Patent ID: 9447509
Filing Date: 2016-09-20
CPC Classification: C01B,C25B,H01M,Y02E

Claim Text:
1. A hydrogen producing cell which decomposes water by irradiating an optical semiconductor electrode with light to produce hydrogen, the cell comprising: a housing whose surface irradiated with light has a light-transmitting property; a separator separating a space within the housing into a first space and a second space; a counter electrode arranged in the first space; an optical semiconductor electrode arranged in the second space and formed on a conductive substrate; an electrical connection part electrically connecting the optical semiconductor electrode with the counter electrode; and an electrolyte containing water in the first space and in the second space, and the cell being provided with: an electrolyte supply hole and an electrolyte discharge hole respectively penetrating the housing, and a first hydrogen circulation hole and a second hydrogen circulation hole respectively penetrating the housing in contact with, of the first space and the second space, a space in which hydrogen is produced, wherein the electrolyte supply hole is arranged on a vertically upper side than the electrolyte discharge hole, the first hydrogen circulation hole is arranged on a vertically upper side than the electrolyte supply hole, and the second hydrogen circulation hole is arranged on a vertically upper side than the electrolyte discharge hole.