A nonenzymatic hydrogen peroxide sensor based on Pt/PPy hollow hybrid microspheres

Abstract

Abstract The surface of silica particles was NH 2  functionalized by 3‐aminopropyltrimethoxysilane, then the platinum/polypyrrole hybrid hollow microspheres were prepared by treating the SiO 2 template decorated by the H 2 PtCl 6 via the NH 2  group with pyrrole vapor and developed as hydrogen peroxide (H 2 O 2 ) sensor. The platinum/polypyrrole hybrid hollow sphere materials were characterized by transmission electron microscopy and infrared spectroscopy, and the catalytic electrodes were investigated by electrochemical method. The results showed that the nonenzymatic sensor displayed a good electro‐catalytic response and high sensitivity to the oxidation of H 2 O 2 , and the resulting sensor showed a wide linear range from 1.9 to 9.7 m M H 2 O 2 . The obvious response could be still observed in i–t curve when the concentration of H 2 O 2 was as low as 1.0 μ M . © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012