SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES

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SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES

Papers | Updated：2021-06-21

- SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES
- Vol. 20, Issue 6, Pages: 517-524(2002)
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- Published：20 December 2002
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SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES[J]. 2002, 20(6): 517-524.
DOI：

SYNTHESIS OF POLYCATECHOL WITH ELECTROCHEMICAL ACTIVITY AND ITS PROPERTIES[J]. 2002, 20(6): 517-524. DOI：

摘要

The electrochemical polymerization of catechol on platinum has been carried out using repeated potential cyclingbetween-0.2 and 1.1 V (versus SCE). The electrolytic solution consisted of 0.2 mol dm-3 catechol

0.5 mol dm-3 NaCl and0.1 mol dm-3 Na2HPO4 with pH 8.72. Catechol can not be polymerized at pH≥10.12. Polycatechol has an electrochemicalactivity at pH≤4. The anodic and cathodic peak potentials of polycatechol shift towards more negative values as the pH of the solution increases from 1 to 4.The electrochemical activity of polycatechol hardly changes in this pH region

but it decreases slowly with time.This is caused by oxygen in air

which leads to an irreversible oxidation of polycatechol.This property is favorable for protecting metals from corrosion.Raman and FTIR spectra of polycatechol and catechol are quite different.AFM images of polycatechol films provide evidence that the image of the oxidized state of polycatechol is markedly different from that of the reduced one.This difference is caused by doping and dedoping of polycatechol.

Abstract

but it decreases slowly with time.This is caused by oxygen in air

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