Electrospun carbon fibers (CFs) with diameters of 39nm (CF39nm), 158nm (CF158nm), and 309nm (CF309nm) were used as Pt-catalyst supports for a glucose oxidation reaction. Based on experimentally balanced comparisons using electrochemical methods, CF39nm with higher curvature and smaller diameter had a greater number of Pt atoms on the surface. Compared with the CF158nm and CF309nm systems, CF39nm has a higher electrochemically real surface area and greater catalytic activity on glucose oxidation. The Tafel analyses demonstrated that the exchange current density from an early rest potential (-0.81V) for the CF39nm system was 9.08×10-3mAcm-2, greater than 8.41×10-3mAcm-2 for CF158nm-supported Pt nanoparticles and 7.39×10-3mAcm-2 for CF309nm-supported Pt nanoparticles. In addition, as data supporting the catalytic characterization for glucose oxidation, all of the CF-supported Pt nanoparticles showed remarkable tolerance to foreign substances in the application of a non-enzymatic glucose sensor, where CF39nm-supported Pt nanoparticles (Pt/CF39nm) showed a higher sensitivity (2.03μAmM-1cm-2), detection limit (33μM), and linear range (0.3-17mM). The high recovery by serum sample analyses further confirmed the potential of Pt/CF39nm as a glucose sensor. The promising results showed the feasibility of these electrospun CFs being applied for both glucose fuel cells and non-enzymatic glucose sensors.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering