Hexanediamine Monolayer Electrografted at Glassy Carbon Electrodes Enhances Oxygen Reduction Reaction in Aqueous Neutral Media
Küçük Resim Yok
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Electrochemical Soc Inc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
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.
Açıklama
Anahtar Kelimeler
Hexanediamine monolayer, Electrografting, Covalent attachment, Oxygen reduction reaction, Electrocatalyst
Kaynak
Journal of the Electrochemical Society
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
167
Sayı
16
