Electrochemical and AFM study of cobalt nucleation mechanisms on glassy carbon from ammonium sulfate solutions

Grujicic, Darko; Pešić, Batrić

doi:10.1016/j.electacta.2004.05.028

Cited by 121 publications

(70 citation statements)

References 17 publications

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“…25,27 A linear relationship was found on a semilogarithmic plot of current density vs. time in Figure 4b) which suggests tin deposition onto copper proceeded through a rapid cluster nucleation with a subsequent diffusion-limited growth. The nucleation process of tin onto copper was analysed using data from the rising part of the experimental current transient curve compared with dimensionless theoretical curves for both instantaneous and progressive nucleation according to the Scharifker-Hills equations [27][28][29][30][31][32] in Figure 4c). …”

Section: Nucleation and Growth Of Tin On Coppermentioning

confidence: 99%

A review of developments in the electrodeposition of tin

Walsh

Low

2016

Surface and Coatings Technology

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Highlights Types of aqueous electrolytes for pure tin deposits are reviewed. The many existing and developing applications of tin deposits are summarised. Emphasis is placed on versatile methanesulfonic acid electrolytes. The effects of bath composition (including additives) and operating conditions on deposit morphology are illustrated. Electrochemical studies at static and controlled flow rotating electrodes are illustrated. AbstractThe importance of tin and its electrodeposition are summarised and the scope for plating tin is outlined.Established applications of electroplated tin include corrosion protection, electronics fabrication and cooking utensils. The past 20 years have seen developments in the science and technology of tin plating, including research into nanostructured deposits, adoption of environmentally friendly methanesulfonic acid baths and more ambitious coatings including multi-layers and composites. Our ability to tailor deposit structure and composition has been improved by newer electrolytes, pulse plating and electrolyte additives. The diversity of tin applications has extended to lithium batteries using newer structures (such as composites, multi-layers and nanostructures), electrical control (e.g., pulsed current) and relative bath/electrode movement (including the use of rotating electrodes). Electrochemical aspects of modern tin deposition are illustrated by data from the authors' laboratory which highlights the versatility of methanesulfonic acid electrolytes. A wide range of deposit morphology, colour and surface finish are possible by the use of suitable addition agents and control of electrode/electrolyte movement and operating conditions. Subject areas needing further research work are identified.

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Section: Nucleation and Growth Of Tin On Coppermentioning

confidence: 99%

A review of developments in the electrodeposition of tin

Walsh

Low

2016

Surface and Coatings Technology

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“…26 Furthermore, the (NH 4 ) +1 ions may preferentially adsorb on certain orientations, diminishing the growth rate of the Co nucleus. 27 Also, the presence of (NH 4 ) +1 ions on the Co coordination sphere diminishes the overpotential applied during cation reduction due to a tunnel effect favored by (NH 4 ) +1 . 23 Co electrodeposition on Pt substrates from chloride solutions may not have received much attention because, in such systems, simultaneous hydrogen evolution makes Co electrodeposition difficult.…”

Section: Introductionmentioning

confidence: 99%

Kinetical study about the cobalt electrodeposition onto polycrystalline platinum

Ríos-Reyes¹,

Mendoza-Huízar²,

Reyes-Cruz³

et al. 2013

Quím. Nova

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Recebido em 2/10/12; aceito em 25/2/13; publicado na web em 24/5/13An electrochemical study of Co electrodeposition onto polycrystalline Pt from an aqueous solution containing 10 −2 M CoCl 2 + 1 M NH 4 CI (pH = 9.3) was conducted at overpotential conditions. The current density transients showed two maxima that corresponded to two nucleation and growth processes. The entire transient behavior was adequately predicted considering the contribution to the total current of four different processes: a Langmuir-type adsorption process, a diffusion-controlled twodimensional instantaneous nucleation, and two three-dimensional nucleation and growth processes.

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“…Cobalt electrodeposition on highly oriented pyrolytic graphite (HOPG) [1,4] and glassy carbon [2,11] substrates has been studied. Specifically, Grujicic and Pesic [2] published a study on cobalt nucleation mechanisms on a glassy carbon electrode starting from different ammonium sulphate aqueous solutions and using different techniques, such as cyclic voltammetry and chronoamperometry.…”

Section: Introductionmentioning

confidence: 99%

“…Most studies about cobalt electrodeposition have been performed on a variety of substrates, such as carbon-based materials [1][2][3][4], gold [5,6], nickel [7], copper [8] and platinum [9], as working electrodes (WE). Carbonbased substrates have frequently been used as electrodes because they are inert surfaces that result in low hydrogen formation at high negative potential [10].…”

Section: Introductionmentioning

confidence: 99%

In-situ magnetization measurements and ex-situ morphological analysis of electrodeposited cobalt onto chemical vapor deposition graphene/SiO₂/Si

Franco¹,

Castro²,

Corredor³

et al. 2017

Carbon letters

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Cobalt was electrodeposited onto chemical vapor deposition (CVD) graphene/Si/SiO 2 substrates, during different time intervals, using an electrolyte solution containing a low concentration of cobalt sulfate. The intention was to investigate the details of the deposition process (and the dissolution process) and the resulting magnetic properties of the Co deposits on graphene. During and after electrodeposition, in-situ magnetic measurements were performed using an (AGFM). These were followed by ex situ morphological analysis of the samples with ∆t DEP 30 and 100 s by atomic force microscopy in the non-contact mode on pristine CVD graphene/SiO 2 /Si. We demonstrate that it is possible to electrodeposit Co onto graphene, and that in-situ magnetic measurements can also help in understanding details of the deposition process itself. The results show that the Co deposits are ferromagnetic with decreasing coercivity (H C ) and demonstrate increasing magnetization on saturation (M SAT ) and electric signal proportional to remanence (M r ), as a function of the amount of the electrodeposited Co. It was also found that, after the end of the dissolution process, a certain amount of cobalt remains on the graphene in oxide form (this was confirmed by X-ray photoelectron spectroscopy), as suggested by the magnetic measurements. This oxide tends to exhibit a limited asymptotic amount when cycling through the deposition/dissolution process for increasing deposition times, possibly indicating that the oxidation process is similar to the graphene surface chemistry.

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Electrochemical and AFM study of cobalt nucleation mechanisms on glassy carbon from ammonium sulfate solutions

Cited by 121 publications

References 17 publications

A review of developments in the electrodeposition of tin

A review of developments in the electrodeposition of tin

Kinetical study about the cobalt electrodeposition onto polycrystalline platinum

In-situ magnetization measurements and ex-situ morphological analysis of electrodeposited cobalt onto chemical vapor deposition graphene/SiO₂/Si

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Electrochemical and AFM study of cobalt nucleation mechanisms on glassy carbon from ammonium sulfate solutions

Cited by 121 publications

References 17 publications

A review of developments in the electrodeposition of tin

A review of developments in the electrodeposition of tin

Kinetical study about the cobalt electrodeposition onto polycrystalline platinum

In-situ magnetization measurements and ex-situ morphological analysis of electrodeposited cobalt onto chemical vapor deposition graphene/SiO2/Si

Contact Info

Product

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In-situ magnetization measurements and ex-situ morphological analysis of electrodeposited cobalt onto chemical vapor deposition graphene/SiO₂/Si