Using Solar Hydrogen in Metal Oxides as Charge-Transfer Barriers
Climate-neutral hydrogen will be a crucial fuel and raw resource in the future. Water is electrolyzed to produce hydrogen, either indirectly (using a solar panel or wind turbine to provide voltage to the electrolysis cell) or directly (using a photoelectrochemical cell, or PEC cell), where the photoelectrode itself provides the electrical energy for electrolysis.
Source: azom.com