Catalytic or electrocatalytic generation of chlorine dioxide
AssigneeIndustrie De Nora S.P.A.
InventorKenneth L. Hardee
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Abstract
The present invention concerns an electrode element having a valve metal substrate, a first catalyst component applied to said substrate, said first catalyst component suitable for evolving oxygen from an aqueous solution under anodic polarization, a second catalyst component suitable for generating chlorine dioxide from a chlorate solution in acidic environment; said first and second catalyst component being electrically insulated from each other. The inventions also concern an electrolytic cell having such an electrode element and a process for the generation of chlorine dioxide on a catalyst component an electrochemical cell comprising such an electrode element.
Claims11
An electrode element consisting of an integral electrode comprising two distinct catalyst components arranged in a single piece comprising:
- a valve metal substrate, wherein the valve metal substrate is a titanium rod;
- a first catalyst component applied to said substrate, said first catalyst component suitable for evolving oxygen from an aqueous solution under anodic polarization;
- a second catalyst component suitable for generating chlorine dioxide from a chlorate solution in acidic environment, the second catalyst component is supported on a support and wrapped around the first catalyst component;
- a spacer arranged between the first catalyst component and the second catalyst component supported on the support, thereby electrically insulating from each other said first and second catalyst components.
Dependencies are inferred from the claim text.