Electrochemical deposition of nanocrystalline tungsten bronze films on platinum
S.V. Vakarin
, O.L. Semerikova
, A.V. Kosov
, A.A. Pankratov
, S.V. Plaksin
, I.V. Korzun
, L.A. Akashev
, Yu.P. Zaikov
- Institute of High-Temperature Electrochemistry of UB RAS, st. Akademicheskaya 20, Yekaterinburg, Russian Federation, 620990.
- Institute of Solid State Chemistry of UB RAS, st.Pervomayskaya 91, Yekaterinburg, Russian Federation, 620990.
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Nanocrystalline films of tungsten oxide bronzes with hexagonal and cubic structures have been deposited on platinum substrates by electrolysis of 0.30 K2WO4 - 0.25 Li2WO4 - 0.45 WO3 melt by a pulsed potentiostatic technique in the 700-750 º? temperature range. The thicknesses of the films obtained are shown to consist of one to several monolayers. The effects of temperature, overpotential, deposition time, and substrate structure on the deposit morphology have been studied. The detailed mechanism of the formation of tungsten bronze films with hexagonal structure on rolled (110)-textured Pt foils as substrates has been suggested. It has been also demonstrated that the hexagonal tungsten bronze films exhibit good thermal stability in a wide 20-800 º? temperature range.
[S.V. Vakarin, O.L. Semerikova, A.V. Kosov, A.A. Pankratov, S.V. Plaksin, I.V. Korzun, L.A. Akashev, Yu.P. Zaikov (2015); Electrochemical deposition of nanocrystalline tungsten bronze films on platinum Int. J. of Adv. Res. 3 (Aug). 691-700] (ISSN 2320-5407). www.journalijar.com
