Nucleation and diffusion-controlled growth of electroactive centers: Reduction of protons during cobalt electrodeposition

M. Palomar-Pardavé, B. R. Scharifker, E. M. Arce, M. Romero-Romo

Research output: Contribution to journalArticle

170 Citations (Scopus)

Abstract

A theory is presented describing, for the first time, the temporal evolution of the fractional surface area, S(t), of 3D non-interacting nuclei growing at a rate limited by diffusion of electrodepositing ions onto substrates of a different nature. Likewise, an equation has been derived describing the potentiostatic current-time transients arising from the formation and growth of such nuclei with redox reactions occurring simultaneously on their surfaces. An equation is also proposed to describe the current due to redox reactions taking place on the surface of interacting growing nuclei. The latter is used to describe the experimental current transients recorded during nucleation and growth of cobalt at applied potentials where the proton reduction reaction occurs simultaneously with the electrocrystallization process. © 2005 Elsevier Ltd. All rights reserved.
Original languageAmerican English
Pages (from-to)4736-4745
Number of pages4261
JournalElectrochimica Acta
DOIs
StatePublished - 30 Aug 2005
Externally publishedYes

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Electroplating
Cobalt
Electrodeposition
Oxidation-Reduction
Protons
Nucleation
Redox reactions
Growth
Ions
Substrates

Cite this

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title = "Nucleation and diffusion-controlled growth of electroactive centers: Reduction of protons during cobalt electrodeposition",
abstract = "A theory is presented describing, for the first time, the temporal evolution of the fractional surface area, S(t), of 3D non-interacting nuclei growing at a rate limited by diffusion of electrodepositing ions onto substrates of a different nature. Likewise, an equation has been derived describing the potentiostatic current-time transients arising from the formation and growth of such nuclei with redox reactions occurring simultaneously on their surfaces. An equation is also proposed to describe the current due to redox reactions taking place on the surface of interacting growing nuclei. The latter is used to describe the experimental current transients recorded during nucleation and growth of cobalt at applied potentials where the proton reduction reaction occurs simultaneously with the electrocrystallization process. {\circledC} 2005 Elsevier Ltd. All rights reserved.",
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Nucleation and diffusion-controlled growth of electroactive centers: Reduction of protons during cobalt electrodeposition. / Palomar-Pardavé, M.; Scharifker, B. R.; Arce, E. M.; Romero-Romo, M.

In: Electrochimica Acta, 30.08.2005, p. 4736-4745.

Research output: Contribution to journalArticle

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AU - Scharifker, B. R.

AU - Arce, E. M.

AU - Romero-Romo, M.

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