Note on the Analysis of the Ag / Ag I Electrode Impedance
نویسنده
چکیده
Interpretation of the impedance (or admittance) spectrum of the silver/ /silver iodide electrode in aqueous solution has been amatter of dispute for some timel-4 and, considering the recent paper by Kvastek and Horvat," it stil is. There are a number of basic aspects which seem to obscure the discussion and the present note is intended to point them out explicitly. First of all, it will be useful to emphasize the distinction between electrodes consisting of pure, crystalline AgI and electrodes incorporating imperfect AgI, containing impurities. In the former case, the solid AgI will expose its intrinsic conducting properties and an AgI electrode in a solution of Ag+ or Iions will be similar to a metal ion/metal electrode. The essential charge transfer process at the AgI/solution interface is
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