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Reductive determination of hydrogen peroxide with MWCNTs-Pd nanoparticles on a modified glassy carbon electrode
- You, Jung-Min, Jeong, Yu Na, Ahmed, Mohammad Shamsuddin, Kim, Seul Ki, Choi, Hyun Chul, Jeon, Seungwon
- Biosensors & bioelectronics 2011 v.26 no.5 pp. 2287-2291
- X-ray photoelectron spectroscopy, biosensors, carbon nanotubes, detection limit, glassy carbon electrode, hydrogen peroxide, nanoparticles, palladium, transmission electron microscopy
- This paper introduces the use of multi walled carbon nanotubes (MWCNTs) with palladium (Pd) nanoparticles in the electrocatalytic reduction of hydrogen peroxide (H₂O₂). We have developed and characterized a biosensor for H₂O₂ based on Nafion® coated MWCNTs-Pd nanoparticles on a glassy carbon electrode (GCE). The Nafion®/MWCNTs-Pd/GCE electrode was easily prepared in a rapid and simple procedure, and its application improves sensitive determination of H₂O₂. Characterization of the MWCNTs-Pd nanoparticle film was performed with transmission electron microscopy (TEM), Raman, and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) and amperometry (at an applied potential of −0.2V) measurements were used to study and optimize performance of the resulting peroxide biosensor. The proposed H₂O₂ biosensor exhibited a wide linear range from 1.0μM to 10mM and a low detection limit of 0.3μM (S/N=3), with a fast response time within 10s. Therefore, this biosensor could be a good candidate for H₂O₂ analysis.