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Application of anti-corrosion electrode in improving the selectivity and yield of organic electrosynthesis reaction

A synthesis reaction and selectivity technology, applied in the direction of electrolytic organic production, electrolytic organic material coating, electrodes, etc., can solve the problems of low adhesion, low reaction efficiency, easy peeling of polyaniline protective film, etc., to avoid corrosion and slag , good selectivity, and increased capture and response capabilities

Active Publication Date: 2018-04-17
威海高新园区运营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polyaniline protective film itself is brittle and porous, and its adhesion to the substrate is relatively low. Therefore, if it is used in electrochemical organic synthesis, there is a problem that the polyaniline protective film is easy to fall off, and the reaction efficiency is not good. high

Method used

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  • Application of anti-corrosion electrode in improving the selectivity and yield of organic electrosynthesis reaction
  • Application of anti-corrosion electrode in improving the selectivity and yield of organic electrosynthesis reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Surface pretreatment of substrate electrodes:

[0027] Use an ultrasonic cleaner to clean the surface of the graphite substrate electrode to remove excess grease, dust and other impurities, then put it in an ethanol solution (95% concentration) for cleaning, take it out and dry it naturally, and keep it for later use.

[0028] (2) Preparation of the base electrode

[0029] Add 0.01 g of dopamine and 0.01 g of trometamol into 50 mL of distilled water, and then put them in an ultrasonic cleaner for 10 minutes of sonication to dissolve and disperse. After being uniformly dispersed, the pretreated electrodes were soaked in the solution for 4 hours and then dried.

[0030] (3) Preparation of electrolyte:

[0031] Take 25mL of 0.1mol / L aniline aqueous solution and 25mL of 1.0mol / L sulfuric acid solution into a 100mL beaker, and let it stand for later use.

[0032] (4) Coating on the surface of the base electrode:

[0033] At room temperature, in the electrolyte, the p...

Embodiment 2

[0045] (1) The surface pretreatment of the substrate electrode is the same as in Example 1.

[0046] (2) Preparation of the transition layer on the surface of the base electrode

[0047] Add 0.001g of octadecylamine into 50mL of distilled water, place it in an ultrasonic cleaner for 20 minutes of ultrasonic treatment to dissolve and disperse. After being uniformly dispersed, soak the pretreated electrode in the solution for 2 hours. Take it out to dry.

[0048] (3) Electrolyte preparation:

[0049]Take 25mL of 0.2mol / L pyrrole solution and 50mL of 1.0mol / L hydrochloric acid solution into a 100ml beaker and mix well.

[0050] (4) Coating on the surface of the base electrode:

[0051] At room temperature, in the electrolyte, the polypyrrole film is electroplated on the surface of the carbon electrode by cyclic voltammetry, wherein the carbon electrode is the working electrode, the platinum electrode is the counter electrode, the calomel electrode is the reference electrode, ...

Embodiment 3

[0060] (1) The surface pretreatment of the substrate electrode is the same as before.

[0061] (2) Preparation of the transition layer on the surface of the base electrode:

[0062] Add 0.05g of silane coupling agent to 50mL of distilled water, and put it in ultrasonic treatment for 10min to dissolve and disperse. After being uniformly dispersed, soak the treated electrode in the solution for 4 hours, take it out and dry it for later use.

[0063] (3) Electrolyte preparation:

[0064] Add 30 mL of 0.5 mol / L thiophene solution and 25 mL of 0.5 mol / L sulfuric acid solution into a 100 mL beaker and mix well.

[0065] (4) Electrode surface coating:

[0066] At room temperature, in the electrolyte solution, the nickel electrode is used as the anode, and the platinum electrode is used as the cathode. The system is electrolyzed with electricity. The electrolysis voltage is 3.0V and the electrolysis time is 2.0h. The surface morphology of the formed conductive polymer film is as fo...

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Abstract

The invention discloses an anticorrosion electrode for organic electrosynthesis. The anticorrosion electrode solves the problem that existing polyaniline protective film electrodes fall off easily and are poor in electrochemical activity. A transition layer is guided on an interface of a base electrode and a conducting polymer film through chemical additives of an appropriate proportion, conducting polymer monomers are promoted to form a film on the surface of the base electrode in an electrochemical polymerization mode, the binding force of the film is improved, and therefore the conducting polymer film with the corrosion prevention performance can protect the base electrode more effectively; meanwhile, the ability to capture and react to organic matter can be improved through a lot of active groups on the surface of the electrode, the reaction path can be shortened, reaction can be carried out efficiently, the electrooxidation performance of anode materials can be improved, the productivity of obtained target products is high, the selectivity of the obtained target products is good, and the requirement of efficient organic electrosynthesis can be met.

Description

technical field [0001] The invention relates to an electrode material for electrochemical synthesis, which is mainly used to improve the selectivity and yield of electrochemical synthesis reaction. Background technique [0002] The electrochemical synthesis process is favored due to its mild reaction and high selectivity. However, the electrolyte used in the synthesis is often a strong acid or a strong base. While these substances increase the conductivity of the solution, they are bound to cause serious corrosion to the electrode material. The environment of organic electrochemical synthesis is more severe, and the requirements for electrode materials are higher. Therefore, noble metal (platinum, palladium, etc.) electrode materials are usually used for electrochemical organic synthesis. However, on the one hand, noble metals are expensive, and on the other hand, noble metal electrodes only play the role of transporting electrons in electrochemical reactions, so the yield...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C25B11/04C25D9/02
CPCC25B3/00C25D9/02C25B11/075
Inventor 朱艳吉汪怀远金恺赵亚楠
Owner 威海高新园区运营管理有限公司
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