Transient and steady-state model of cobalt deposition in borate-sulfate solutions

Vazquez‐Arenas, Jorge; Pritzker, Mark

doi:10.1016/j.electacta.2010.07.013

Cited by 14 publications

(14 citation statements)

References 32 publications

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“…However, these approaches largely improve the understanding of the electrochemical processes at electrode surfaces, for example, partial reactions (oxidation or deoxidation steps), nucleation and electrocrystallisation. The transient current and voltage behaviour [3][4][5] as well as the impedance behaviour of electrochemical processes [6][7][8][9][10][11][12][13] have been described by these approaches in good accordance with experimental results.…”

Section: Introductionsupporting

confidence: 71%

Calculation approach for current–potential behaviour during pulse electrodeposition based on double-layer characteristics

Scharf

Sieber

Lampke

2014

Transactions of the IMF

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This paper introduces a phenomenological calculation approach for the electrolytic pulse deposition of nickel under high polarisation based on an equivalent electrical circuit. In a quasistationary state of the deposition, the electrolyte resistance and double layer parameters are identified by electrochemical impedance spectroscopy and galvanostatic polarisation. The charge-transfer resistance of both the anodic and cathodic electrode double layer is inversely proportional to the current density. This means the overpotentials over the electrode double layers are independent of the current density. For short pulse on-times and off-times (up to 10 ms), the behaviour of the electrolytic cell is mainly determined by the double layer characteristics and the calculation approach therefore allows the prediction of the current-potential behaviour during pulse deposition under high polarisation. For larger pulse widths, the time-dependent evolution of the overpotentials occurring at the electrode/electrolyte interface becomes a determining factor for the cell potential.

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Section: Introductionsupporting

confidence: 71%

Calculation approach for current–potential behaviour during pulse electrodeposition based on double-layer characteristics

Scharf

Sieber

Lampke

2014

Transactions of the IMF

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“…Their model was employed by Hauser and Newman 21,22 to describe the influence of homogenous consumption of cuprous ion on the impedance response associated with dissolution of a rotating copper disk electrode under assumption of linear homogeneous kinetics and an infinite Schmidt number. Vazquez-Arenas and Pritzker 23,24 developed a model for the deposition of cobalt ions on a rotating cobalt disk under the assumption that homogeneous reactions were equilibrated.…”

mentioning

confidence: 99%

The Influence of Homogeneous Reactions on the Impedance Response of a Rotating Disk Electrode

Harding

Tribollet

Vivier

et al. 2017

J. Electrochem. Soc.

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A mathematical model was developed for the impedance response associated with coupled homogeneous chemical and heterogeneous electrochemical reactions. The model includes a homogeneous reaction in the electrolyte in which species AB reacts reversibly to form A − and B + and B + reacts electrochemically on a rotating disk electrode to produce B. The resulting diffusion impedance has two asymmetric capacitive loops, one associated with convective diffusion and the other with the homogeneous reaction. For an infinitely fast homogeneous reaction, the system is shown to behave as though AB is the electroactive species. A modified Gerischer impedance was found to provide a good fit to the simulated data. The coupling of homogeneous chemical reactions and heterogeneous electrochemical reactions has drawn substantial interest over the past 80 years. Koutecky and Levich 1-3 developed a steady-state model for a homogeneous reaction coupled with an electrochemical reaction on a rotating disk electrode. The homogenous reaction was assumed to follow linear kinetics, all diffusion coefficients were assumed to be equal, and the Schmidt number was assumed infinite. Koutecky and Levich defined a characteristic dimension for the homogeneous reaction, termed the thickness of the kinetic layer and represented bywhere α = k f +k b , k f and k b are respectively the forward and backward rate constants of the homogeneous reaction, and D is the diffusion coefficient. Bossche et al. 4 describe finite-difference calculations under assumption of a steady state for an electrochemical system controlled by diffusion, migration, convection, and nonlinear homogeneous reaction kinetics. Their convection term used a three-term expansion appropriate for positions close to the electrode surface.5 Deslouis et al. 6 used a submerged impinging jet cell to measure interfacial pH during the reduction of dissolved oxygen in the presence of carbonate. Their analysis considered the homogeneous reaction involving water and hydroxide, bicarbonate, and carbonate ions. Remita et al. 7 have shown that, for a deaerated aqueous electrolyte containing dissolved carbon dioxide, hydrogen evolution is enhanced by the homogeneous dissociation of CO 2 . Tran et al. 8 demonstrated that homogeneous dissociation of acetic acid enhances cathodic reduction of hydronium ions. Smith 9,10 used AC Polarography to study different linear firstorder homogeneous reaction mechanisms, including preceding, following, and catalytic chemical reactions coupled with electrochemical reactions. Jurczakowski and Polczynski 11 developed an AC model with coupled homogenous and heterogeneous reactions accounting for cases where diffusion coefficients are not considered to be equal. The above mechanisms assumed simplified homogeneous reactions, with a maximum of two species considered.Using chronopotentiometry, Delahay and Berzins 12 showed that cadmium cyanide complexes undergo a dissociation before electrore- * Electrochemical Society Student Member. * * Electrochemical Society Fellow. * * * ...

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“…All sets of equations were solved with the use of ESTYM_PDE electrochemical software by K. Kaczmarski, described in and tested in reference. One can indicate several examples of electrochemical problems solved by experiment/model comparison with the use of cyclic voltammetry , square‐wave voltammetry , electrochemical impedance spectroscopy and linear sweep voltammetry/rotating disk electrode . Theoretical background of electrochemical simulations one can find in .…”

Section: Kinetic Model and Experimental Partmentioning

confidence: 99%

Iso Points in Electrochemistry. Classification and Verification by Experiment and Theory

2018

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The experimental examples of occurrence of isoalpha points (iap) in electroreduction of Cu2+, Tl+, Zn2+ in the presence of 1,3‐dimethyl‐2‐thiourea have been presented. The theoretical ECE and EE model examples of iap and isopotential point (ipp) as well as mixed iap/ipp isopoints are discussed in the context of their similarities and differences. Novel extended interpretation of ipp points in electrochemistry, based on concentration profiles approach, was also introduced.

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Transient and steady-state model of cobalt deposition in borate-sulfate solutions

Cited by 14 publications

References 32 publications

Calculation approach for current–potential behaviour during pulse electrodeposition based on double-layer characteristics

Calculation approach for current–potential behaviour during pulse electrodeposition based on double-layer characteristics

The Influence of Homogeneous Reactions on the Impedance Response of a Rotating Disk Electrode

Iso Points in Electrochemistry. Classification and Verification by Experiment and Theory

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