Comment by oxymoron

The reaction consumes water, which isn't exactly abundant on a space station or space vessel. You can regain the water by burning the alcohol, which can be done in a combustion chamber without reintroducing the CO2 to the air of the habitat. That's a rather exothermic reaction – and I'm guessing that the bionic leaf also generates excess heat – which might be a problem. Space vessels can only cool down by radiating heat, which I gather to be a quite complex problem. Nevertheless, it might be workable for all I know...