Patent ID: 7811426
Filing Date: 2010-10-12
Classification: C25B

Abstract:
1. An oxygen evolution electrode for evolving oxygen without chlorine formation in electrolysis of aqueous solutions containing chloride ion, which is prepared by depositing an intermediate layer and an electrocatalyst layer in this order on an electroconductive substrate made of titanium; wherein the intermediate layer, which is prepared by calcination, consists of multiple oxide of an element or elements of the platinum group, Sn and Sb with the Sn/Sb cationic ratio of 1-40, in which the sum of Sn and Sb shares 90 cationic % or less of the multiple oxide and the balance is the oxide of the element or elements of the platinum group; and wherein cations of the electrocatalyst layer, which is prepared by anodic deposition, consists of 0.1-3 cationic % of Sn, 0.2-20 cationic % of Mo and/or W, and the balance of Mn.