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Preparation of Thallium Hexacyanoferrate Film and Mixed‐Film Modified Electrodes with Cobalt(II) Hexacyanoferrate
Author(s) -
Chen ShenMing,
Peng KuoTzu,
Lin KuoChiang
Publication year - 2005
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.200403065
Subject(s) - thallium , cyclic voltammetry , electrochemistry , quartz crystal microbalance , inorganic chemistry , cobalt , aqueous solution , electrode , chemistry , voltammetry , electrolyte , materials science , adsorption
Thallium hexacyanoferrate films have been prepared from various aqueous electrolyte solutions using consecutive cyclic voltammetry. The cyclic voltammograms recorded the direct deposition of thallium hexacyanoferrate films from the mixing of Tl 3+ and [Fe(CN) 6 ] 3− ions from solutions of seven cations: Li + , Na + , K + , Rb + , Cs + , H + , and Tl + . An electrochemical quartz crystal microbalance (EQCM) and cyclic voltammetry were used to study the in situ growth of the thallium hexacyanoferrate films. The thallium hexacyanoferrate film shows a single redox couple with a formal potential between +0.6 V and +1.2 V, and shows a cation effect (H + , Li + , Na + , K + , Rb + , Cs + , and Tl + ). A mixed film and a two‐layered modified electrodes composed of a thallium hexacyanoferrate film with cobalt(II) hexacyanoferrate film were prepared.