Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole
Cobalt oxide nanoparticles were anchored on polyaniline-appended cobalt phthalocyanine and used to modify glassy carbon electrodes for enhanced electrocatalytic oxidation of amitrole. The modified electrodes were characterised by cyclic voltammetry, electrochemical impedance spectroscopy and scannin...
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Springer New York LLC
2021
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| Online Access: | https://link.springer.com/article/10.1007/s10008-018-4131-8 http://hdl.handle.net/11408/4399 |
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| author | Mafuwe, Peter T. Moyo, Mambo Mugadza, Tawanda Shumba, Munyaradzi Nyoni, Steven |
| author_facet | Mafuwe, Peter T. Moyo, Mambo Mugadza, Tawanda Shumba, Munyaradzi Nyoni, Steven |
| author_sort | Mafuwe, Peter T. |
| collection | DSpace |
| description | Cobalt oxide nanoparticles were anchored on polyaniline-appended cobalt phthalocyanine and used to modify glassy carbon electrodes for enhanced electrocatalytic oxidation of amitrole. The modified electrodes were characterised by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Cyclic voltammetry, linear sweep voltammetry, chronoamperometry and differential pulse voltammetry were used to evaluate the electrocatalytic behaviour of the designed sensors. Catalytic rate constant of 6.26 × 105 M−1 s−1 and apparent electron transfer rate constant of 8.84 × 10−3 cm s−1 were observed on CoTCPc-PANI-Co3O4NP-GCE. The adsorption equilibrium constant and Gibbs energy were 4.8 × 101 M−1 and − 12.1 kJ mol−1, respectively, confirming substrate adsorption during a spontaneous reaction on the surface of the modified electrode. The limit of detection and limit of quantification were 6.61 × 10−8 M and 2 × 10−7 M, respectively, for the electrocatalytic detection of amitrole and only suffered 4% signal loss after repetitive ten runs in 1 mM amitrole. |
| format | Article |
| id | ir-11408-4399 |
| institution | My University |
| language | English |
| publishDate | 2021 |
| publisher | Springer New York LLC |
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| spelling | ir-11408-43992022-06-27T13:49:06Z Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole Mafuwe, Peter T. Moyo, Mambo Mugadza, Tawanda Shumba, Munyaradzi Nyoni, Steven Amitrole Electrooxidation Electrochemical sensor Polyaniline-appended cobalt phthalocyanine Cobalt oxide nanoparticles Cobalt oxide nanoparticles were anchored on polyaniline-appended cobalt phthalocyanine and used to modify glassy carbon electrodes for enhanced electrocatalytic oxidation of amitrole. The modified electrodes were characterised by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Cyclic voltammetry, linear sweep voltammetry, chronoamperometry and differential pulse voltammetry were used to evaluate the electrocatalytic behaviour of the designed sensors. Catalytic rate constant of 6.26 × 105 M−1 s−1 and apparent electron transfer rate constant of 8.84 × 10−3 cm s−1 were observed on CoTCPc-PANI-Co3O4NP-GCE. The adsorption equilibrium constant and Gibbs energy were 4.8 × 101 M−1 and − 12.1 kJ mol−1, respectively, confirming substrate adsorption during a spontaneous reaction on the surface of the modified electrode. The limit of detection and limit of quantification were 6.61 × 10−8 M and 2 × 10−7 M, respectively, for the electrocatalytic detection of amitrole and only suffered 4% signal loss after repetitive ten runs in 1 mM amitrole. 2021-06-07T13:42:34Z 2021-06-07T13:42:34Z 2019 Article 1433-0768 https://link.springer.com/article/10.1007/s10008-018-4131-8 http://hdl.handle.net/11408/4399 en Journal of Solid State Electrochemistry;Vol.23 : p.285–294 open Springer New York LLC |
| spellingShingle | Amitrole Electrooxidation Electrochemical sensor Polyaniline-appended cobalt phthalocyanine Cobalt oxide nanoparticles Mafuwe, Peter T. Moyo, Mambo Mugadza, Tawanda Shumba, Munyaradzi Nyoni, Steven Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title | Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title_full | Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title_fullStr | Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title_full_unstemmed | Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title_short | Cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| title_sort | cobalt oxide nanoparticles anchored polyaniline-appended cobalt tetracarboxy phthalocyanine, modified glassy carbon electrode for facile electrocatalysis of amitrole |
| topic | Amitrole Electrooxidation Electrochemical sensor Polyaniline-appended cobalt phthalocyanine Cobalt oxide nanoparticles |
| url | https://link.springer.com/article/10.1007/s10008-018-4131-8 http://hdl.handle.net/11408/4399 |
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