The 'Artificial Leaf'
An "artificial leaf" made by Daniel Nocera and his team, using a silicon solar cell with novel catalyst materials bonded to its two sides, is shown in a container of water with light (simulating sunlight) shining on it. The light generates a flow of electricity that causes the water molecules, with the help of the catalysts, to split into oxygen and hydrogen, which bubble up from the two surfaces.
Read more about this work at http://web.mit.edu/newsoffice/2011/artificial-leaf-0930.html
John McCarthy, Track Seventeen Films