Green Technology

Thermochemical reaction produces hydrogen from water and carbon dioxide.  This process could be commercialized if paired with the carbon emissions from an existing power plant.  …

…   “The researchers designed and built a two-foot-tall prototype reactor that has a quartz window and a cavity that absorbs concentrated sunlight.

The concentrator works like the magnifying glass you used as a kid to focus the sun's rays, says Haile. 

At the heart of the reactor is a cylindrical lining of ceria.

Ceria—a metal oxide that is commonly embedded in the walls of self-cleaning ovens …”   …

Via Cal Tech: Solar Reaction Press Release.