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Preparation and characterization of Ag‐intercalated copper hexacyanoferrate films on electrodes
Author(s) -
Malik Marcin A.,
Kulesza Pawel J.
Publication year - 1996
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140080203
Subject(s) - inorganic chemistry , cyclic voltammetry , copper , electrochemistry , chemistry , coulometry , glassy carbon , redox , voltammetry , electrolyte , stoichiometry , electrode , metal , organic chemistry
We 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, Ag I Cu II Fe III (CN) 6 and KAg I Cu II Fe III (CN) 6 , for the oxidized and reduced structures.