Fascinating... TIL. There are catalyst coatings that split water directly from incident light, at (IIRC) 7-9% efficiency, avoiding need for the solar panels.

Fascinating... TIL. There are catalyst coatings that split water directly from incident light, at (IIRC) 7-9% efficiency, avoiding need for the solar panels. H2 is very insoluble in water; maybe dissolving something else helps retain it? Do the microbes fix their own nitrogen? [...] They say they use a Xanthobacter strain; X. agilis eats hydrogen and fixes nitrogen... Looks like the variety they use produces carotenes and umami too.