Hydrogen sulfide decomposition

Patent Granted Disclosed is a technique which enables to decompose hydrogen sulfide and produce hydrogen with high efficiency by using a photocatalyst. Specifically disclosed are a method for processing hydrogen sulfide and a method for producing hydrogen wherein a liquid bath having a photocatalyst electrode (1) which is composed of at least a photocatalyst and another liquid bath having a metal electrode (2) is separated by a cation-exchange membrane (3), a liquid containing hydrogen sulfide or an organic matter is contained in the liquid bath having the photocatalyst electrode (1), the photocatalyst electrode (1) and the metal electrode (2) are electrically connected with each other, and the photocatalyst is exposed to light.