Simplest Prussian-blue deposition from ferric ferricyanide solution by a reducing Ag spot put onto an ITO substrate |
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Authors: | Ray T Barton Hassan Kellawi Frank Marken Roger J Mortimer David R Rosseinsky |
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Institution: | 1. Department of Chemistry, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK 2. Department of Chemistry, The University of Damascus, Damascus, Syria 3. Department of Chemistry, The University of Bath, Claverton Down, Bath, BA2 7AY, UK 4. School of Physics, The University of Exeter, Exeter, EX4 4QL, UK
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Abstract: | Prussian-blue (PB) film for electro-chromism can be electro-deposited on to an electrode (usually tin-doped indium oxide/glass) either directly from a PB colloid or from ferric ferricyanide in a two-electrode electro-chemical cell by applying a reductive potential. Alternatively, a “sacrificial” electron-producing silver flag electrode in the solution, when connected to the PB-receiving electrode, can effect the required reductive deposition. A silver spot, here innovatively applied as silver paint directly onto the deposition electrode, produces PB film on immersion in the iron(III)(III) solution, obviating the separate counter-electrode method. |
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