Scientists at Tokyo Institute of Technology (Tokyo Tech) have demonstrated the first visible-light photoelectrochemical system for water splitting using TiO 2 enhanced with cobalt. The proposed approach is simple and represents a stepping stone in the quest to achieve affordable water splitting to produce hydrogen. A study on their work is published in ACS Applied materials & Interfaces. Photoelectrochemical water splitting, the process by which light energy is used to split water molecules into hydrogen and oxygen , is a promising approach to obtain pure hydrogen for use as an alternative clean fuel. This process is carried out in electrochemical cells that contain an anode and a cathode submerged in water, which are connected through an external circuit. At the anode, water oxidation occurs, whereby O 2 is produced by drawing energy from light waves. These waves transfer energy to the electrons of the anode material, allowing them to […]