Hexanediamine Monolayer Electrografted at Glassy Carbon Electrodes Enhances Oxygen Reduction Reaction in Aqueous Neutral Media

被引：11

作者：

Hamzah, Hairul Hisham ^{[1
]}

Kamal, Najahtul Najihah Ahmad ^{[1
]}

Meneghello, Marta ^{[2
]}

Shafiee, Saiful Arifin ^{[3
]}

Sonmez, Turgut ^{[4
,5
]}

Taib, Mohamad Nurul Azmi Mohamad ^{[1
]}

Samsuri, Shazarizul Haziq Mohd ^{[6
]}

Zulkifii, Meor Faisal Meor ^{[7
]}

机构：

[1] Univ Sains Malaysia, Sch Chem Sci, Gelugor 11800, Penang, Malaysia

[2] Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin J Aiguier, F-13009 Marseille, France

[3] Int Islamic Univ Malaysia, Kulliyyah Sci, Dept Chem, Jalan Sultan Ahmad Shah, Kuantan 25200, Pahang, Malaysia

[4] Karabuk Univ, Technol Fac, Dept Energy Syst Engn, TR-78050 Karabuk, Turkey

[5] Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, Worringerweg 2, D-52074 Aachen, Germany

[6] TNB Res Sdn Bhd, Kajang 43000, Selangor, Malaysia

[7] iNeurons, Tower 5,Sky Pk, Cyberjaya 47100, Selangor, Malaysia

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2020年 / 167卷 / 16期

关键词：

Hexanediamine monolayer; Electrografting; Covalent attachment; Oxygen reduction reaction; Electrocatalyst; SITE-DIRECTED IMMOBILIZATION; COVALENT MODIFICATION; SURFACE; MECHANISM; LINKERS; OXIDASE; ACID;

D O I：

10.1149/1945-7111/abcb77

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 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.

引用

页数：8

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