Comparative study of different types of graphenes as electrocatalysts for ascorbic acid
Φόρτωση...
Ημερομηνία
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Electrochemistry Communications
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
A comparative study regarding the electrocatalytic activity of graphene oxide (GO), chemically-reduced graphene oxide (crGO) and graphene produced by direct liquid exfoliation (dG) is presented. Sensors were developed by modifying glassy carbon (GC) electrodes with GO, crGO and dG and ascorbic acid was used as a pilot analyte. GC/GO electrodes offer substantially lower oxidation overpotential, up to 350 mV, compared with GC/crGO, GC/dG and unmodified GC electrodes. In addition, the different carbon-to-oxygen atomic ratios in GO, as it occurs depending on the synthetic route, were found to have a remarkable effect on the performance of the sensors. Reduction of GO was achieved by immersing the modified electrodes into a stirred solution of NaBH(4) for 10 min at room temperature. This process was used alternatively of the time consuming and laborious process of hydrazine, and its effectiveness was confirmed by cyclic voltammetry and electrochemical impedance spectroscopy. Analytical utility of the sensors is demonstrated. (C) 2010 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
graphene oxide, chemically-reduced graphene oxide, graphene, ascorbic acid, electrochemical sensors, oxide, liquid
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000284444500012
http://ac.els-cdn.com/S1388248110003024/1-s2.0-S1388248110003024-main.pdf?_tid=7988475fd66ec9f5f44107ca34a34c5c&acdnat=1333037377_c5326ae469bb40e3de631b512fefdb6f
http://ac.els-cdn.com/S1388248110003024/1-s2.0-S1388248110003024-main.pdf?_tid=7988475fd66ec9f5f44107ca34a34c5c&acdnat=1333037377_c5326ae469bb40e3de631b512fefdb6f
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας