Abstract
Superfine-fibrous polyaniline (PANI) was synthesized on stainless steel electrode (SS) and superfine-fibrous PANI films modified with highly dispersed platinum microparticles [Pt/(superfine-fibrous PANI)/ SS] were studied in the electrocatalytic oxidation of hydrogen peroxide. The results showed that PANI films have superfine-fibrous microstructure and Pt microparticles with a diameter of 50-100nm dispersed homogeneously on PANI superfine-fibers. The Pt/(superfine-fibrous PANI)/SS electrode has excellent electrocatalytic activity for H2O2 oxidation. In addition, a glucose biosensor based on the detection of hydrogen peroxide was prepared by electropolymerization of m-phenylenediamine onto the Pt-dispersed superfine-fibrous PANI film in the presence of glucose oxidase. The enzyme electrode has excellent performance with a very large steady-state current density of 917.4 μA/cm2 and the Michaelis-Menten constant of 9.339 mmol/L. A fast amperometric response time to glucose and good anti-interference to uric acid and ascorbic acid have also been observed.
| Original language | English |
|---|---|
| Pages (from-to) | 1445-1449 |
| Number of pages | 5 |
| Journal | Fenxi Huaxue/ Chinese Journal of Analytical Chemistry |
| Volume | 32 |
| Issue number | 11 |
| State | Published - Nov 2004 |
Keywords
- Biosensor
- Electrodepositing platinum microparticles
- Glucose oxidase
- m-phenylenediamine
- Superfine-fibrous polyaniline