Method of making electrodes for electrochemical cells and electr

Details Method of making electrodes for electrochemical cells and electr Method of making electrodes for electrochemical cells and electr

1992-09-04

1994-02-08

Tufariello, T. M.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating selected area

C25D 502

Patent

active

052845710

ABSTRACT:
The method of the invention deposits positively charged metal species, preferably platinum-amine, at sites where the negatively charged sulfonic acid groups of the SPE are in contact with carbon. Then an electrochemical reaction causes formation of elemental metal (platinum) particle from the metal species at these sites. Platinum localization is achieved by electro-depositing platinum from a dilute electrolyte consisting essentially of tetramine platinum (II) chloride Pt(NH.sub.3).sub.4 Cl.sub.2 electrolytes. Copper deposition is achieved by electrodepositing copper from a dilute electrolyte consisting essentially of copper sulfate.

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