Pt-Pb nanowire array electrode for enzyme-free glucose detection.

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Electrochemical glucose oxidation is crucial for developing nonenzymatic glucose sensors.
• Developing efficient electrocatalysts for glucose oxidation in neutral conditions remains a challenge.

Purpose of the Study:

• To synthesize and characterize a platinum-lead (Pt-Pb) nanowire array electrode for direct glucose oxidation.
• To evaluate the electrocatalytic performance of the Pt-Pb nanowire array electrode (Pt-PbNAE) for nonenzymatic glucose sensing.

Main Methods:

• Pt-Pb nanowire arrays were synthesized using electrochemical deposition into a polycarbonate template.
• Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used for characterization.
• Cyclic voltammetry (CV) was employed to assess electrochemical performance.

Main Results:

• The 3D Pt-Pb nanowire array electrode exhibited high electrocatalytic activity for glucose oxidation in neutral conditions.
• The sensor achieved a sensitivity of 11.25 µA·mM⁻¹·cm⁻², linearity up to 11 mM, and a detection limit of 8 µM.
• A negative potential of -0.20 V effectively minimized interference from ascorbic acid.

Conclusions:

• The Pt-Pb nanowire array electrode is a promising candidate for nonenzymatic glucose sensors.
• The developed electrode offers high sensitivity and selectivity for glucose detection.
• This approach provides a viable strategy for fabricating advanced electrochemical sensors.