Electrochemical nucleation and growth of Co and CoFe alloys on Pt/Si substrates

Sahari, Ali; Azizi, A.; Schmerber, G.; Abes, M.; Bucher, J. P.; Dinia, A.

doi:10.1016/j.cattod.2005.11.075

Cited by 25 publications

(11 citation statements)

References 21 publications

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“…This voltammogram showed a reduction peak between À 0.82 and À 1.16 V with a potential peak of À 0.966 V. In this potential range, cobalt deposition on copper occurred. During the anodic scan the oxidation peak of the electrodeposited cobalt was observed between À 0.62 and À 0.08 V with a maximum oxidation at À 0.28 V. These results correspond to those already found by other authors during the electrodeposition of Co metallic substrates such as Platinum [34] and titanium [27].…”

Section: Determination Of Potentials Reduction and Oxidation Of The Csupporting

confidence: 90%

“…This electrode was introduced into the cell, filled with a deaerated solution [28,31,33]. The electrolyte composition was chosen in order to control hydrogen evolution during the cyclic voltammetry: too low pH electrolyte would lead to hydrogen evolution before metal deposition [34]. The literature mentioned that pH around 4 was the best for Co electrodeposition onto metal substrate [31,35].…”

Section: Determination Of Potentials Reduction and Oxidation Of The Cmentioning

confidence: 99%

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A Cobalt Film Electrode for Nitrite Determination in Natural Water

2007

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In this study a cobalt film electrodeposited on a copper disk (˘¼ 3.1 mm) was tested as electrode to measure nitrite ions in raw water. This electrode was able to determine the nitrite ions concentration in nondeaerated synthetic media and in natural water. The electrode reached a detection limit of 0. , HCO 3 À and NH 4 þ was also tested. The electrode was used to determine the concentration of nitrite ions in a real sample.

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Section: Determination Of Potentials Reduction and Oxidation Of The Csupporting

confidence: 90%

Section: Determination Of Potentials Reduction and Oxidation Of The Cmentioning

confidence: 99%

A Cobalt Film Electrode for Nitrite Determination in Natural Water

2007

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“…In order to study the nucleation mechanism during the early stages of electrodeposition of Sn and Sn-0.7 wt%Cu alloys, and to determine the kinetic parameters, chronoamperometric experiments were carried out to obtain transient currents [22]. Fig.…”

Section: Chronoamperometry and Nucleation Modelingmentioning

confidence: 99%

Nucleation of Sn and Sn–Cu alloys on Pt during electrodeposition from Sn–citrate and Sn–Cu–citrate solutions

Han

Liu

Ivey

2009

Electrochimica Acta

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“…It is known that a critical time for nucleation decreases with raising bath temperature during electrodeposition. 26 Thus, more nuclei of Cu-Sn alloy were created at 50…”

Section: Resultsmentioning

confidence: 99%

Preparation of Cu-Sn Alloy Foam by Electrodeposition in Acid Solution

Bui

Kim

2014

J. Electrochem. Soc.

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Cu-Sn alloy foams were produced by electrodeposition in a 0.5 M sulfuric acid solution using a porous polyurethane (PU) template. A thin seed layer of Ti/Ni was sputter-deposited on the PU template. The sulfuric acid solution contained 10 mM Cu and 1 mM Sn to electrodeposit Cu-Sn alloy under diffusion-controlled condition. The effect of the solution temperature on the chemical composition, microstructure, and electrical resistivity of Cu-Sn alloy foams was fundamentally investigated. Increasing the solution temperature has reduced cathodic overpotential for alloy reduction, resulting in improved reduction rate and deposition efficiency of Cu-Sn alloy. Thermal treatment for the removal of the PU template contributed to the microstructural recovery of as-electrodeposited Cu-Sn alloy. Electrical resistivity of Cu-Sn alloy foams was measured using a Ag-wired plastic holder. In recent years, a number of researches on the synthesis of metal foams have been performed particularly due to their outstanding properties such as high energy absorption capacity, large specific surface area, and low density. Alloy foams have also attracted more interest because pure metal foams have relatively weak mechanical strength. Open-cell Cu alloy foams are characterized by highly porous structure, moderate mechanical properties, and excellent thermal and electrical conductivities in comparison to pure Cu foam for industrial applications. For example, Cu alloy foams have been studied for electrodes of Li-ion batteries to prepare for the increased demand for rechargeable batteries of high performance and large capacity as there is the explosive rise in popularity of portable electronic devices and electric vehicles.12,13 Cu-Sn alloy foams were suggested especially for a component of Li-ion battery electrodes considering their high specific gravimetric capacity, large volume capacity, cycleability, and low cost. [14][15][16] However, fundamental researches on the synthesis method of CuSn alloy foams were not carried out sufficiently although some processes such as ball milling, sintering, and electrodeposition were previously proposed to prepare Cu-Sn alloy foams. [17][18][19] Preparation of open-cell Cu-Sn alloy foams by electrodeposition is more appropriate in respect that an electrolyte can be delivered through their open-cell structures with micro-pores. The control of the chemical composition, microstructure, and electrical property of Cu-Sn alloy foams is available by understanding process parameters in producing Cu-Sn alloy foams by electrodeposition. The parameters include the chemical composition, pH, temperature, and stirring rate of an electrolyte as well as applied current and potential.In this study, we propose an electrochemical deposition process in producing Cu-Sn alloy foams using a porous polyurethane (PU) template. The PU foam template was thermally decomposed after a Cu-Sn alloy layer was electrodeposited on its surface covered with a thin Ti/Ni seed layer. Low concentrations of Cu and Sn, and a large Cu/Sn molar ratio...

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Electrochemical nucleation and growth of Co and CoFe alloys on Pt/Si substrates

Cited by 25 publications

References 21 publications

A Cobalt Film Electrode for Nitrite Determination in Natural Water

A Cobalt Film Electrode for Nitrite Determination in Natural Water

Nucleation of Sn and Sn–Cu alloys on Pt during electrodeposition from Sn–citrate and Sn–Cu–citrate solutions

Preparation of Cu-Sn Alloy Foam by Electrodeposition in Acid Solution

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