The International Open Source Hydrogen On Demand Builders Network.
2 H2O(l) + 2e- --> H2 (g) + 2 OH-(aq) E o red = -0.83 V
Its reduction potential is a negative value, but in the presence of a strong reducing agent such as sodium, calcium or a metal hydride, water obliges, and the incoming electrons serve to bind diatomic hydrogen gas. Coming from two different water molecules, the two hydrogen atoms are drawn to the incoming electrons and leave their original ones behind, forming hydroxides.
H2A + 2 photons (light) → 2 e− + 2 H+ + A A can be oxygen
In last two video posted can see the miracle of chlorophill for wate oxidadion with hydrogen evolution