ELECTRODE FOR GENERATING CHLORINE
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Dec 20, 2023
filing date -
Dec 22, 2022
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Abstract
Disclosed herein are an electrode for generating chlorine comprising in sequence a substrate consisting of titanium or titanium-based alloy, an intermediate layer, and a catalyst layer, and a method for generating chlorine by electrolyzing dilute salt water in an electrolytic cell comprising at least a pair of said electrodes with an anode and a cathode. The intermediate layer comprises a porous platinum coating and titanium oxide provided on the substrate, the catalyst layer, in particular, consists of 2 mol % to 24 mol % platinum, 41 mol % to 49 mol % iridium oxide, and 35 mol % to 49 mol % tantalum oxide in metal equivalent. The electrode and the method with high chlorine generation efficiency and longer life time are provided under the condition of electrolyzing dilute salt water while repeatedly switching the polarity of anode and cathode every 5 to 60 seconds at a current density of 0.05 to 0.25 A·cm−2.
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