Abstract
In the present study, we report the electrochemical detection of dissolved oxygen in neutral media using graphene oxide-platinum nanoparticles (GO-PtNPs) composite modified glassy carbon electrode (GCE). The GO-PtNPs composite modified electrode was prepared by immersing the GO modified electrode in deoxygenated 0.5 mM K2PtCl6 with 0.5 M KNO3 solution by cyclic voltammetry. As prepared materials were characterized by scanning electron microscopy and elemental analysis. The GO-PtNPs composite modified electrode showed an excellent electrocatalytic activity towards the reduction of oxygen in pH 7.0 solution than that of PtNPs and GO modified electrodes. The GO-PtNPs composite modified electrode was further used for the detection of dissolved oxygen (DO) in water. The electrochemical results revealed that GO-PtNPs composite modified electrode has high precision and accuracy with the results obtained from the commercial oxygen analyzer for the detection of DO in water.
| Original language | English |
|---|---|
| Pages (from-to) | 10038-10044 |
| Number of pages | 7 |
| Journal | International Journal of Electrochemical Science |
| Volume | 10 |
| Issue number | 12 |
| State | Published - 2015 |
Bibliographical note
Publisher Copyright:© 2015 The Authors.
Keywords
- Dissolved oxygen
- Electrochemical detection
- Graphene oxide
- Oxygen reduction
- Platinum nanoparticles
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