Abstract
Vanadium hexacyanoferrate (VHCF) is an electrochromic material. The deposition, characterization, and spectroelectrochemistry of films of VHCF are reported here. The electrodeposition of VHCF films is shown to involve the reduction of vanadium(V) ion in the presence of ferricyanide ion. X-ray diffraction data confirm a cubic crystal structure for VHCF, similar to that of Prussian blue. From X-ray photoelectron spectroscopy and coulometric results, coupled with other electrochemical data, we conclude that the electrochromic reaction involves only the oxidation and reduction of the iron centers in the compound
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