Abstract
Ruthenium oxide coating on titanium was prepared by the sol–gel procedure from well-defined colloidal oxide dispersions synthesized by the microwave (MW)-assisted hydrothermal route under defined temperature and pressure heating conditions. The dispersions were characterized by dynamic light scattering (DLS) measurements and scanning electron microscopy (SEM). The electrochemical properties were analyzed as capacitive performances gained by cyclic voltammetry and electrochemical impedance spectroscopy and as the electrocatalytic activity for oxygen evolution from acid solution. The obtained dispersions were polydisperse and contained regular particles and agglomerates of increasing surface energy and decreasing particle size as the MW-assisted heating conditions were intensified. Owing to these features of the precursor dispersions, the obtained coatings had considerably improved capacitive performances and good electrocatalytic activity for oxygen evolution at high overpotentials.
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Acknowledgments
The financial support from the Ministry of Education, Science and Technological Development (project no. 172060) is acknowledged. The authors thank Dr. Uroš Lačnjevac from the Institute of Multidiscilinary Research, University of Belgrade, for the analysis on scanning electron microscope.
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This article is dedicated to Professor György Inzelt, our dear friend, on the occasion of his 70th birthday, in recognition of his numerous scientific and educational contributions to contemporary electrochemistry.
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Šekularac, G., Košević, M., Drvenica, I. et al. Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol–gel procedure. J Solid State Electrochem 20, 3115–3123 (2016). https://doi.org/10.1007/s10008-016-3343-z
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DOI: https://doi.org/10.1007/s10008-016-3343-z