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Title: | Electrocatalytic detection of l-cysteine using molybdenum POM doped-HKUST-1 metal organic frameworks | Authors: | Murinzi, Tafadzwa W. Watkins, Gareth M. Shumba, Munyaradzi Nyokong, Tebello |
Keywords: | Glass carbon electrodes Metal organic frameworks |
Issue Date: | 2021 | Publisher: | Taylor & Francis | Series/Report no.: | Journal of Coordination Chemistry;Vol. 74; No. 9-10: p. 1730-1748 | Abstract: | Glass carbon electrodes (GCE) were modified with metal organic frameworks (MOFs) containing molybdenum polyoxometallates (Mo POMs) in a copper benzene tricarboxylate framework (HKUST-1). The Mo POMs were introduced via one-pot synthesis (Mo2) and post-synthetic modification (Mo1) techniques. The electrode modifiers were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermal analysis. The modified electrodes’ oxidation capacity toward l-cysteine was studied. Mo POMs significantly improved electron transfer kinetics compared to the bare GCE. The best Mo POM doped electrode (Mo1-GCE) had a catalytic rate constant of 2.2 × 104 M−1 s−1 and a limit of detection of 3.07 × 10−7 M. Under the employed experimental conditions, the detection response for l-cysteine was very fast (within 0.1 s) for all the modified electrodes and selective toward l-cysteine in the presence of other amino acids. | URI: | https://doi.org/10.1080/00958972.2021.1907573 http://hdl.handle.net/11408/4707 |
ISSN: | 0095-8972 1029-0389 |
Appears in Collections: | Research Papers |
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Document1.pdf | Abstract | 66.63 kB | Adobe PDF | View/Open |
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