Effect of the Anodic Titania Layer Thickness on Electrodeposition of Zinc on Ti/TiO2 from Deep Eutectic Solvent
authors Starykevich, M; Salak, AN; Ivanou, DK; Yasakau, KA; Andre, PS; Ferreira, RAS; Zheludkevich, ML; Ferreira, MGS
nationality International
journal JOURNAL OF THE ELECTROCHEMICAL SOCIETY
keywords IONIC LIQUID; CHOLINE CHLORIDE; ELECTROCHEMICAL DEPOSITION; OXIDE-FILMS; GALVANOSTATIC ANODIZATION; TIO2 FILMS; NUCLEATION; SURFACE; ALLOYS; GROWTH
abstract Zinc electrodeposition from a deep eutectic mixture of ZnCl2 and choline chloride/ethylene glycol on titanium covered by an anodic titania film of different thicknesses was studied. It was shown that thin titanium dioxide layers work as high resistive media and the rate of zinc deposition decreases with film thickness. Thicker titania layers (23 nm and higher) have opposite properties and the zinc reduction rate starts gradually increasing with thickness. This happens because at the higher voltage necessary to grow thicker anodic films they become more crystalline and consequently more conductive. There is also evidence that in deep eutectic solvent no dense organic layer forms on the titanium/titania electrodes. The application of an AC signal superimposed on a DC potential only marginally increases the amount of zinc deposited and FTIR measurements did not reveal the formation of any chemical bonds between the film and deep eutectic solvent. Zn deposition onto titanium/titania at -1.6 V is characterized by instantaneous three-dimensional nucleation mechanism, which is independent of the titania thickness. (C) 2017 The Electrochemical Society. All rights reserved.
publisher ELECTROCHEMICAL SOC INC
issn 0013-4651
isbn 1945-7111
year published 2017
volume 164
issue 2
beginning page D88
ending page D94
digital object identifier (doi) 10.1149/2.1351702jes
web of science category Electrochemistry; Materials Science, Coatings & Films
subject category Electrochemistry; Materials Science
unique article identifier WOS:000397850800038

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