@conference{
author = "Petrović, Nataša M. and Cvetković, Vesna S. and Jović, Vladimir D and Barudžija, Tanja and Jovićević, Jovan N.",
year = "2024",
abstract = "Transition metal oxides (TMOs) have gathered increasing attention in material science due to their good electrical,
mechanical, optical properties and great chemical and thermal stability. Among them, ruthenium oxide (RuO2), with
its excellent catalytic performances has been the subject of numerous studies. It serves as a crucial material for
electrodes in (electro)catalysis, energy storage systems, and semiconductor devices. RuO2-based catalysts have
shown good potential in many important reactions such as the low-temperature dehydrogenation of small
molecules (NH3, HCl, methanol), and have been utilized in industrial electrolysis for chlorine-alkali production [1,2].
There are numerous techniques to synthesize RuO2 [1]. In response to the challenges associated with RuO2
synthesis, and to customize the particle size and shape of RuO2, an electrochemical deposition from a new class of
non-aqueous electrolytes, namely the deep eutectic solvents (DESs), can be a good alternative. So far, there have
been recorded some attempts to electrochemically deposit ruthenium/ruthenium oxides from DES [3,4].
This study focuses on the electrochemical deposition of ruthenium oxide onto palladium working electrode from
choline chloride (ChCl): urea (1:2 ratio) DES at 80 °C with 0.01M Ru(III) ions concentration. RuCl3 was added as a
source of Ru ions in the working electrolyte. To determine the potential range available for Ru electrodeposition in
DES, cyclic voltammetry (CV) on Pd working electrode in the electrolyte containing ChCl and urea was recorded.
The potential window of electrochemical stability was between -1.2 and +0.3V vs. Pt. The electrochemical behaviour
of Ru(III) in choline chloride-urea has been investigated at palladium using cyclic voltammetry (CV) and square wave
voltammetry (SWV). The CV results showed only cathodic peaks without corresponding anodic counterparts, and
SWV was used for further investigation in order to gain a better understanding of the Ru(III) electroreduction
process. The electrochemical impedance spectroscopy (EIS) results indicate diffusion-controlled RuO2 deposition.
Relatively small deposition overpotential (-1.0 V) applied in the electrodeposition experiments, resulted in
ruthenium oxide being electrodeposited. The morphology of the obtained deposits was characterized using
scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). X-ray diffraction (XRD) analysis of
the produced particles provided conformation that the RuO2 was formed onto a palladium working substrate.",
publisher = "Serbian Chemical Society",
journal = "9th Regional Symposium on Electrochemistry - South-East Europe, Book of Abstract, 3 to 7 June, 2024, Novi Sad, Serbia",
title = "Electrochemical deposition of ruthenium oxide from deep eutectic solvent",
pages = "98-98",
doi = "10.5281/zenodo.11194247"
}
