Effect of Electroplating Parameters on Microstructure of Nanocrystalline Nickel Coatings

Rashidi, A.M.; Amadeh, A.

doi:10.1016/s1005-0302(10)60013-8

Cited by 110 publications

(53 citation statements)

References 25 publications

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“…Also, it seems that incorporating of SiC and Gr in electrolyte led to increase of crystallinity degree of Ni; therefore, this indicates that SiC and Gr affected the crystallinity (samples III). e high crystallinity degree of Ni at different circumstances proposes that all of the coatings have appropriate thermal stability at high temperatures [26]. As can be seen in Figure 4(b), crystallite size of the nickel for all the coatings was less than 25 nm.…”

Section: Xrd Analysismentioning

confidence: 88%

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Influence of Surfactants on the Characteristics of Nickel Matrix Nanocomposite Coatings

Fahami

Mohsen

Ebrahimi‐Kahrizsangi

2013

ISRN Electrochemistry

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Nickel-based nanocomposite coatings were prepared from a Watts-type electrolyte containing reinforcement's particles (silicon carbide and graphite) to deposit onto the steel St-37 substrate. e electrochemical plating of the coatings in absence and presence of surfactants and reinforcements particles was carried out to optimize high quality coatings with appropriate mechanical and morphological features. e surfactants such as cetyltrimethylammonium bromide (CTAB), sodyumdodecyl sulfate (SDS), and saccharine affected electrodeposition plating and subsequently changed mechanical characteristics. Based on XRD results, the dominant phases in the absence of surfactants were nickel oxide (NiO), nickel, and silicon carbide (SiC), while the main phases in presence of surfactants were nickel (Ni) and SiC. e hardness of the resultant coatings was found to be from 332 to 593 (Hv) depending on the bath parameter and the reinforcements weight percentage (wt%) in the Ni matrix. Microscopic observations illustrated a cluster-like structure which consisted of some �ne sphere particulates with average particle size of 65-150 nm. According to elemental mapping spectra, a homogenous distribution of nickel, silicon, and carbon particles appeared into the nickel matrix coating. Finally, the experimental outcomes demonstrated that the surfactants have signi�cant in�uence on the composition of coatings, surface morphology, and mechanical properties.

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Section: Xrd Analysismentioning

confidence: 88%

“…It should be noted that the determination of optimum conditions for production of nickel coatings from the reported results is difficult because they are, in some cases, different or paradoxical. For instance, the different results have been reported about effect of reinforcement grain size into the nickel-based coatings [26].…”

Section: Introductionmentioning

confidence: 99%

Influence of Surfactants on the Characteristics of Nickel Matrix Nanocomposite Coatings

Fahami

Mohsen

Ebrahimi‐Kahrizsangi

2013

ISRN Electrochemistry

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“…The concentrations of these chemicals were 300, 30, and 30 g/L, respectively. [35] Organic additive saccharin (98%, Sigma Aldrich) was added to the base solution at the concentration of 1.9 g/L. Nickel depositions were conducted under ambient conditions with a direct current density of 11.5 § 2 mA/cm 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

Trapping polystyrene and latex nanospheres inside hollow nanostructures usingStaphylococcus aureuscells

Seo

Chen

Jahed

et al. 2015

Journal of Experimental Nanoscience

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A new methodology was developed to trap polystyrene or latex nanospheres in nanocrystalline nickel columnar nanostructures with various cross-sectional geometries. After filling the column interiors with polystyrene or latex nanospheres with diameters of »300 and 500 nm, respectively, the top openings of these small metallic nanopillars were capped with Staphylococcus aureus (S. aureus) bacterial cells. High resolution scanning electron microscopy inspection revealed that these bacterial cells were able to cover the top openings of C-shaped pillars within an hour of incubation at 37 C. Results also demonstrated that capping S. aureus adhesive strengths to the nickel structures are greater than the cell wall cohesive strengths.

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“…The electrocatalytic activity and the surface morphology of the electrodeposited nickel depend on several factors, such as electrolyte bath composition, deposition potential, current density, time, temperature, additive, pH, etc. [28,[35][36][37][38]. Different electrolytic solutions, such as sulphate, chloride, boric acid, etc., are used for nickel electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

“…The solution's pH was found to play an important role on the crystallite size. A pH in the range of 4.6 to 5.0 has been established to result in the finest crystallite size [30,37]. Ebrahimi F. et al [35], and Mustapha Boubatra et al [36] have reported that the deposit's grain size increases, due to a reduction in the nucleation rate at a high pH.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

Guchhait¹,

Paul²

2018

Port. Electrochim. Acta

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The electrocatalytic property of electrode materials is the key for getting high cell current and low overvoltage of a fuel cell from fuels electro-oxidation. The bridge between laboratory scale fuel cell development and its fully commercialization is the development of inexpensive but energetic electrode materials. The catalytic actions of an electrode substrate are strongly influenced by the morphology and the grain fineness of the deposited materials. The present investigation aims at finding the effect of electrode deposition mode viz. direct current and pulse current coating, to produce an electrodeposited substrate that can deliver the highest current in a direct ethanol fuel cell. Nickel (Ni) is one of such non precious materials which has been produced through electro synthesis by both pulse current (PC) and direct current (DC) coating. It has been found that the morphology of the deposited is highly influenced by the current density, duty cycle, electrolyte chemistry and right selection of deposition potential on the cathodic polarization curve around the Tafel lines. Electrochemical characterization has been done by cyclic voltammetry (CV), chronoamperometry (CA) and potentiodynamic polarization (PD) studies. The substrate of the electrodeposited material has also been characterized by X-Ray Diffraction analysis (XRD), Energy Dispersive X-Ray Analysis (EDXA) and Scanning Electron Microscope (SEM). It has also been found that the electro synthesis by pulse current coating at pre-selected deposition potential, right at the end of Tafel region, at 40 ºC temperature and 150 second deposition time, gives the highest delivering current of ethanol fuel oxidation.Keywords: Direct ethanol fuel cell, inexpensive Ni-electrode, direct and pulse current coating, cyclic voltammetry, XRD, EDXA, SEM.* Corresponding author. E-mail address: sujitguchhait.chem@gmail.com, dr_spaul@yahoo.com S.K. Guchhait & S. Paul / Port. Electrochim. Acta 36 (2018) 293-307 294 IntroductionThe demand for energy is growing every day, due to fast urbanization, fulfillment of our daily needs and the progress of world economy. The energy demand has been mostly fulfilled by conventional energy resources, such as coal, natural gases, etc. However, the energy harvesting from this resources creates a lot of polluting gases, hazardous substances which have a very harmful impact on global environment, leading to health hazardous problems, not acceptable to the governments of developed and developing nations. So, the production of pollution free renewable energy at an economically viable price is a huge challenge to researchers and scientists. A fuel cell, operated with renewable fuels, is such a kind of alternative technology, to produce clean renewable energy [1]. In the fuel cell, fuel is electrochemically oxidized at the electro catalytic anode surface, knocking the electrons from the fuel, and transferring them in the form of current through the electrode and current collector to the external circuit. The energy conversion efficiency, b...

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Effect of Electroplating Parameters on Microstructure of Nanocrystalline Nickel Coatings

Cited by 110 publications

References 25 publications

Influence of Surfactants on the Characteristics of Nickel Matrix Nanocomposite Coatings

Influence of Surfactants on the Characteristics of Nickel Matrix Nanocomposite Coatings

Trapping polystyrene and latex nanospheres inside hollow nanostructures usingStaphylococcus aureuscells

Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFC

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