Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4

Mamie Sancy, Jorge Pavez, Miguel A. Gulppi, Ivanildo Luiz deMattos, Ramiro Arratia-Perez, Cristian Linares-Flores, Maritza Paez, Tebello Nyokong, José H. Zagal

Resultado de la investigación: Article

11 Citas (Scopus)

Resumen

We have studied the trends in catalytic activity of several Co macrocyclics confined on the surface graphite electrodes for the oxidation of thiocyanate. A plot of log i (at constant E) versus the formal potential of the catalyst gives a volcano correlation, indicating that the Co(II/I) redox potential needs to be tuned, in order to achieve maximum reactivity. Graphite electrodes modified with Co phthalocyanine at pH4 exhibit linear amperometric response for thiocyanate concentration in the range 10-7 and 10-3M. Theoretical calculations show that electrocatalytic activity (as log i at constant E) plotted versus the energy of the LUMO of the Co complex also gives a volcano correlation.

Idioma originalEnglish
Páginas (desde-hasta)711-718
Número de páginas8
PublicaciónElectroanalysis
Volumen23
N.º3
DOI
EstadoPublished - 1 mar 2011

Huella dactilar

Graphite electrodes
Volcanoes
Electrooxidation
Catalyst activity
Oxidation
Catalysts
thiocyanate
Oxidation-Reduction
phthalocyanine

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Citar esto

Sancy, Mamie ; Pavez, Jorge ; Gulppi, Miguel A. ; deMattos, Ivanildo Luiz ; Arratia-Perez, Ramiro ; Linares-Flores, Cristian ; Paez, Maritza ; Nyokong, Tebello ; Zagal, José H. / Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4. En: Electroanalysis. 2011 ; Vol. 23, N.º 3. pp. 711-718.
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title = "Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4",
abstract = "We have studied the trends in catalytic activity of several Co macrocyclics confined on the surface graphite electrodes for the oxidation of thiocyanate. A plot of log i (at constant E) versus the formal potential of the catalyst gives a volcano correlation, indicating that the Co(II/I) redox potential needs to be tuned, in order to achieve maximum reactivity. Graphite electrodes modified with Co phthalocyanine at pH4 exhibit linear amperometric response for thiocyanate concentration in the range 10-7 and 10-3M. Theoretical calculations show that electrocatalytic activity (as log i at constant E) plotted versus the energy of the LUMO of the Co complex also gives a volcano correlation.",
keywords = "Cobalt macrocyclics, Cobalt phthalocyanine, Redox potential, Thiocyanate sensor, Volcano correlations",
author = "Mamie Sancy and Jorge Pavez and Gulppi, {Miguel A.} and deMattos, {Ivanildo Luiz} and Ramiro Arratia-Perez and Cristian Linares-Flores and Maritza Paez and Tebello Nyokong and Zagal, {Jos{\'e} H.}",
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Sancy, M, Pavez, J, Gulppi, MA, deMattos, IL, Arratia-Perez, R, Linares-Flores, C, Paez, M, Nyokong, T & Zagal, JH 2011, 'Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4', Electroanalysis, vol. 23, n.º 3, pp. 711-718. https://doi.org/10.1002/elan.201000599

Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4. / Sancy, Mamie; Pavez, Jorge; Gulppi, Miguel A.; deMattos, Ivanildo Luiz; Arratia-Perez, Ramiro; Linares-Flores, Cristian; Paez, Maritza; Nyokong, Tebello; Zagal, José H.

En: Electroanalysis, Vol. 23, N.º 3, 01.03.2011, p. 711-718.

Resultado de la investigación: Article

TY - JOUR

T1 - Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH4

AU - Sancy, Mamie

AU - Pavez, Jorge

AU - Gulppi, Miguel A.

AU - deMattos, Ivanildo Luiz

AU - Arratia-Perez, Ramiro

AU - Linares-Flores, Cristian

AU - Paez, Maritza

AU - Nyokong, Tebello

AU - Zagal, José H.

PY - 2011/3/1

Y1 - 2011/3/1

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AB - We have studied the trends in catalytic activity of several Co macrocyclics confined on the surface graphite electrodes for the oxidation of thiocyanate. A plot of log i (at constant E) versus the formal potential of the catalyst gives a volcano correlation, indicating that the Co(II/I) redox potential needs to be tuned, in order to achieve maximum reactivity. Graphite electrodes modified with Co phthalocyanine at pH4 exhibit linear amperometric response for thiocyanate concentration in the range 10-7 and 10-3M. Theoretical calculations show that electrocatalytic activity (as log i at constant E) plotted versus the energy of the LUMO of the Co complex also gives a volcano correlation.

KW - Cobalt macrocyclics

KW - Cobalt phthalocyanine

KW - Redox potential

KW - Thiocyanate sensor

KW - Volcano correlations

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