Hamzah, Hairul Hisham and Ahmad Kamal, Najahtul Najihah and Meneghello, Marta and Shafiee, Saiful 'Arifin and Sönmez, Turgut and Mohamad Taib, Mohamad Nurul Azmi and Mohd Samsuri, Mohd Samsuri and Meor Zulkifli, Meor Faisal (2020) Hexanediamine monolayer electrografted at glassy carbon electrodes enhances oxygen reduction reaction in aqueous neutral media. Journal of the Electrochemical Society, 167 (16). ISSN 0013-4651 E-ISSN 1945-7111
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Abstract
This study presents for the first time the electrocatalytic behaviour of hexanediamine (HDA) monolayer electrografted at glassy carbon (GC) electrodes that enhanced oxygen reduction reaction (ORR) in aqueous neutral media. HDA modified GC electrodes gave a higher current density than platinum bare electrodes based on the cyclic voltammograms (CV), although a ~0.21 V vs. Ag/AgCl higher onset potential was observed at −0.1 mA cm-2. Electrochemical impedance spectra (EIS) showed that the electrocatalytic reaction on HDA monolayer film towards dissolved oxygen molecules is controlled by diffusion and charge transfer processes. From the scan rate studies and the Laviron equation, it was found that the ORR on this modified electrode proceeded via a fast four-electrons transfer.
| Item Type: | Article (Journal) |
|---|---|
| Additional Information: | 9604/87040 |
| Uncontrolled Keywords: | Hexanediamine monolayer |
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology > TP250 Industrial electrochemistry |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Science > Department of Chemistry |
| Depositing User: | Dr Saiful 'Arifin Bin Shafiee |
| Date Deposited: | 30 Dec 2020 08:57 |
| Last Modified: | 30 Dec 2020 08:57 |
| URI: | http://irep.iium.edu.my/id/eprint/87040 |
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