Electrocatalytically active non-carbon metal-based anodes for al

Details Electrocatalytically active non-carbon metal-based anodes for al Electrocatalytically active non-carbon metal-based anodes for al

1998-07-30

2000-08-15

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Utilizing fused bath

205388, 205392, 205386, 204244, 204245, 204290R, 204291, 204292, 204293, 2042431, C25C 308, C25C 318, C25C 312

Patent

active

061030902

ABSTRACT:
A non-carbon, metal-based high temperature resistant anode of a cell for the production of aluminium has a metal-based substrate coated with one or more electrically conductive adherent applied layers, at least one electrically conductive layer being electrochemically active. The electrochemically active layer contains one or more electrocatalysts fostering the oxidation of oxygen ions as well as fostering the formation of biatomic molecular gaseous oxygen to inhibit ionic and/or monoatomic oxygen attack of the metal-based substrate. The electrocatalyst can be iridium, palladium, platinum, rhodium, ruthenium, silicon, tin, zinc, Mischmetal oxides and metals of the Lanthanide series. The applied layer may further comprise electrochemically active constituents from oxides, oxyfluorides, phosphides, carbides, in particular spinels such as ferrites.

REFERENCES:
patent: 4529494 (1985-07-01), Joo et al.
patent: 4956068 (1990-09-01), Nguyen et al.
patent: 5069771 (1991-12-01), Nguyen et al.
patent: 5904828 (1999-05-01), Sekhar et al.

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