Structure, morphology and electrochemical properties of zinc–cobalt oxide films on AISI 304 type steel

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[1] Sulciute, Agne
[2] Baltrusaitis, Jonas
[3] Valatka, Eugenijus
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Valatka, Eugenijus (eugenijus.valatka@ktu.lt) | 1600年 / Kluwer Academic Publishers卷 / 45期
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Zn–Co oxide films were prepared by electrochemical deposition under potentiostatic conditions. The effects of synthesis conditions on structure; morphology; composition and electrochemical properties of deposited films were studied by atomic absorption spectroscopy; Fourier transform infrared; X-ray photoelectron spectroscopy; X-ray diffraction; scanning electron microscopy and photovoltammetry analysis. It has been determined that the as-deposited films are lamellar with intercalated acetate ions; consisting of ZnO and α-Co(OH)2 phases. The annealed films retain the same structure without impurities and consist of wurtzite-type ZnO and spinel-type Co3O4. The photoelectrochemical performance and the specific capacitance of the prepared electrodes were evaluated in 0.1 mol × L−1 NaOH aqueous solutions. The obtained experimental results showed that the values of specific capacitance increase with the increase in the amount of cobalt (hydr)oxide. On the contrary; the photoactivity decreases with the increase in cobalt content in the films. © 2015; Springer Science+Business Media Dordrecht;
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