Water can be produced on the Moon by adding hydrogen to the lunar regolith.
When heated to 1000 degrees Celsius, iron oxide contained in the regolith reacts with the added hydrogen to produce water, which can then be split into oxygen and hydrogen again through electrolysis.1
Reduction: FeTiO3+H2 ----> Fe+TiO2+H2O
Electrolysis: 2H2O ----> 2 H2+ O2
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- G. Zhou and A. A. Mardon. 2010. LUNAR OXYGEN PRODUCTION THROUGH HYDROGEN REDUCTION AT HIGH TEMPERATURES. Annual LEAG Meeting, Lunar and Planetary Institute.
- U. Hegde et al. 2011. Hydrogen Reductio n of Lunar Regolith Simulants for Oxygen Production. NASA Scientific and Technical Information, NASA, Mar. 2010
- Hideto Yoshida et al. 2000. Experimental Study on Water Production by Hydrogen Reduction of Lunar Soil Simulant in a Fixed Bed Reactor. Second Space Resources Roundtable, Golden, USA, Nov. 2000