Manganese dioxide electrodes

Details Manganese dioxide electrodes Manganese dioxide electrodes

C - Chemistry, Metallurgy

25

C

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C25C 1/00 (2006.01) C25B 11/04 (2006.01) C25B 11/16 (2006.01) C25C 7/02 (2006.01)

Patent

CA 1077888

ABSTRACT OF THE DISCLOSURE Novel electrodes consisting essentially of a valve metal base or other electrically conductive material which is corrosion-resistant to the anodic conditions having on at least a portion of its outer surface an electrocatalytic coat- ing of .beta.-manganese dioxide chemi-deposited by thermal decom- position of an alcoholic solution of manganese nitrate which are useful in electrolysis processes in which oxygen is formed at the anode such as electrowinning of metals from sulfuric acid solution or in the electrolytic production of perchlor- ates. Also included are electrodes where the .beta.-manganese dioxide coating is activated by doping with up to 5% by weight of at least one metal of the groups IB, IIB, IVA, VA, VB, VIB, VIIB, and VIII of the Periodic Table excluding the platinum group metals, gold and silver or activated by irradi- ation of the .beta.-manganese dioxide coating and/or stabilized by the addition of up to 20% by weight of silicon dioxide, tin dioxide or .beta.-lead dioxide as a mechanical stabilizer for the coating.

261704

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