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Low-temperature-synthesized RuO2 from acidic chloride solution for the electrode coating applications

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2017
3583.pdf (1.455Mb)
Authors
Šekularac, Gavrilo
Eraković, Sanja
Mijin, Dušan
Pavelkić, Vesna
Stevanović, Jasmina
Panić, Vladimir
article (publishedVersion)
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Abstract
For the preparation of RuO2 coatings on Ti substrate, the RuO2 was synthesized in acidic aqueous medium by simple one-step low temperature-controlled microwave (MW) irradiation. The physical composition of synthesized solid phase was analysed through particle size distribution (PSD), whereas the coating was investigated for its capacitive response and activity in oxygen evolution reaction (OER). The oxide phase was found highly polydisperse, with overlapped fractions within rather narrow particle size range and clear tendency toward agglomeration. The smallest particles and their best resolved fractions were synthesized at the temperature just above the boiling point of the reaction medium, and quite below the chloride-to-oxide conversion temperature. Consequently, the highest OER activity was registered for RuO2/Ti anodes prepared from this sample, with strong indication of different oxide structure, with respect to the electrodes prepared from samples synthesized at higher temperatur...es. However, the coatings from high temperature samples have considerably higher capacitance than those synthesized at lower temperatures. These findings can be rather correlated to the MW temperature-dependent oxide structure than to different morphology analysed through PSD.

Keywords:
electrocatalytic oxide materials / hydrothermal synthesis / microwave synthesis / electrochemical impedance spectroscopy / pseudocapacitance
Source:
Journal of the Serbian Chemical Society, 2017, 82, 6, 695-709
Publisher:
  • Srpsko hemijsko društvo, Beograd
Funding / projects:
  • Ministry of Education, Science and Technological Development of the Republic of Serbia

DOI: 10.2298/JSC161229040S

ISSN: 0352-5139

WoS: 000408085700007

Scopus: 2-s2.0-85026775611
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URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3586
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Tehnološko-metalurški fakultet

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