Electrodes for use in electrochemical processes and method for preparing the same
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United States of America Patent
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Dec 4, 1990
Grant Date -
N/A
app pub date -
Oct 30, 1986
filing date -
Apr 12, 1985
priority date (Note) -
Expired
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Abstract
The present invention concerns electrodes for use in electrochemical processes, particularly as cathodes for hydrogen evolution in cells for the electrolysis of alkali metal halides, the electrodes comprising an electrocatalytic ceramic coating obtained by thermal deposition. Elements of the groups IB, IIB, IIIA, IVA, VA, V B; VI A; VI B and VIII are added to the solutions or dispersion of precursor compounds of electrocatalytic ceramic materials, the solutions or dispersions being thermally decomposed to obtain the coating. The surface of the doped coating thus obtained is substantially immune to poisoning by metal impurities, when the electrode according to the present invention is used as cathode in poisoned alkali solutions.
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