Abstract
AbstractWe demonstrate the possibility of preparation of a mixed metal hexacyanoferrate system, silver‐containing copper hexacyanoferrate, in the form of a thin film on glassy carbon electrode substrate. This novel microstructure is characterized using conventional cyclic voltammetry, visible absorption spectrophotometry, as well as solid‐state electrochemistry in the absence of contact with liquid electrolyte. The results imply distinct physicochemical identity of the system in comparison to silver‐free copper hexacyanoferrate. Incorporation of Ag influences the selectivity of counter‐cation transport which supports redox reactions of the modified electrode in alkali metal supporting electrolytes. Thus the Ag‐intercalated material may be considered for ion‐exchange applications. Following in situ electroanalytical determinations, based on coulometry and stripping‐like voltammetry, we postulate stoichiometries, AgICuIIFeIII(CN)6 and KAgICuIIFeIII(CN)6, for the oxidized and reduced structures.
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