A research team from the Tokyo Institute of Technology created the first visible-light photoanode made of titanium dioxide or TiO2 enhanced with cobalt. The anode is a key element needed to achieve affordable water splitting to produce hydrogen, a clean alternative to fossil fuel. In a paper published in the journal ACS Applied Materials & Interfaces, the researchers explain that photoelectrochemical water splitting, the process by which light energy is used to split water molecules into hydrogen and oxygen is a promising approach…