A Simple and High-Performance Hydrazine Sensor Based on Graphene Nano Platelets Supported Metal Nanoparticles

Abstract:

Gold-palladium nanoparticles (AuPd NPs) were prepared on a layer of graphene (GR) film by potentiostatic electrodeposition from a mixture electrolyte of HAuCl₄ and H₂PdCl₄ to fabricate the AuPd NPs/graphene/glass carbon electrode (AuPd/GR/GCE). The synthesized composite has been characterized using scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). Electrocatalytic oxidation of hydrazine on the surface of modified electrode was investigated with cyclic voltammetry and chronoamperometry methods, the results showed that the AuPd NPs high catalysis for the electrochemical oxidation of hydrazine and the excellent conductivity of graphene. Electrocatalytic activity of the modified electrode was investigated for the oxidation of hydrazine in 0.1 M phosphate buffer solutions (pH=6.0). Under the optimized conditions, the oxidation current of hydrazine was linear to its concentration in the range of 2185 μM, and the estimated detection limit was 0.2 μM (S/N =3).

• Periodical: Advanced Materials Research (Volume 704)
• Pages: 246-251
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.704.246
• Online since: June 2013
• Authors: Yi Liu, Bei Bei Li, Wei Wei, Qi Jin Wan, Nian Jun Yang
• Keywords: AuPd Nanoparticles, Electro-Deposition, Graphene (GR), Hydrazine

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