Probing Electrode Heterogeneity Using Fourier-Transformed Alternating Current Voltammetry: Application to a Dual-Electrode Configuration
| Autor: | Sze-yin Tan, Jie Zhang, Julie V. Macpherson, Patrick R. Unwin, Alan M. Bond |
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| Rok vydání: | 2017 |
| Předmět: |
Standard hydrogen electrode
Chemistry Analytical chemistry 02 engineering and technology Electrolyte Dropping mercury electrode Glassy carbon 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Electron transfer Electrode 0210 nano-technology Voltammetry |
| Zdroj: | Analytical Chemistry. 89:2830-2837 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | Quantitative studies of electron transfer processes at electrode/electrolyte interfaces, originally developed for homogeneous liquid mercury or metallic electrodes, are difficult to adapt to the spatially heterogeneous nanostructured electrode materials that are now commonly used in modern electrochemistry. In this study, the impact of surface heterogeneity on Fourier-transformed alternating current voltammetry (FTACV) has been investigated theoretically under the simplest possible conditions where no overlap of diffusion layers occurs and where numerical simulations based on a 1D diffusion model are sufficient to describe the mass transport problem. Experimental data that meet these requirements can be obtained with the aqueous [Ru(NH3)6]3+/2+ redox process at a dual-electrode system comprised of electrically coupled but well-separated glassy carbon (GC) and boron-doped diamond (BDD) electrodes. Simulated and experimental FTACV data obtained with this electrode configuration, and where distinctly differe... |
| Databáze: | OpenAIRE |
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