Electrochemical Behavior of Electrodeposited Prussian Blue Films on ITO Electrode: An Attractive Laboratory Experience

Garcı́a-Jareño, J.J.; Benito, D.; Navarro-Laboulais, J.; Vicente, F.

doi:10.1021/ed075p881

Cited by 42 publications

(39 citation statements)

References 6 publications

(6 reference statements)

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“…In contrast to FeCr, where a potentiostatic deposition resulted in the optically clearest films, the PB films were deposited galvanostatically at À40 mA. This was previously found to yield the most homogeneous films, 21 which we also observed. After deposition, the films were thoroughly rinsed with distilled water and subsequently dried under continuous N 2 flow.…”

Section: Introductionsupporting

confidence: 62%

Electrochromic bilayers of Prussian blue and its Cr analogue

et al. 2018

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The distinct optical absorption spectra of the two layers allowed spectroelectrochemical measurements to probe the electrochemical activity of the individual layers during the switching of the Prussian blue layer.We found that for producing layers of equal optical density, the thickness of the layers had to be different due to a difference in oscillator strength for the metal-to-metal charge-transfer transition. The films used here had a thickness of 300 AE 70 nm and 30 AE 15 nm for the FeCr and FeFe sub-layers, respectively.The colouration efficiency was found to be 147.8 AE 0.8 cm 2 C À1 for the multilayered film. These resultsshow that it is possible to obtain bilayers of Prussian blues that, with a unique optical spectral fingerprint of each sub-layer, retain the electrochromic functionality and therefore enable layer-sensitive studies of charge-transfer processes in thin film heterostructures of multifunctional materials.

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Section: Introductionsupporting

confidence: 62%

Electrochromic bilayers of Prussian blue and its Cr analogue

et al. 2018

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“…PB is reported to exist in two forms, insoluble PB (Fe 4 III [Fe II (CN) 6 ] 3 ) and soluble PB (KFe III [Fe II (CN) 6 ]) 18 . When the potential of a PB film is cycled several times in an electrolyte containing potassium, the lattice structure is converted to the soluble form 21 . After this cycling process, the reactions above can be rewritten as: 27,29 …”

Section: Resultsmentioning

confidence: 99%

Potential Modulated Attenuated Total Reflectance Spectroscopy of Prussian Blue Films on ITO

Araci¹,

Runge²,

Doherty³

et al. 2006

Israel Journal of Chemistry

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Potential modulated attenuated total reflectance (PM‐ATR) spectroscopy has been employed to study charge transfer processes in Prussian blue (PB) films deposited on indium tin oxide (ITO) electrodes. PM‐ATR is a planar waveguide‐based spectroelectrochemical technique in which the optical response of an electroactive film is measured as a function of applied potential and modulation frequency. The multiple internal reflection geometry of PM‐ATR provides a significant sensitivity advantage over the single external reflectance geometry that has been employed in most prior electroreflectance studies. The apparent electron transfer rate of PB on ITO obtained using PM‐ATR was compared to that obtained with conventional cyclic voltammetry; the respective rates, 0.33 ± 0.15 s−1 (n = 3) and 0.71 ± 0.37 s−1 (n = 10), are in good agreement.

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“…This was demonstrated by depositing Prussian Blue (Iron(II,III) hexacyanoferrate). 17 As shown in Fig. 1, deeply colored films were obtained, and Prussian Blue was homogeneously deposited onto the fibers.…”

mentioning

confidence: 97%

Electrospun antimony doped tin oxide (ATO) nanofibers as a versatile conducting matrix

Ostermann

Zieba²,

Rudolph

et al. 2011

Chem. Commun.

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Nanoparticles of ATO (antimony doped tin oxide) were used to produce thick conductive, free standing mats of nanofibers via electrospinning. These fibrous mats were incorporated into polymer films to produce a transparent conducting polymer foil. Moreover, the fiber mats can serve as porous electrodes for electrodeposition of Prussian Blue and TiO 2 and were tested in dye-sensitized solar cells.TCO (transparent conducting oxide) materials are widely used in opto-electronic applications as transparent electrodes, commonly as thin, compact films deposited on glass or quartz substrates.1,2 These TCO layers of 200-300 nm thickness possess sheet resistances typically below 20 O/& and transparencies above 85% in the visible range, making them also suitable as two-dimensional electrodes for electrochromic devices 3 and solar cells.4 TCO films with 3D porosity with pore sizes beyond 100 nm are supposed to be useful for diverse applications. As proposed by Zaban et al., a 3D TCO electrode theoretically offers advantages for electron collection in DSSCs (dye-sensitized solar cells), 5 due to a higher surface area and a shorter electron diffusion pathway to the back electrode. The practical realization of such DSSCs with TiO 2 on ITO (indium tin oxide) nanopowders 6 and nanowires generated by laser-ablation 7 showed only low conversion efficiency, but recently a more elaborate approach based on a poly(carbonate) template yielded around 4% efficiency. 8 In addition, porous TCO electrodes might prove suitable in other applications with non-conducting polymers or oxides with low intrinsic conductivities, as for example oxide cathodes for Li-batteries. Here we demonstrate a novel procedure allowing the production of ATO (antimony doped tin oxide) nanofiber mats and their usage to endow intrinsically insulating polymer films with conductivity, and as highly porous electrodes for electrodeposition and device fabrication. To the best of our knowledge, this is the first working example of a nanofiber-based ATO electrode. For ordinary TCO electrodes, typical deposition techniques are CVD and PVD (chemical and physical vapor deposition), including spray pyrolysis, PLD (pulsed laser deposition) and magnetron sputtering, resulting in compact layers. Various attempts have been made to employ sol-gel processing, yielding good transparency, but generally much lower conductivity. Main benefits of sol-gel approaches are the possibility of solution-based coating technology and the facile generation of porosity through suitable polymer templates, as demonstrated for mesoporous and macroporous ITO.10,11 An alternative concept to endow TCOs with porosity is the generation of nanofibers by electrospinning. The combination of a suitable polymer as a carrier with conventional sol-gel processing thus can be applied for the electrospinning of metal oxide fibers, including ITO. 8,15 However, for other n-type TCO materials like ATO, FTO (fluorine doped tin oxide) or AZO (aluminum doped zinc oxide) only low conductivities have been reported, even for ...

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Electrochemical Behavior of Electrodeposited Prussian Blue Films on ITO Electrode: An Attractive Laboratory Experience

Cited by 42 publications

References 6 publications

Electrochromic bilayers of Prussian blue and its Cr analogue

Electrochromic bilayers of Prussian blue and its Cr analogue

Potential Modulated Attenuated Total Reflectance Spectroscopy of Prussian Blue Films on ITO

Electrospun antimony doped tin oxide (ATO) nanofibers as a versatile conducting matrix

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