Voltammetric characterization of boron-doped diamond electrodes for electroanalytical applications
| Autor: | Marian Vojs, I. Hotovy, Pavol Michniak, Miroslav Mikolášek, Marián Marton, V. Rehacek, A. Vincze, Alexander Kromka |
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| Rok vydání: | 2020 |
| Předmět: |
General Chemical Engineering
Inorganic chemistry chemistry.chemical_element Diamond 02 engineering and technology Chemical vapor deposition engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Bismuth Anodic stripping voltammetry chemistry Electrode Electrochemistry engineering Cyclic voltammetry 0210 nano-technology Boron Voltammetry |
| Zdroj: | Journal of Electroanalytical Chemistry. 862:114020 |
| ISSN: | 1572-6657 |
| Popis: | The unique properties of boron-doped diamond make it a promising electrode material for electroanalytical applications, especially for stripping voltammetry. The boron-doped diamond (BDD) electrodes prepared by chemical vapor deposition (CVD) on alumina substrates were electrochemically characterized by cyclic voltammetry. The influence was investigated of the boron dopant concentration, surface termination as well as chemical surface treatment on the kinetics of the electrode reaction. A standard redox couple, ferro/ferricyanide in aqueous solution, was employed to determine important kinetic parameters (anodic transfer coefficient, diffusion coefficient, and electron transfer rate constants) of the reaction. The effect of surface conditions of the boron-doped diamond electrodes on the kinetics of the electrodeposition of bismuth film was investigated for electrochemical applications in which bismuth film electrodes are utilized. A favourable effect of the cleaning procedures was proved, especially for the oxygen plasma-treated BDD electrode with a higher content of boron in alkaline solution. The anodic current response was increased by 109% when compared with as-grown BDD. The effect of the quality of bismuth film on analytical performance of the voltammetric sensor was verified in simultaneous analysis of heavy metals (Pb, Cd and Zn) by anodic stripping voltammetry. |
| Databáze: | OpenAIRE |
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