Electrochemical Oxidation of Ascorbic Acid Mediated by Single-Walled Carbon Nanotube/Tungsten Oxide Nanoparticles Modified Glassy Carbon Electrode

摘要

The electrocatalytic study of ascorbic acid using single-walled carbon nanotube/tungsten oxide(SWCNT/WO3) modified glassy carbon electrode prepared by mechanical attachment was conducted.The oxidation peaks obtained indicate that the SWCNT/WO3-modified glassy carbon electrode hasgood electrochemical behaviour in terms of sensitivity. The mechanical attachment of a SWCNT/WO3composite on the glassy carbon electrode (GCE) surface enhanced the oxidative current whencompared to the WO3-modified electrode and bare GCE. The oxidation peak of SWCNT/WO3- modified electrode was considerably enhanced by 2.5 times with about a 230 mV peak shift towards alower potential when the SWCNT/WO3-modified electrode was used in comparison with a bare GCE.