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Methanol electro-oxidizing-catalyzing electrode, preparing process and application thereof

A catalytic electrode and electro-oxidation technology, applied in the direction of material electrochemical variables, etc., can solve the problems of low polymerization oxidation potential, difficulty in molecular chain growth, polymer peroxidation, etc., and achieve small adsorption capacity, lower methanol oxidation potential, and conductivity small effect

Inactive Publication Date: 2008-12-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the polymerization oxidation potential of aniline monomers with electron-donating substituents is low. When chemical oxidation polymerization is used, it is easy to cause polymer overoxidation in a strong oxidative polymerization medium, and if the monomer is oxidized to a quinone structure, it is difficult to carry out the integration with The coupling of active growing chains leads to difficulty in molecular chain growth and low molecular weight of products, so the selection of polymerization conditions and methods is very important

Method used

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  • Methanol electro-oxidizing-catalyzing electrode, preparing process and application thereof
  • Methanol electro-oxidizing-catalyzing electrode, preparing process and application thereof
  • Methanol electro-oxidizing-catalyzing electrode, preparing process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve PDMAn(HCl) in DMF to make a DMF solution with a concentration of 3.0mg / mL, and use a micro-vortex mixer to aid in dissolution; take a certain amount of polymer solution and coat it on the surface of a platinum disk electrode, and place it in an infrared rapid drying box Internal drying for 15 minutes, the polymer film modified electrode is obtained, and the adhesion amount of the polymer on the electrode surface is 0.3 mg·cm -2 .

[0032] In the single-chamber electrolytic cell, the polymer membrane modified electrode is used as the working electrode, the platinum sheet electrode is used as the auxiliary electrode, and the saturated calomel electrode is used as the reference electrode. The experiment was carried out on a CHI660 electrochemical comprehensive tester, and its attached computer software can be used for the collection and processing of experimental data. The above-mentioned PDMAn(HCl) polymer membrane modified electrode was placed in 1.0mg / mLH 2 P...

Embodiment 2

[0037] PDMAn(HClO 4 ) was dissolved in DMF, and dissolved with a micro-vortex mixer with a concentration of 5.0 mg / mL; a certain amount of polymer solution was coated on the surface of a platinum disk electrode, and dried in an infrared rapid drying oven for 15 minutes to obtain the polymer Membrane modified electrode, the adhesion amount of polymer on the electrode surface is 0.6mg·cm -2 .

[0038] In the single-chamber electrolytic cell, the polymer membrane modified electrode is used as the working electrode, the platinum sheet electrode is used as the auxiliary electrode, and the saturated calomel electrode is used as the reference electrode. The experiment was carried out on a CHI660 electrochemical comprehensive tester, and its attached computer software can be used for the collection and processing of experimental data. The above PDMAn (HClO 4 ) polymer membrane modified electrode placed in 1.0mg / mL H 2 PtCl 6 In the 1.0mol / L HCl solution, the potential cycle scann...

Embodiment 3

[0040] Dissolve PDMAn (TSA) in DMF, and use a micro-vortex mixer to aid dissolution, with a concentration of 13.0 mg / mL; take a certain amount of polymer solution and coat it on the surface of a platinum disk electrode, and dry it in an infrared rapid drying oven for 15 minutes. The polymer film modified electrode was obtained, and the adhesion amount of the polymer on the electrode surface was 0.8 mg·cm -2 .

[0041] In the single-chamber electrolytic cell, the polymer membrane modified electrode is used as the working electrode, the platinum sheet electrode is used as the auxiliary electrode, and the saturated calomel electrode is used as the reference electrode. The experiment was carried out on a CHI660 electrochemical comprehensive tester, and its attached computer software can be used for the collection and processing of experimental data. The above-mentioned PDMAn (TSA) polymer membrane modified electrode was placed in 1.0 mg / mL H 2 PtCl 6 In a 1.0mol / L HCl solution,...

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Abstract

A methanol electro-oxidation catalytic electrode, its preparation method and application thereof, relates to a metallized film modified electrode, provides a methanol electro-oxidation catalytic electrode and a preparation method, and uses it as an electrochemical sensor for catalyzing methanol electro-oxidation. It is a polyaniline derivative poly2,5-dimethoxyaniline metallized film modified electrode with a strong electron-donating group, including an inert electrode substrate, a conductive polymer film and a catalyst, and the adhesion amount of the polymer on the surface of the substrate electrode is 0.3~ 1.0 mg·cm -2 . The steps are as follows: dissolving hydrochloric acid-doped PDMAn in N, N-dimethylformamide or tetrahydrofuran to prepare a solution of 1.0-10.0 mg / ml, taking the polymer solution and coating the electrode surface, and drying. Adjust the amount of polymer attached to the electrode surface by changing the number of coatings; place the electrode in H 2 PtCl 6 or K 2 PtCl 6 In the HCl solution, the modified electrode with different platinum deposition amount was obtained by using controlled potential cyclic scanning or unidirectional scanning, and changing the number of times.

Description

technical field [0001] The invention relates to a metallized film modified electrode, in particular to a polyaniline derivative poly2,5-dimethoxyaniline metallized film modified electrode with a strong electron-donating group and its preparation method, and it is used as a catalyst for methanol Electrochemical sensors for electrooxidation. Background technique [0002] Methanol, a chemical raw material, is a poisonous substance. When the human body ingests too much at one time, it will cause severe poisoning symptoms such as vomiting, abdominal pain, visual impairment, and shortness of breath, and eventually cause people to lose consciousness and die. Counterfeit alcohol made from methanol-containing industrial alcohol has blinded or killed many consumers. At present, the determination of methanol content mainly adopts gas chromatography, spectrophotometry and electrocatalysis. [0003] Depositing platinum (Pt) on a carrier to prepare an electrochemical catalyst suitable f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C08G73/02
Inventor 戴李宗许一婷陈江枫吴辉煌
Owner XIAMEN UNIV
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