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Polypyrrole electrolytic synthesis method

A technology of electrolytic synthesis and polypyrrole, which is applied in the direction of electrolytic process, electrolytic components, electrolytic organic production, etc., can solve the problem of low catalytic activity, and achieve the effect of low preparation cost, good electrocatalytic oxidation characteristics, and simple electrolytic synthesis method

Active Publication Date: 2013-12-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect of low electrocatalytic activity of polypyrrole to small organic molecules in the prior art, the invention provides an electrolytic synthesis method of polypyrrole

Method used

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  • Polypyrrole electrolytic synthesis method
  • Polypyrrole electrolytic synthesis method
  • Polypyrrole electrolytic synthesis method

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Effect test

Embodiment 1

[0022] The raw material for the polymerization monomer is pyrrole with a concentration of 0.4mol / L. The pyrrole is purified by distillation before the experiment. 1-ethylimidazole trifluoroacetate serves as both a solvent and an electrolyte. The platinum electrode is a working electrode. Before the experiment, the platinum electrode needs to be burned to remove the impurities adsorbed on the surface, and then ultrasonically cleaned with acetone and double-distilled water; the large-area platinum plate is both a reference electrode and an auxiliary electrode. The polypyrrole was prepared by cyclic voltammetry, the scanning speed was 50mV / s, and the scanning potential range was 0-1.2V. The prepared polypyrrole is rinsed with distilled water and dried in a vacuum drying oven at 40° C. to obtain a dark brown conductive polymer of polypyrrole.

[0023] Reference figure 1 Through scanning electron microscopy, it is found that the structure of polypyrrole is very flat and regular, comp...

Embodiment 2

[0026] The raw material for the polymerization monomer is pyrrole with a concentration of 0.3 mol / L. The pyrrole is purified by distillation before the experiment. 1-ethylimidazole trifluoroacetate serves as both a solvent and an electrolyte. The platinum electrode is a working electrode. Before the experiment, the platinum electrode needs to be burned to remove the impurities adsorbed on the surface, and then ultrasonically cleaned with acetone and double-distilled water; the large-area platinum plate is both a reference electrode and an auxiliary electrode. The polypyrrole is prepared by the constant current method, and the polymerization current density is 0.5mA / cm 2 . The prepared polypyrrole is rinsed with distilled water and dried in a vacuum drying oven at 50° C. to obtain a dark brown conductive polymer of polypyrrole.

[0027] image 3 It shows that the polypyrrole electrode synthesized under the conditions of this example has good electrocatalytic activity for ethanol....

Embodiment 3

[0029] The raw material for the polymerization monomer is pyrrole with a concentration of 0.4mol / L. The pyrrole is purified by distillation before the experiment. 1-ethylimidazole trifluoroacetate serves as both a solvent and an electrolyte. The platinum electrode is a working electrode. Before the experiment, the platinum electrode needs to be burned to remove the impurities adsorbed on the surface, and then ultrasonically cleaned with acetone and double-distilled water; the saturated calomel electrode is the reference electrode, and the large-area platinum plate is the auxiliary electrode. The polypyrrole was prepared by constant potential electrolysis, and the polymerization potential was 1.0V. The prepared polypyrrole is rinsed with distilled water and dried in a vacuum drying oven at 40° C. to obtain a dark brown conductive polymer of polypyrrole.

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Abstract

The invention discloses an electrolyzing synthesizing method of polypyrrole, which comprises the following steps: dissolving pyrrole monomer in the Bronsted acid typed ionic liquid; placing in the electrolyser with working electrode, auxiliary electrode and reference electrode; selecting working electrode from stainless steel electrode or platinum electrode or nickel electrode or glass-carbon electrode; selecting the auxiliary electrode from platinum electrode or graphite electrode with large area; selecting reference electrode from Ag / AgCl electrode or saturated calomel electrode or large area of platinum electrode or standard hydrogen electrode.

Description

(1) Technical field [0001] The invention relates to an electrolytic synthesis method of polypyrrole. (2) Background technology [0002] Polypyrrole has the advantages of good conductivity, low price and convenient preparation. Since its first invention 30 years ago, its research and application have become more and more extensive. Polypyrrole has many excellent properties, among which electrocatalytic performance is one of the important properties. Domestic and foreign literature shows that polypyrrole has good electrocatalytic activity for vitamin C. However, polypyrrole synthesized in aqueous solution has almost no electrocatalytic activity on small organic molecules such as methanol and ethanol. Moreover, polypyrrole synthesized in aqueous solution is easily degraded by -OH radical attack in water, and its stability is low. [0003] Improving the electrocatalytic oxidation of small organic molecules such as methanol, ethanol, and formic acid is very important for the developme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C08G73/06
Inventor 李美超马淳安
Owner ZHEJIANG UNIV OF TECH
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