Hydrogen gas generation by splitting aqueous water using n-type GaN photoelectrode with anodic oxidation

Hydrogen gas generation from a counterelectrode was clearly observed for the first time using light-illuminated n-type GaN as a working photoelectrode, in an electrolyte. The application of extra bias to a working electrode was required to obtain a sufficient volume of generated gas. The reactions at the GaN photoelectrode were both GaN decomposition and water oxiclization, simultaneously.