Electroanalytical application of graphite nanofibers paste electrode

This article reports on a new kind of carbon paste electrode prepared by mechanical mixing graphite nanofibers (GNF) with mineral oil. Electrochemical behavior of the as prepared graphite nanofibers paste electrode (GNFPE) were thoroughly evaluated with respect to the redox properties of some common electroactive compounds, such as ferricyanide, uric acid (UA), ascorbic acid (AA), dopamine (DA), catechol, acetaminophenol (AP), and epinephrine (EP). The characteristics of the GNFPE were also compared with those of the conventional graphite paste electrode (GPE). The results demonstrated that GNFPE provided improved electron-transfer kinetics than did GPE. In addition, GNFPE and GPE were tested as hydrogen peroxide and p-nicotinamide adenine dinucleotide (NADH) probes and the excellent experimental results further demonstrated the remarkable electrochemical advantages of GNFPE compared with GPE for analytical applications. (C) 2010 Elsevier B.V. All rights reserved.