Scientists at the Max Planck Institute for Bioinorganic Chemistry in Mülheim, Germany have developed a promising new catalyst for splitting water using sunlight and storing the Hydrogen and oxygen produced.The team of scientists found that titanium disilicide (TiSi2) can split water using a photocatalytic process similar to photosynthesis whereby chlorophyll molecules use light energy to convert water and carbon dioxide into glucose. The semiconductor is also able to separate and store the Hydrogen and oxygen released.
Using simply the sun and no other fossil fuels to produce Hydrogen is about as clean as a method as one can find. Assuming this can be implemented on a large scale it will definitely be something that we can expect to see in the Hydrogen Future.
http://www.rsc.org/chemistryworld/News/2007/October/01100701.asp
