Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Mech, Krzysztof; Mech, Justyna; Żabiński, Piotr; Kowalik, Remigiusz; Wojnicki, Marek

doi:10.1016/j.jelechem.2015.04.022

Cited by 14 publications

(7 citation statements)

References 41 publications

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“…Discharge of free H + ions and water decomposition increases the pH value close to the interface. This modification can shift the reduction potentials value for Ni 2+ and Ru 3+ to more positive and furthermore increase the deposition rate, as what was observed in work connected with the codeposition of Co-Ru coatings from chloride [47][48][49] and Co-Pd deposits in ammonia electrolytes [50].…”

Section: Resultssupporting

confidence: 54%

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Preparation and characterization of electrodeposited Ni-Ru alloys: morphological and catalytic study

Kutyła

Kołczyk-Siedlecka

Kwiecińska

et al. 2019

J Solid State Electrochem

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Nickel-ruthenium alloys with various compositions have been deposited by electrodeposition for the first time. Cyclic voltammetry and linear stripping voltammetry measurements show that codeposition of nickel with ruthenium is possible below the potential value of nickel reduction. High-quality alloys containing nickel and ruthenium can be plated at cathodic potentials ranging from − 0.5 to − 1.0 V vs SCE. Deposited coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). The diffractograms obtained show that an increase of nickel concentration in alloy will lead to a change in the phase composition and formation of NiRu (100) and (101) phases which is observed to be 78 mas.% Ni. SEM studies confirm the surface homogeneity and presence of small, regular grains. AFM observation allows the estimation of the real surface area of obtained alloys which increase with more negative electrodeposition potentials. Ni-Ru alloys were found to be highly electroactive in the water splitting process, which can be connected with the presence of the NiRu phase and a well-developed electroactive area.

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Section: Resultssupporting

confidence: 54%

“…Electrochemical studies Figure 1 shows the cyclic voltammetry scans obtained for ruthenium electrolytes on gold disk electrodes. According to results published by Mech on the Ru 3+ -Cl − -H 2 O, two different cathodic reactions can be observed [47]:…”

Section: Resultsmentioning

confidence: 90%

Preparation and characterization of electrodeposited Ni-Ru alloys: morphological and catalytic study

Kutyła

Kołczyk-Siedlecka

Kwiecińska

et al. 2019

J Solid State Electrochem

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“…Mech et al described in their work a mechanism of creating Co-Ru alloy coatings during electrolysis from chloride solutions [19]. The coatings were deposited on copper within potentials range from -0.5 to -0.9 V. The concentration of Ru(III) and Co(II) ions in a complexed form amounted at, respectively, 10 mM and 10-100 mM.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition of Ruthenium and Cobalt-Ruthenium Alloys From Acidic Chloride Ions Containing Baths

Kutyła¹,

Kołczyk²,

Kowalik³

et al. 2016

Archives of Metallurgy and Materials

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The article presents results of tests on potentiostatic electrodeposition of ruthenium and Co-Ru alloys.The tests applying the method of cyclic voltammetry with the use of gold disk electrode (RDE) allowed to define a potentials range in which it is possible to obtain ruthenium and its alloys with cobalt from acid chloride electrolytes. The influence of electrodeposition parameters and the electrolyte composition on the composition, morphology and structure of the obtained deposits was determined. Co-Ru alloys underwent XRD tests, an analysis with the XRF method and observations using scanning electron microscopy (SEM).

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“…The UV−vis absorption bands between 200 and 250 nm were ascribed to the aromatic rings in IL molecules, while the absorption bands appeared at 400 and 656 nm can be assigned to ligand to metal charge transfer, Cl − → Ru 3+ and Cl − → Co 2+ , respectively. 44,45 The absence of absorption In view of the above results, it was inferred that a layer of [P(C 6 H 4 -m-SO 3 ) 3 ] − ions was formed near the surface of the NPs, resulting in a negative charge sphere. For charge conservation, the IL cations were then assembled as an outside layer.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Thermoregulated Ionic Liquid-Stabilizing Ru/CoO Nanocomposites for Catalytic Hydrogenation

et al. 2020

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Catalytic hydrogenations represent fundamental processes and allow for atom-efficient and clean functional group transformations for the production of chemical intermediates and fine chemicals in chemical industry. Herein, the Ru/CoO nanocomposites have been constructed and applied as nanocatalysts for the hydrogenation of phenols and furfurals into the corresponding cyclohexanols and tetrahydrofurfuryl alcohols, respectively. The functionalized ionic liquid acted not only as a ligand for stabilizing the Ru/CoO nanocatalyst but also as a thermoregulated agent. The as-obtained nanocatalyst showed superior activity, and it could be conveniently recovered via the thermoregulating phase separation. In six recycle experiments, the catalysts maintained excellent performance. It was observed that the catalytic performance highly hinged on the molar ratio of Ru to Co in the nanocatalyst. The catalyst characterization was carried out by high-resolution transmission electron microscopy (HRTEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray photoelectron spectroscopy, X-ray diffraction, high-resolution mass spectrometry, Fourier transform infrared, nuclear magnetic resonance, and UV–vis. Especially, the characterization by HRTEM and HAADF-STEM images of the nanocatalyst demonstrated that Ru(0) and Co(II) species were distributed uniformly and the Ru and Co(II) species were close to each other. However, Co(0) was generated and an electronic transfer from Co to Ru species could occur under the hydrogenation conditions. The 13C NMR characterization indicated further that Co(II) sites were mainly responsible for phenol adsorption. Meanwhile, the adjacent electron-rich Ru(0) sites can promote H2 dissociation and favor for the sequential hydrogenation.

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Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Cited by 14 publications

References 41 publications

Preparation and characterization of electrodeposited Ni-Ru alloys: morphological and catalytic study

Preparation and characterization of electrodeposited Ni-Ru alloys: morphological and catalytic study

Electrochemical Deposition of Ruthenium and Cobalt-Ruthenium Alloys From Acidic Chloride Ions Containing Baths

Thermoregulated Ionic Liquid-Stabilizing Ru/CoO Nanocomposites for Catalytic Hydrogenation

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