Electrochemical Behavior of Hydroquinone at a Gold Nanoparticle/Carbon Nanotube Modified Glassy Carbon Electrode

A gold nanoparticle/carbon nanotube modified glassy carbon electrode was prepared and used to study the electrochemical behaviors of hydroquinone.The results show that gold nanoparticle/carbon nanotube modified electrode exhibits synergistic electrochemical catalytic effects of carbon nanotube and gold nanoparticles on the electrochemical reactions of hydroquinone.The reversibility of the electrochemical reaction of hydroquinone was greatly improved and the intensity of electrochemical current of hydroquinone at the modified electrode was increased 6-times compared with that at a bare electrode.In low concentration range(5×10~(-5) mol/L), electrochemical reaction was controlled by diffusion process,while in high concentration range(5×10~(-4) mol/L), electrochemical reaction was controlled by adsorption process.Furthermore,the effect of the amount of carbon nanotube,the layers of composite film,and the scan rate were also studied.