Poison-resistant cathode

Details Poison-resistant cathode Poison-resistant cathode

C - Chemistry, Metallurgy

25

B

117/157, 204/195

C25B 11/08 (2006.01) C25B 11/04 (2006.01)

Patent

CA 1311720

ABSTRACT A cathode suitable for use in an electrochemical process evolving hydrogen (for example the chloralkali process) in which the cathode comprises an electrically conductive substrate (1) made of a non-ferrous metal or having a coherent coating of non-ferrous metal on which is provided an electrocatalyst (4) comprising platinum and ruthenium and wherein the cathode is made more poison-resistant by a deposition of gold or silver and, optionally, a further deposition of PTFE. The cathode is particularly resistant to poisoning by iron.

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