I'm working on a project (nothing really groundbreaking or exciting but I'll tell you about it if youre curious) that will produce hydrogen as part of the process. I'm going to need to re-combine the hydrogen back into water where I got it from and initially I thought I could just burn it but then I realized that a hydrogen fuel cell does exactly this and yet harvests electricity from the process.
So I'm wondering, how difficult is it to make a hydrogen fuel cell that combines hydrogen with oxygen and harvests electricity? Any DIY guides?
So far, I've got this link: http://en.wikipedia.org/wiki/Molten_carbonate_fuel_cell
At first glace, it looks kind of counter intuitive I mean, you need a molten fluid - which would presumably cost way more energy to produce than you'd ever get out of recombining hydrogen with O2 however, I realize I'm sure you could devise some way of focusing sunlight to achieve the same result.
Any other approaches?
Is there something that functions over a longer period of time as a draw back? I dont mind if the process is slow...