Gas diffusion electrode with a hydrophilic covering layer,...

Details Gas diffusion electrode with a hydrophilic covering layer,... Gas diffusion electrode with a hydrophilic covering layer,...

C - Chemistry, Metallurgy

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B

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C25B 11/06 (2006.01) C25B 1/34 (2006.01) C25B 11/00 (2006.01) C25B 11/03 (2006.01) H01M 4/86 (2006.01)

Patent

CA 1258444

-1- ABSTRACT OF THE DISCLOSURE A gas diffusion electrode for the reduction of oxygen, which contains a hydrophobic electro-catalyst layer, is described. One side of this layer is covered with a hydrophilic layer which is composed of at least one transition metal or an oxide or mixed oxide of transition metals and can also contain a current collec- tor in the form of a metal mesh to which the hydrophobic layer can be applied. For producing the gas diffusion electrode, a hydro- phobic electro-catalyst layer can first be prepared from a pulve- rulent mixture which contains the electro-catalyst and a hydro- phobic polymer, and at least one transition metal or an oxide or mixed oxide of transition metals can be applied in a finely divided form to one side of this layer and bonded to the hydro- phobic electro-catalyst layer by the application of pressure.

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