An Iridium-based Mercury-film Electrode Part I. Selec’iion of Substrate and Preparation
نویسنده
چکیده
A mercury-film electrode with iridium as the substrate has been developed. Various metals were considered as potential electrode substrates, but only iridium was found to possess the desirable properties as a Hg-film substrate. After testing several pretreatment procedures the recommendation is to polish with 1 pm diamond, rinse with chromic acid and cathodize at -2.0 V vs. SCE. Different deposition conditions and solutions were tested for optimizing the conditions of film formation. The use of a square-wave deposition potential and 0.1 M HCIO, as electrolyte resulted in a dramatic improvement in the formation of a stable Hg film. Finally a complete procedure is given for the formation of a stable Hg film on iridium.
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An Iridium Based Mercury Film Electrode Part Ii. Comparison of Mercury-film Electrode Behaviors: Theory versus Reality
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