According to the following documentation: http://web.mit.edu/newsoffice/2008/chem-solar-0620.html" MIT chemists Nocera, Peters and Christopher Cummins have developed a device that uses sunlight to split water into hydrogen and oxygen gases. "When sunlight strikes the artificial photosynthesis device, high-energy photons will split water into hydrogen and oxygen. One of the researchers' biggest challenges is developing inexpensive catalysts that can split water efficiently. Platinum does the job, but it is very rare and expensive, so the researchers are focusing on more abundant metals, such as iron, cobalt, nickel and manganese."- Above link Another article (link below) published two months later, by Daniel Nocera at MIT describes an ideal catalyst they developed that can be used in splitting water into hydrogen and oxygen. http://www.sciencedaily.com/releases/2008/07/080731143345.htm" "The new catalyst consists of cobalt metal, phosphate and an electrode, placed in water. When electricity — whether from a photovoltaic cell, a wind turbine or any other source — runs through the electrode, the cobalt and phosphate form a thin film on the electrode, and oxygen gas is produced." -above link the most obvious question is; since this new catalyst doesnt contain platnium, why haven't they combined these two breakthroughs and created a new solar panel that uses sunlight, combined with water and this new catalist to split into hydrogen and oxygen gas? The implementations of this are herculean! What is the problem here?