Diameter effect of electrospun carbon fiber support for the catalysis of Pt nanoparticles in glucose oxidation

作者：Ye Jyun Sian; Liu Zhe Ting; Lai Ching Chang; Lo Chieh Tsung^*; Lee Chien Liang

来源：Chemical Engineering Journal, 2016, 283: 304-312.

DOI：10.1016/j.cej.2015.07.071

• Support effect
• Electrospinning
• Carbon fibers
• Glucose oxidation reaction

Electrospun carbon fibers (CFs) with diameters of 39 nm (CF39nm), 158 nm (CF158nm), and 309 nm (CF309nm) were used as Pt-catalyst supports for a glucose oxidation reaction. Based on experimentally balanced comparisons using electrochemical methods, CF39mn 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 (-0.81 V) for the CF39nm system was 9.08 x 10(-3) mA cm(-2), greater than 8.41 x 10(-3) mA cm(-2) for CF158nm-supported Pt nanoparticles and 7.39 x 10(-3) mA cm(-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 (2.03 mu A mM(-1) cm(-2)), detection limit (33 mu M), and linear range (0.3-17 mM). 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.

• 出版日期2016-1-1