Ni+Ti composite layers as cathode materials for electrolytic hydrogen evolution

Panek, J.; Serek, Andrzej; Budniok, A.; Rówiński, E.; Agiewka, E

doi:10.1016/s0360-3199(02)00055-1

Cited by 62 publications

(32 citation statements)

References 13 publications

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“…As was shown in Ref. [11], the value of E 100 is distinctly higher and value j 0 is distinctly smaller for nickel coatings in comparison with obtained composite coatings. It means that for all obtained coatings the increase in the rate of hydrogen evolution in comparison with nickel coatings was observed.…”

Section: Resultssupporting

confidence: 72%

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The influence of molybdenum and silicon on activity of Ni + W composite coatings in the hydrogen evolution reaction

Popczyk

2008

Surface & Interface Analysis

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composite coatings were obtained by electrolytic codeposition of crystalline nickel from an electrolyte containing suspension of W, Mo and Si powders. These coatings were obtained under galvanostatic conditions, at the current density of j dep. = 0.100 A cm −2 and at the temperature of 338 K. Chemical composition of obtained coatings was determined by energy dispersive X-ray spectroscopy (EDS) method. The electrochemical activity of these coatings was studied in the process of hydrogen evolution reaction (HER) from 5 M KOH solution using steady-state polarisation and electrochemical impedance spectroscopy (EIS) methods. On the basis of the results of EIS measurements, the rate constants of the HER as well as the surface roughness factor were determined. It was found that Ni + W + Mo + Si composite coatings are characterised by enhanced electrochemical activity toward hydrogen evolution as compared with Ni + W + Si and Ni + W coatings. The reason for this is connected with the presence of additional composite components (W, Mo, Si). Thus, obtained coatings may be useful in application as electrode materials for the hydrogen evolution reaction.

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Section: Resultssupporting

confidence: 72%

“…Moreover, the activity of different coatings was measured as the overpotential E 100 at the current density of 100 mA cm −2 . [4,11] The parameters j 0 and E 100 clearly indicate that Ni + W + Mo + Si coatings are characterised by higher activity towards HER than Ni + W + Si and Ni + W coatings ( Table 1). As was shown in Ref.…”

Section: Resultsmentioning

confidence: 99%

The influence of molybdenum and silicon on activity of Ni + W composite coatings in the hydrogen evolution reaction

Popczyk

2008

Surface & Interface Analysis

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“…Stirring rate 400 and 550 rpm Cathodic current density 10, 20 and 40 mA cm -2 composite layers when compared to pure Ni has been observed by others authors [3,12,13,15,16,21]. This characteristic may be related to both the large size of the Nb particles used and the significant nucleation rate of new crystals on the particle surface before it is covered by the growing surrounding Ni layer.…”

Section: Resultsmentioning

confidence: 61%

“…Ceramics (SiC [1][2][3][4][5][6], Al 2 O 3 [7,8], TiO 2 [7,9], ZrO 2 [7]), polymers (polyethylene [10], polytetrafluorethylene [11]), metals (Ti [12,13], Al [14]) and other materials (hydroxyapatite [15], diamond [16]) have been co-electrodeposited with nickel in order to improve properties, such as hardness, wear resistance, lubrication, corrosion resistance and catalytic properties. The co-deposition consists in electrolyzing a nickel plating bath containing suspended solid particles using a suitable cathode material.…”

Section: Introductionmentioning

confidence: 99%

Deposition and characterization of nickel–niobium composite electrocoatings

Robin

Fratari

2007

J Appl Electrochem

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Ni-Nb composite electrocoatings were obtained on carbon steel from Watts bath, containing suspended 20 lm size niobium powders. The effect of cathodic current density, electrolyte stirring rate and concentration of Nb particles in the bath on the deposit morphology and texture, volume fraction of co-deposited Nb particles and microhardness was investigated. The Ni-Nb composite layers presented a rough morphology with randomly oriented Ni grains, whereas pure Ni coatings obtained under the same experimental conditions were smooth and showed highly preferred orientation in the [110] or [100] direction. Stirring rate of the electrolyte and concentration of Nb particles in the bath are the main parameters affecting the incorporation of Nb particles. The Nb incorporated volume fraction was 11-14%, 17-19%, 27-32% and 34-37% for the 20 g L -1 Nb/550 rpm, 20 g L -1 Nb/400 rpm, 40 g L -1 Nb/400 rpm and 40 g L -1 Nb/550 rpm conditions, respectively. The microhardness of the Ni-Nb composite coatings obtained at 20 and 40 mA cm -2 was higher than that of pure Ni layers, due to grain refining. Incorporation of Nb particles in Ni coatings improved the corrosion resistance of the deposits in NaCl and H 2 SO 4 solutions.

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“…The results showed rough metallic coating with very good adhesion to the substrate. Panek et al [15] found that Ni-Ti composite layers exhibited greater hydrogen-evolution activities when compared to that of pure nickel coating. Both studies reported that the changes in the mechanical and chemical properties of Ni-Ti composite coatings depended on the amount of Ti particles embedded in the coatings.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings/ Morfologia I Twardość Elektrochemicznie Współosadzonych Powłok Kompozytowych Ni-Ti

Srikomol

Janetaisong

Boonyongmaneerat

et al. 2014

Archives of Metallurgy and Materials

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The effects of current density and Ti particle loading in a plating bath on the morphology and hardness of Ni-Ti composite coatings via an electrochemical-codeposition process were investigated. The Ti-reinforced Ni-matrix composite coatings were codeposited on copper substrates using a Ni-ion electrolytic solution stably suspended with -45 micron Ti particles. Within the current studied range, the coatings' Ti contents are in the range between 46 and 62 at.%. The morphology appeared to vary with current density. Structures of the Ni-Ti composite coatings produced under low current density conditions revealed denser structures, which is in contrast to the more porous structures noted in the coatings produced under high current density. An initial increase of current density from 100 to 150 mA/cm 2 also tends to raise Ti coating content. The reinforcement of Ti particles in the coatings also increased their hardness, which is attributed to the possible role of the embedded Ti particles in hindering matrix deformation. The effect of Ti loading on the coating's Ti contents was not significant under conditions used in the present study.Keywords: electrochemical codeposition, composite coatings, Nickel-Titanium, morphology, hardness Badano wpływ gęstości prądu i zawartości cząstek Ti w kąpieli galwanicznej na morfologię i twardość elektrochemicznie współosadzanych powłok kompozytowych Ni-Ti. Kompozytowe powłoki niklowe zbrojone cząstkami Ti zostały współosadzone na powierzchniach miedzianych z kąpieli elektrolitycznej zawierającej jony Ni i 45 mikronowe cząstki Ti tworzące stabilną zawiesinę. Zawartość Ti wbudowanego w powłoki wahała się w granicach 46-62 at.%. Morfologia powłok zmienia się wraz ze zmianą stosowanej gęstości prądu. W przypadku kompozytowych powłok Ni-Ti wytwarzanych przy niskich gęstościach prądu stwierdzono bardziej zwarte struktury, w przeciwieństwie do bardziej porowatych struktur stwierdzonych w przypadku powłok wytwarzanych przy wysokich gęstościach prądu. Początkowy wzrost gęstości prądu od 100 do 150 mA/cm 2 również powoduje podniesienie zawartości Ti w powłokach. Ze wzrostem zawartości Ti wzrasta również twardość powłoki, co można przypisać roli osadzonych cząstek Ti utrudniających odkształcenie osnowy. W warunkach stosowanych w tej pracy wpływ zawartości Ti w kąpieli na zawartość Ti w powłokach nie był znaczący.

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Ni+Ti composite layers as cathode materials for electrolytic hydrogen evolution

Cited by 62 publications

References 13 publications

The influence of molybdenum and silicon on activity of Ni + W composite coatings in the hydrogen evolution reaction

The influence of molybdenum and silicon on activity of Ni + W composite coatings in the hydrogen evolution reaction

Deposition and characterization of nickel–niobium composite electrocoatings

Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings/ Morfologia I Twardość Elektrochemicznie Współosadzonych Powłok Kompozytowych Ni-Ti

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