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dc.contributor.author
Tucceri, Ismael Ricardo
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dc.date.available
2018-10-04T15:58:30Z
dc.date.issued
2016-12
dc.identifier.citation
Tucceri, Ismael Ricardo; The charge transport process at gold electrodes modified by thick nickel hydroxide films. A study employing rotating disc electrode voltammetry in the presence of the Fe(CN)6 3 −/4 − redox couple; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 782; 12-2016; 125-132
dc.identifier.issn
1572-6657
dc.identifier.uri
http://hdl.handle.net/11336/61672
dc.description.abstract
Rotating disc electrode voltammetry (RDEV) was employed to study the transport properties of nickel hydroxide films electrochemically deposited on gold in the presence of the Fe(CN)6 3 −/4 − redox couple. Gold electrodes coated with nickel hydroxide surface coverages within the range 0.7 nmol cm− 2 < ΓNi(OH)2 < 55 nmol cm− 2 were obtained. Steady-state current vs. potential (I-E) dependences at different electrode rotation rates within the range 50 rpm–5000 rpm were recorded for each ΓNi(OH)2 value. While the anodic limiting current at the different nickel hydroxide surface coverages followed the Levich equation, the cathodic limiting current only responded to the Levich relationship within the ΓNi(OH)2 range comprised between 0.7 nmol cm− 2 and 16 nmol cm− 2. The cathodic limiting current at ΓNi(OH)2 values higher than 25 nmol cm− 2 responded to a reactant membrane diffusion phenomenon within the nickel hydroxide film. The cathodic process for thick nickel hydroxide films was associated with the physical diffusion of the Fe(CN)6 3 − species across the film to be reduced at the gold surface. A diffusion constant for the Fe(CN)6 3 − species dependent on the nickel surface coverage was obtained. Although the Fe(CN)6 4 − oxidation seemed to occur by a rapid electron-transfer process, a limiting electron-transport rate was observed at ΓNi(OH)2 values higher than 40 nmol cm− 2 and at high electrode rotation rates (> 7000 rpm).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Charge Transport Processes
dc.subject
Fe(Cn)6 3 &Minus;/4 &Minus; Species Diffusion Coefficient
dc.subject
Nickel Hydroxide Films
dc.subject.classification
Otras Ciencias Químicas
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The charge transport process at gold electrodes modified by thick nickel hydroxide films. A study employing rotating disc electrode voltammetry in the presence of the Fe(CN)6 3 −/4 − redox couple
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-03T17:44:45Z
dc.identifier.eissn
0022-0728
dc.journal.volume
782
dc.journal.pagination
125-132
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Tucceri, Ismael Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.journal.title
Journal of Electroanalytical Chemistry
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1016/j.jelechem.2016.10.015
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665716305355
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