Gaseous-diffusion electrode and electrochemical reactor using the same
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United States of America Patent
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Jun 13, 1995
Grant Date -
N/A
app pub date -
Jul 14, 1993
filing date -
Jul 16, 1992
priority date (Note) -
Expired
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Abstract
There are provided a gaseous-diffusion electrode which can exhibit sufficient gas-supplying ability and gas-discharging ability and an excellent durability even when partly immersed in an electrolysis solution; and an electrochemical reactor using the gaseous-diffusion electrode. A porous membrane 15 which is permeable to gas but not to an electrolysis solution is fixed to the surface of the gaseous-diffusion layer 13 of a gaseous-diffusion electrode 11 obtained by joining a reaction layer 12 supporting a catalyst metal and a gaseous-diffusion layer 13 to each other, so as to cover the surface of the gaseous-diffusion layer 13. When a gas passageway member 17 serving as gas passageway to the gaseous-diffusion layer 13 is inserted between the surface of the gaseous-diffusion layer 13 and the porous membrane 15, the gas-supplying ability and the gas-discharging ability becomes greatly improved. When an electrochemical reactor is composed by immersing the thus composed gaseous-diffusion electrode partly in an electrolysis solution in a pressure vessel composed of a closed vessel, electrolysis or the like can be continuously carried out.
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