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Researchers today (March 27, 2011) claimed one of the milestones in the drive for sustainable energy — development of the first practical artificial leaf. This Royalty-Free (micro) stock photo 'Big tree leaf texture' is created by Alex Maxim and can be licensed for your advertising, corporate, editorial or other use by clicking 'License this Image' to the right of the preview. This photo can be used as a book or e-book cover, on your company`s website, as a part of an advertising display or a poster and in many other different applications. If you would like to request more information about this particular photo, please click 'Inquire about this image' and send us your question.
Speaking at the 241st National Meeting of the American Chemical Society, they described an advanced solar cell the size of a playing card that mimics the process of photosynthesis that green plants use to convert sunlight and water into energy. The artificial leaf shows particular promise as an inexpensive source of electricity for homes of the poor in developing countries.

About the shape of a playing card but thinner, the device is fashioned from silicon, electronics and catalysts.
Placed in a single gallon of water in bright sunlight, the device could produce enough electricity to supply a house in a developing country with electricity for a day, Dr.
The hydrogen and oxygen gases would be stored in a fuel cell, which uses those two materials to produce electricity, located either on top of the house or beside it.
Nocera, who is with the Massachusetts Institute of Technology, points out that the "artificial leaf" is not a new concept. Although highly efficient at carrying out photosynthesis, Turner's device was impractical for wider use, as it was composed of rare, expensive metals and was highly unstable — with a lifespan of barely one day. It is made of inexpensive materials that are widely available, works under simple conditions, and is highly stable.

In laboratory studies, he showed that an artificial leaf prototype could operate continuously for at least 45 hours without a drop in activity.
Nocera's recent discovery of several powerful new, inexpensive catalysts, made of nickel and cobalt, that are capable of efficiently splitting water into its two components, hydrogen and oxygen, under simple conditions.
Right now, Nocera's leaf is about 10 times more efficient at carrying out photosynthesis than a natural leaf.
However, he is also optimistic that he can boost the efficiency of the artificial leaf much higher in the future.

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