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Iron hexacyanoferrate films : spectroelectrochemical distinction and electrodeposition sequence of 'soluble' (K+-containing) and 'insoluble' (K+-free) Prussian Blue, and composition changes in polyelectrochromic switching
journal contribution
posted on 2013-01-22, 14:38 authored by Roger J. Mortimer, David R. RosseinskyFilms of Prussian Blue (PB) deposited by electroreduction in the absence of K + have absorbance maxima at 730 nm which narrow and shift on voltammetric cycling in KCI solution to 690 nm, these absorptions being deemed diagnostic of 'insoluble' and 'soluble' PB respectively. Spectroelectro- chemistry shows that the initial deposit even in K+ solution is invariably the insoluble form, being then converted into the soluble, irrespective of electrochemical conditions or solution composition ; this resolves several problems in the current literature. Electrochemical oxidation of PB gives continuous mixed-valence compositions up to complete oxidation ; by contrast, reduction to Prussian White involves clean conversion of one into the other at a critical potential.
History
School
- Science
Department
- Chemistry
Citation
MORTIMER, R.J. and ROSSEINSKY, D.R., 1984. Iron hexacyanoferrate films : spectroelectrochemical distinction and electrodeposition sequence of 'soluble' (K+-containing) and 'insoluble' (K+-free) Prussian Blue, and composition changes in polyelectrochromic switching. Journal of the Chemical Society, Dalton Transactions, 9, pp. 2059 - 2062Publisher
© The Royal Society of ChemistryVersion
- VoR (Version of Record)
Publication date
1984Notes
This article is closed access, it was published in the serial Journal of the Chemical Society, Dalton Transactions [© The Royal Society of Chemistry]. The definitive version is available at: http://dx.doi.org/10.1039/DT9840002059ISSN
0300-9246Publisher version
Language
- en