Hamzah, Hairul HishamKamal, Najahtul Najihah AhmadMeneghello, MartaShafiee, Saiful ArifinSonmez, TurgutTaib, Mohamad Nurul Azmi MohamadSamsuri, Shazarizul Haziq Mohd2024-09-292024-09-2920200013-46511945-7111https://doi.org/10.1149/1945-7111/abcb77https://hdl.handle.net/20.500.14619/6360This 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 similar to 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.eninfo:eu-repo/semantics/openAccessHexanediamine monolayerElectrograftingCovalent attachmentOxygen reduction reactionElectrocatalystArticle10.1149/1945-7111/abcb772-s2.0-8509794371316Q1167WOS:000598025700001Q1