Coatings for the inhibition of undesirable oxidation in an electrochemical cell
AssigneeEltech Systems Corporation
InventorKenneth I Hardee
Life of this patent
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Abstract
A process for electroplating of metal utilizing a valve metal electrode substrate containing multiple coating layers is disclosed. A top coating layer of a valve metal oxide is applied over a first coating layer of an electrochemically active coating. The electrode may find use in an electroplating system containing organic substituents in which the consumption of the organic substituent is significantly decreased or in systems where it is desirable to suppress the oxidation of a species in an electrochemical cell.
Claims29
A process for the electroplating of a metal from an electrolyte solution in an electrolytic cell having at least one anode therein, said anode having an electrocatalytic surface coating on an anode base, and wherein said electrolytic solution contains an organic substituent, said process comprising:
- (a) forming a topcoat over the entire surface of said surface coating wherein said topcoat is one or more of a valve metal oxide, a tin oxide or combinations thereof, an oxide of the type perovskite, garnet or a glass;
- and
- (b) operating said anode in said cell such that the consumption of said organic substituent is reduced while maintaining anode potential in said cell.
A process for the electrolysis of an electrolyte containing two or more oxidizable species and that is contained in an electrolytic cell, said cell having therein at least one anode having a valve metal base, said process comprising:
- providing an electrolytic cell;
- establishing in said cell an electrolyte containing two or more oxidizable species;
- providing an anode in said cell in contact with said electrolyte which anode has a valve metal base and an electrocatalytic surface coating thereon,
- and wherein there is provided a topcoat of a ceramic material covering at least substantially the entire surface of said electrocatalytic coating wherein said ceramic material is one or more of a valve metal oxide, a tin oxide or combinations thereof, an oxide of the type perovskite or garnet or a glass;
- impressing an electric current on said anode;
- conducting the electroysis of said electrolyte;
- whereby said process reduces the oxidation of at least one of said oxidizable species.
Dependencies are inferred from the claim text.