Electrochemical Impedance Spectrocopy Study Of Glucose Adsorption On Gold Nanoparticles-Graphite Paste Electrode
| Autor: | L. M. Blanco, Rene Antaño, Azucena Osornio, Luis A. García, F. Castañeda |
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| Rok vydání: | 2017 |
| Předmět: |
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Materials science Mechanical Engineering Inorganic chemistry 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Dielectric spectroscopy Mechanics of Materials Colloidal gold Electrode General Materials Science Cyclic voltammetry 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | MRS Advances. 2:2713-2720 |
| ISSN: | 2059-8521 |
| DOI: | 10.1557/adv.2017.535 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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