Journal
MICROCHIMICA ACTA
Volume 171, Issue 1-2, Pages 125-131Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-010-0383-4
Keywords
Polypyrrole nanowires; Pt hollow nanospheres; Nonenzymatic sensor; Hydrogen peroxide
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Funding
- NNSF of China [20675064]
- Ministry of Education of China [708073]
- Natural Science Foundation of Chongqing City [CSTC-2009BA1003]
- High Technology Project Foundation of Southwest University, China [XSGX02]
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A nonenzymatic sensor for hydrogen peroxide has been fabricated by dispersing platinum hollow nanospheres onto polypyrrole (PPy) nanowires to form a PPy-Pt hollow sphere nanocomposite on a glassy carbon electrode. The materials were characterized by transmission electron microscopy and scanning electron microscopy. The process and the sensor were characterized by electrochemical impedance spectroscopy, cyclic voltammetry, and chrono-amperometry and revealed that the electrode has a large electroactive surface area and small resistance to electron transfer. The linear range for the determination of hydrogen peroxide is from 3.5 mu M to 9.9 mM, the detection limit is 1.2 mu M (S/N=3), and the response time is 3 s. The electrode exhibited good stability and excellent repeatability.
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