[Amadeo]

A research group headed by Professor of Electrical Engineering Craig Grimes at Penn State University is developing an inexpensive and easily scalable technique for water photoelectrolysis—the splitting of water into hydrogen and oxygen using light energy.

[The_Victor]

The headline doesn't mention the rather necessary ingredient of H₂O for actually being the source of hydrogen. Based upon the headline one would be left to assume that the process is some kind of reverse fusion, creating matter from energy.