It's called water thermolosis
I read that water at about 2500C, decomposes in H2 and 1/2 O2, also if two volums of H2 burn with one volume of O2 (think at 2500C they will do this) result water.
And how does one get that water to break down into hydrogen and oxygen?
By using more energy than one gets from the energy you'll get from the hydrogen.
Now does that sound like a solution to the ENERGY problem?
An investigation of direct solar-thermal hydrogen and oxygen production from water is described. Nozzle jets and skimmers have been used for separation of the products and suppression of recombination. The dissociation of water vapor and the separation of its products was conducted in plasma-enhanced, non-equilibrium glow discharges.
SUMMARY
In this report we describe the status of our work with a solar water dissociation gas phase reactor:
Solar radiant energy was concentrated by a parabolic mirror to produce high temperatures on a nozzle inside a solar reactor fed with water vapor (steam) at low pressure, to produce hydrogen and oxygen.
* A ceramic dissociator-nozzle was used as the target (absorber) for the concentrated solar-beam image. Water vapor was fed to the hot dissociator-nozzle by a feed-ring. Expansion of the water and its dissociation products into a lower pressure region was employed to provide quenching.
* A conical skimmer was used to separate the dissociated water vapor products, hydrogen and oxygen, from the unconverted water vapor in the expanding dissociator-nozzle jet. The objective is to separate the hydrogen and oxygen products from one another before they recombine.
* The dissociator-nozzle is operated with an electrical glow discharge between the water vapor feed-ring and the nozzle inlet. In this way the steam flow field, where the radiation and convection heat transfer takes place, was populated with free electrons, ions and molecules in the excited state. The radiation absorption capture cross-section for water vapor was altered by the plasma glow discharge.
* The product gas stream (containing hydrogen, oxygen and water) from the dissociator-nozzles exhaust jet flow field was operated in a glow discharge. This affects the flow-field between the dissociator-nozzle jet and a conical-skimmer. The expanding jet flow-field downstream of the dissociator-nozzle separates the water decomposition products spatially, enriching the core of the jet flow-field with the heavier oxygen and water, and enriching the periphery of the jet flow-field with the lighter hydrogen. Transverse diffusion of hydrogen appears to be responsible for the separation.
* Progress to date includes:
*
a) Operation of the reactor for over 50 hours "on-sun" at 2600-2900 K nozzle surface temperature without failure of materials.
b) Dissociation of water and separation of hydrogen at 1 to 2 % overall efficiency (solar to hydrogen.)