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Compound oxygen reduction electro-catalyst of carbon nano materials modified by macrocyclic compound containing nitrogen and preparation method thereof

A technology of macrocyclic compounds and carbon nanomaterials, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of weak interaction between modified molecules and carrier materials , poor stability and anti-poisoning ability, low catalytic activity, etc., to achieve the effect of low preparation cost, good oxygen reduction catalytic activity, and improved catalytic activity

Inactive Publication Date: 2010-06-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, catalysts composed of nitrogen-containing macrocyclic compounds and ordinary materials have low catalytic activity, poor stability and poisoning resistance.
This is mainly because the composite effect of the two materials is poor, and the force between the modified molecules and the carrier material is not strong

Method used

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  • Compound oxygen reduction electro-catalyst of carbon nano materials modified by macrocyclic compound containing nitrogen and preparation method thereof
  • Compound oxygen reduction electro-catalyst of carbon nano materials modified by macrocyclic compound containing nitrogen and preparation method thereof
  • Compound oxygen reduction electro-catalyst of carbon nano materials modified by macrocyclic compound containing nitrogen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dissolve 0.1mg of nickel phthalocyanine in 10ml of N,N-dimethylformamide, then add 1mg of carbon nanotubes, shake well, 60KHz ultrasonic compound for 24 hours, filter under reduced pressure and wash the filtrate with deionized water until it is colorless, The filter cake was dried at 80° C. for 12 hours, and cooled to obtain a composite oxygen reduction electrocatalyst of nickel phthalocyanine-modified carbon nanotubes. figure 1 is the scanning electron microscope image of blank carbon nanotubes, figure 2 It is a scanning electron micrograph of carbon nanotubes modified with nickel phthalocyanine. from figure 2 It can be clearly seen that nickel phthalocyanine can be well adsorbed on the surface of carbon nanotubes to form a composite oxygen reduction electrocatalyst of nickel phthalocyanine modified carbon nanotubes.

Embodiment 2

[0041] Dissolve 0.2mg of copper phthalocyanine in 40ml of chloroform, then add 4mg of carbon nanoparticles, shake well, 60KHz ultrasonic compound for 24 hours, filter under reduced pressure and wash the filtrate with deionized water until it is colorless, and dry the filter cake at 80°C for 12 hours, cooling to obtain a composite oxygen reduction catalyst of copper phthalocyanine modified carbon nanoparticles. image 3 It is the Fourier transform infrared spectrogram of copper phthalocyanine (line c in the figure), carbon nanoparticles (line a in the figure) and the composite catalyst of copper phthalocyanine modified carbon nanoparticles (line b in the figure). It can be seen from the figure that the blank carbon nanotube (line a in the figure) basically has no absorption peak. When copper phthalocyanine is modified on carbon nanoparticles to form a complex, the characteristic absorption peak of copper phthalocyanine obviously appears on the composite oxygen reduction catalys...

Embodiment 3

[0043] Dissolve 0.2mg of iron phthalocyanine in 20ml of water, then add 4mg of carbon nanotubes, shake well, 50KHz ultrasonic compound for 18 hours, filter under reduced pressure and wash the filtrate with deionized water until it is colorless, and dry the filter cake at 80°C for 12 hours , cooling to obtain a composite oxygen reduction catalyst. Disperse 2mg of the prepared composite oxygen reduction electrocatalyst in 1ml of 0.1% Nafion solution to obtain 2mg.mL -1 oxygen reduction electrocatalyst solution. 5 μL of the solution was dropped onto the surface of a glassy carbon electrode (3 mm in diameter), and the electrode was dried at room temperature to obtain a modified electrode containing a composite oxygen reduction electrocatalyst. With the modified electrode as the working electrode, an electrochemical workstation (Shanghai Chenhua Electrochemical Instrument Co., Ltd., CHI660C) and a standard three-electrode system (platinum wire as the auxiliary electrode, and an Ag...

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Abstract

The invention discloses a compound oxygen reduction electro-catalyst of carbon nano materials modified by macrocyclic compound containing nitrogen and a preparation method thereof, wherein the catalyst is prepared by mixing the macrocyclic compound containing nitrogen and the carbon nano materials completely, and has excellent catalytic activity and stability in cyclic voltammetry. The peak potential of the catalyzing oxygen reduction reaction can reach -0.1V (vs. Ag / Agcl); the peak current density of the oxygen reduction can reach 3.4mA.cm<-2>; the catalyst has stable catalytic activity which is basically not attenuated after 10000 times of cyclic voltammetry; the current generated in the catalyzing oxygen reduction reaction is not affected by the additional organic micromolecules (such as glucose, methanol and formaldehyde) and carbon monoxide. The electro-catalyst has simple preparation process, low cost, and good catalytic activity, selectivity, mithridatism and stability, can be applied to biomembrane electrode reactors, biosensors, fuel cells and other fileds.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to an oxygen reduction electrocatalyst composed of nitrogen-containing macrocyclic compounds and carbon nanomaterials and a preparation method thereof. Background technique [0002] In recent years, research on the application of oxygen gas diffusion electrodes in various batteries, metal / air electrodes, membrane electrode reactors and even sensors has been very active, and the catalytic reaction layer of the air electrode is its most important component. As an oxidizing agent, molecular oxygen will not cause pollution and is an excellent green oxidizing agent. [0003] In addition, with the sharp increase in fossil fuel consumption and the depletion of energy reserves, it is very important for human beings to find environmentally friendly and sustainable energy. Among them, the fuel cell is currently a hot research direction, and the cathode oxygen reduction efficiency is of g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/02H01M4/90
CPCY02E60/50
Inventor 叶建山莫光权张叶臻李旭文
Owner SOUTH CHINA UNIV OF TECH
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