But I guess you can't split water into hydrogen and oxygen at only 84C.

Photocatalysts that can split water have been around for decades.

Gratzel was one of the first chemists to split water using light.

In order to split water into oxygen and hydrogen, we would have to supply energy.

The high temperatures necessary to split water can be achieved through the use of concentrating solar power.

How possible is it that ultraviolet light might have split water?

The green-pigmented organisms that could split water inherited the Earth.

Replies: It doesn't take a particularly high voltage to split water.

There is a threshhold voltage necessary to split water at all.

Here's the thing: it takes energy to split water into H2 and O2.