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Wednesday, May 4, 2011

Synthetic Photosynthesis?

A solar cell that could mimic photosynthesis—the process that plants use to convert sunlight and water into energy—has long been deemed impractical due to the high costs and instability of its materials. Now, a new artificial leaf that overcomes these problems has been developed by a team of researchers led by Daniel Nocera of MIT.

Powerful and inexpensive catalysts made of nickel and cobalt can split water into its component hydrogen and oxygen, with 10 times the efficiency of natural photosynthesis, according to Nocera.

To be used as a power source, the hydrogen and oxygen would be stored in fuel cells. With the artificial leaf, a single gallon of water could produce a day’s worth of electricity for one house in a developing country, Nocera reported to the American Chemical Society meeting in March. —Cynthia G. Wagner

Source: http://www.wfs.org/


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