Anode for oxygen evolution in electrolytes containing manganese and fluorides
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United States of America Patent
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Aug 15, 2000
Grant Date -
N/A
app pub date -
Sep 9, 1998
filing date -
Sep 17, 1997
priority date (Note) -
Expired
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Abstract
A new electrocatalytic coating to be applied onto a titanium matrix, suitable for oxygen evolution from acid electrolytes containing manganese and fluorides, comprising: a) an external coating for oxygen evolution at controlled potential, immune to manganese electrochemical precipitation and capable of promoting the spontaneous removal of the same during operation, consisting of ruthenium and iridium as the major components (60-85%), tin and cobalt (2-10%) and titanium and tantalum at intermediate concentrations with respect to the previous groups of components. b) an optional interlayer acting as an electroconductive system and protecting the titanium matrix against corrosion caused by fluorides, made of titanium and tantalum as the major components (<95%) and iridium (>5%) as the minor component. At least part of the above elements are in the form of oxides.
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