Patent ID: 11931715
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A hydrogen gas producing apparatus, comprising:
a container portion which receives water,
a photocatalyst member placed in the container portion to be immersed in the water therein, which member has photocatalyst which generates excited electrons and positive holes when it is irradiated with light, causes a decomposition reaction of the water which decomposes water into hydrogen and oxygen and generates hydrogen gas;
a light source emitting the light which is irradiated to the photocatalyst member and induces the decomposition reaction of the water; and
a heat exchange device which conducts waste heat of the light source to the water in the container portion, wherein the heat exchange device includes components in contact with the light source;
wherein the water to be decomposed on the photocatalyst member in the container portion is warmed by the waste heat of the light source by the heat exchange device.