Cathode for electrolytic processes

Details Cathode for electrolytic processes Cathode for electrolytic processes

C - Chemistry, Metallurgy

25

B

C25B 11/04 (2006.01)

Patent

CA 2665569

The invention relates to a cathode for electrolytic processes, particularly suitable for hydrogen evolution in chlor-alkali electrolysis, consisting of a nickel substrate provided with a coating comprising a protective zone containing palladium and a physically distinct catalytic activation containing platinum or ruthenium optionally mixed with a highly oxidising metal oxide, preferably chromium or praseodymium oxide.

L'invention concerne une cathode pour processus électrolytiques, convenant en particulier pour l'évolution de l'hydrogène dans l'électrolyse chloro-alcaline. Ladite cathode est constituée d'un substrat de nickel comportant un revêtement comprenant une zone protectrice contenant du palladium et une zone d'action catalytique physiquement distincte contenant du platine ou du ruthénium mélangés éventuellement avec un oxyde métallique hautement oxydant, de préférence de l'oxyde de chrome ou de praséodyme.

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