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

Kutyła, Dawid; Kołczyk, K.; Kowalik, Remigiusz; Żabiński, Piotr

doi:10.1515/amm-2016-0256

Cited by 8 publications

(3 citation statements)

References 21 publications

(19 reference statements)

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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: 53%

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: 53%

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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“…Cobalt and its alloys could replace platinum in the production of electrodes for hydrogen evolution process. In literature one can find several reports about electrodeposition of Co-Ru [1][2][3][4], Co-Mo [5][6][7][8][9] and Co-W [10] alloys and their catalytic activity. Electrochemical deposition of Co-Pd coatings was studied by K. Mech and co-workers [11,12].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Skibińska,

Kutyła,

Kołczyk

et al. 2018

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This work presents the studies on the electrochemical process of thin palladium layers formation onto electrodeposited cobalt coatings. The suggested methodology consists of the preparation of thick and smooth cobalt substrate via galvanostatic electrodeposition. Cobalt coatings were prepared under different cathodic current density conditions from acidic bath containing cobalt sulphate and addition of boric acid. Obtained cobalt layers were analyzed by x-ray diffraction to determine their phase composition. Freshly prepared cobalt coatings were modificated by the galvanic displacement method in PdCl 2 solution, to obtain smooth and compact Pd layer. The comparison of electrocatalytic properties of Co coatings with Co/Pd ones enabled to determine the influence of Palladium presence in cathodic deposits on the hydrogen evolution process.

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“…Improvement of catalytic efficiency can be done through creation of alloys characterized by the presence of phases of low hydrogen evolution overpotential. One of the possible solutions is the creation of platinum metal alloys with nickel or cobalt-Ni-Pd [7,8], Co-Pd [9], Co-Rh [10], and Co-Ru [11,12]-which enables to lower the content of expensive metals in the electrode while maintaining very good properties. Addition of molybdenum or tungsten allows to lower both the value of overpotential and corrosive resistance in comparison to pure Ni or Co [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Electroactive Co–B and Co–B–C Alloys for Water Splitting Process in 8 M NaOH Solutions

et al. 2017

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The aim of this work was to determine parameters of obtaining Co-B and Co-B-C alloys characterized by low overpotential in hydrogen evolution reactions. There were tests performed to examine the influence of borax and arginine concentration changes as well as the value of cathodic current intensity on the composition, morphology, synthesis current efficiency, and effectiveness of hydrogen evolution. Carbon was added to Co-B alloys to improve its properties of water decomposition in 8 M NaOH solution at 90°C. The results of the experiments confirmed a decrease in overpotential values from 48 mV/dec for Co-8.5B alloy to 33 mV/dec for Co-8.2B-9.6C alloy obtained at the highest concentration (0.1 M) of arginine in the electrolyte. It was observed that alloys of good catalytic properties featured an amorphous structure. The coatings were analyzed with the use of a scanning electron microscope (SEM) and X-ray diffraction (XRD). The content of boron was assessed based on the glow discharge spectroscopy (GDS) method, whereas carbon was analyzed with the method of adsorption spectroscopy of infrared radiation.

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

Cited by 8 publications

References 21 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

Archives of Metallurgy and Materials

Electrodeposition of Electroactive Co–B and Co–B–C Alloys for Water Splitting Process in 8 M NaOH Solutions

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