solar cell.
Unfortunately it won't scale up too well, you don't want to be tankering 2 tons of pee behind your car to get a reasonable range.
But as a combined cycle home fuel it could have promise, could use direct solar to concentrate it.
Yes, I looked at it as an alternative to HHO ... even as a supplemental fuel you'd need gallons of pee, and a system for continuous electrolyte flow.
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I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
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