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Electrochemical Impedance Spectrocopy Study Of Glucose Adsorption On Gold Nanoparticles-Graphite Paste Electrode

Published online by Cambridge University Press:  04 September 2017

Azucena Osornio ,
Luis A. García ,
Leonor M. Blanco ,
Rene Antaño  and
Federico Castañeda
Azucena Osornio
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en electroquímica. Parque Tecnológico Querétaro s/n Sanfandila, C.P.76703, Pedro Escobedo, Querétaro, México.
Luis A. García
Affiliation:
Centro de investigación en Química Aplicada. Blvd. Enrique Reyna # 140 Col. San José de los Cerritos Saltillo, Coahuila. México. C.P.25294.
Leonor M. Blanco
Affiliation:
Universidad Autónoma de Nuevo León, Laboratorio de Electroquímica, Guerrero y progreso s/n, Col. Treviño, Monterrey, N.L. C. P.64570, Nuevo León, México.
Rene Antaño
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en electroquímica. Parque Tecnológico Querétaro s/n Sanfandila, C.P.76703, Pedro Escobedo, Querétaro, México.
Federico Castañeda*
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en electroquímica. Parque Tecnológico Querétaro s/n Sanfandila, C.P.76703, Pedro Escobedo, Querétaro, México.
*
*(Email: fcastaneda@cideteq.mx)
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Abstract

Electrochemical Impedance Spectroscopy (EIS), is a confirmed tool for investigation of electrode/electrolyte interfaces and surface-modified electrodes. In the present work, we apply this approaching way to obtain a deeper insight into the electrochemical oxidation mechanism of the glucose in alkaline media. We studied the EIS response of gold nanoparticles embedded in carbon paste and use it as an electrode for the electro-oxidation of glucose. The results were compared with those of a polycrystalline gold electrode. In order to determine the polarization potentials for EIS tests, cyclic voltammetry is first conducted in 0.3 M KOH with 10 mM glucose, recorded at a scan rate of 1 mVs-1. Three polarization potentials were chosen, corresponding to: the open circuit potential (OCP), glucose oxidation and gold oxide formation respectively.

Keywords

Electrochemical SynthesisNanoscaleOxidation
Type
Articles
Information
MRS Advances , Volume 2 , Issue 49: International Materials Research Congress XXV , 2017 , pp. 2713 - 2720
Copyright
Copyright © Materials Research Society 2017 

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References

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