Hydrogen production device

Abstract

The hydrogen production device of the present invention includes: a first electrode (120) including a conductive substrate (101) and a photocatalytic semiconductor layer (102); a second electrode (103) that is electrically connected to the first electrode (120) and disposed in a second region (123) opposite to a first region (122) relative to the first electrode (120), when the first region (122) is defined as a region on a side of a surface of the first electrode (120) in which the photocatalytic semiconductor layer (102) is provided; a water-containing electrolyte solution (106); and a housing (105) containing these. The first electrode (120) is provided with a through-hole (131) at a position and the second electrode (103) is provided with a through-hole (132) at a position corresponding to the position, and the through-holes form a communicating hole (130) for allowing the first region (122) and the second region (123) to communicate with each other. An ion exchange membrane (104) having substantially the same shape as the communicating hole (130) is disposed in the communicating hole (130) to close the communicating hole (130).

Dependencies are inferred from the claim text.