Method of oxygen electrode preparation and product thereof
AssigneeThe Dow Chemical Company
InventorGary A. Deborski
Life of this patent
Estimating the term…
Abstract
Porous electrode bodies are effectively provided with efficient internal surface deposits of manganese oxide(s) catalyst formations by decomposition in an oxidizing atmosphere at an elevated temperature of a pre-applied inorganic permanganate salt reagent (notably potassium permanganate) in order to chemically decompose the reagent to advantageous manganese oxide forms within the body pores. Exposure to a reducing environment after catalyst deposition ameliorates the provided catalyst structure by rendering therein more electrocatalytically active variations of the emplaced manganese oxides. Highly reliable and satisfactory electrode products particularly well suited for use as depolarized cathodes, especially in chlor-alkali cells, are obtained from the treatment.
Claims11
Method of providing an electrocatalytically active manganese oxide deposit on the interior pore wall surfaces of a porous metallic electrode body comprising:
- applying a stable, liquid, pyrolyzable, inorganic permanganate salt reagent to and on the interior pore walls of the metallic electrode body;
- the heating the reagent-bearing electrode in a gaseous oxidizing atmosphere to a temperature of from about 250.degree. C. to about 700.degree. C. until the reagent decomposes to manganese oxide(s) layer deposit formations on said pore walls.
Dependencies are inferred from the claim text.