Title:
PRODUCTION OF HYDROGEN BY PHOTOCATALYST-ELECTROLYSIS HYBRID SYSTEM
Document Type and Number:
Japanese Patent JP3198298
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To markedly reduce an electrolytic voltage and to remarkably improve the cost and energy balance of the whole system by partially adopting a photocatalyst technology very low in cost in a technology producing hydrogen from water by electrolysis using a solar energy.
SOLUTION: This system comprises a step in which oxygen is generated from an aq. soln. containing an iron (III) ion by using a light energy and the photocatalyst, a step in which the iron (III) ion is reduced to an iron (II) ion in the presence of the photocatalyst and an electrolyzing step in which the iron (III) ion is regenerated by electrolyzing the aq. soln. containing the iron (II) ion formed in the pre-stage and the hydrogen is generated.
Inventors:
Kazuhiro Sayama
Hironori Arakawa
Kiyomi Okabe
Hitoshi Kusama
Hironori Arakawa
Kiyomi Okabe
Hitoshi Kusama
Application Number:
JP32570897A
Publication Date:
August 13, 2001
Filing Date:
November 27, 1997
Export Citation:
Assignee:
Director, AIST, Ministry of Economy, Trade and Industry
International Classes:
C01B3/04; C01B13/02; C01B3/02; C01G49/00; C25B1/00; C25B1/02; C25B1/04; (IPC1-7): C01B3/04; C25B1/04
Domestic Patent References:
| JP5188492A |
Other References:
Ａｄｖ．Ｈｙｄｒｏｇｅｎ．Ｅｎｅｒｇｙ ２（Ｈｈｄｒｏｇｅｎ Ｅｎｅｒｇｙ Ｐｒｏｇ．２）（１９８１）ｐ．６３１−６４０
Ｉｎｔ．Ｊ．Ｈｙｄｒｏｇｅｎ．Ｅｎｅｒｇｙ．８［１］（１９８３）ｐ．２３−３１
Ｉｎｔ．Ｊ．Ｈｙｄｒｏｇｅｎ．Ｅｎｅｒｇｙ．８［１］（１９８３）ｐ．２３−３１