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Citation: Mu Shao-Lin, Yang Yi-Fei, Tan Zhi-An. The Electrocatalytic Oxidation of Hydrogen Peroxide on Polyaniline Doped with Ferrocenesulfonic Acid[J]. Acta Physico-Chimica Sinica, ;2003, 19(07): 588-592. doi: 10.3866/PKU.WHXB20030704 shu

The Electrocatalytic Oxidation of Hydrogen Peroxide on Polyaniline Doped with Ferrocenesulfonic Acid

1.
Department of Chemistry, Yangzhou University, Yangzhou　225002

Received Date: 27 November 2002
Available Online: 15 July 2003

Polyaniline（PAnFc） synthesized in a presence of ferrocenesulfonic acid and polyaniline（PAn） synthesized in the absence of ferrocenesulfonic acid can catalyze the electrochemical oxidation of hydrogen peroxide in a buffer solution with pH 5.0, but the catalytic activity of PAnFc is higher than that of PAn.Evidence for this catalytic effect is that the oxidation potential of hydrogen peroxide shifts from 0.59 V on the bare platinum electrode to 0.48 V （vs SCE） on the PAnFc electrode, and the anodic peak current of hydrogen peroxide on the PAnFc electrode is 5.3 times as high as that on the bare platinum electrode. Based on this catalytic property, both PAn and PAnFc were used for immobilization of glucose oxidase to fabricate the enzyme electrodes. The experimental results indicate that the response current of the PAnFc enzyme electrode is much higher than that of the PAn enzyme electrode, the response time of PAnFc enzyme electrode is shorter than that of the PAn enzyme electrode. This is due to the fact that the electrochemical activity of PAnFc is higher than that of PAn in the buffer solution with pH 5.0 and ferrocenesulfonic acid doped into polyaniline plays an important role in the charge transfer.
- Polyaniline doped with ferrocenesulfonic acid;Electrocatalysis;　Hydrogen peroxide;Glucose oxidase electrode
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