Enhanced Oxidation of Uric Acid at Thiourea-Modified Gold Electrode in Alkaline Media
| Autor: | Debashis Sen, F. Islam, Rezwan Miah, Tarannuma Ferdous Manny, R. Mahmud |
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| Rok vydání: | 2020 |
| Předmět: |
Chemistry
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Ascorbic acid 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption Thiourea Monolayer Electrode Crystallite 0210 nano-technology Current density Nuclear chemistry |
| Zdroj: | Russian Journal of Electrochemistry. 56:570-577 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s1023193520070046 |
| Popis: | The surface of polycrystalline gold (Au (poly)) electrode was ex situ modified with self-assembled monolayer (SAM) of thiourea (TU) with a view of applying the electrode for the electrochemical oxidation of uric acid (UA) in alkaline media. UA undergoes an enhanced electrochemical oxidation at the monolayer of TU-modified Au (poly) (TU|Au (poly)) electrode at a remarkably lower potential with a higher current density as compared to the bare Au (poly) electrode. The enhanced activity of the electrode was achieved due to the effective blocking of harmful adsorption of UA that takes place strongly at the bare Au (poly) electrode surface. The TU|Au (poly) electrode was also found to be very effective towards simultaneous oxidations of UA, ascorbic acid (AA) and dopamine (DA) in their mixture with well separation of the peak current of the individual substance. This technique may be advantageously utilized for developing sensor for the purpose of detection of UA. |
| Databáze: | OpenAIRE |
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