Glucose oxidase-loaded amorphous FeNi-Pt fan-shaped nanostructures and their electrochemical behaviors.

Glucose oxidase (GOD) loaded amorphous FeNi-Pt fan-shaped nanostructures with the average length of ∼ 7 μm have been synthesized for improving the electrochemical activity of enzyme electrode materials. The electrochemical oxidation of glucose solution has been successfully facilitated using FeNi-Pt fan-shaped nanostructures to load GOD due to their fan-shaped constitution and amorphous nanostructure. Chitosan could provide better response of nanostructure electrode than nafion. Compared with glassy carbon electrode (GCE) modified by chitosan/Fe(40)Ni(40)-Pt(20)/GOD/GCE (GOD-loaded Fe(40)Ni(40)-Pt(20) nanoalloys using chitosan as immobilization-agent), chitosan/Fe(45)Ni(45)-Pt(10)/GOD/GCE presents smaller oxidation and reduction peak potential separation at 0.2912 V. No any electrochemical response can be observed when FeNi-Pt was absent in this electrode system. Additionally, a group of parallel experiments were tested when chitosan was changed to nafion. When Fe(40)Ni(40)-Pt(20) nanostructure was employed to the electrode system, the oxidation and reduction peaks potentials were -0.7341 V and -0.4943 V, respectively, with a peak potential separation of 0.3371 V.