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Catalyst, preparation method thereof, cathode and electrochemical system

A catalyst and electrochemical technology, applied in the fields of materials, energy, and the environment, can solve the problems to be improved, and achieve the effect of avoiding clogging of catalytic sites, good electricity production performance, and avoiding the decrease of electrical conductivity.

Active Publication Date: 2019-01-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current electrochemical systems, catalysts and cathodes still need to be improved

Method used

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  • Catalyst, preparation method thereof, cathode and electrochemical system
  • Catalyst, preparation method thereof, cathode and electrochemical system
  • Catalyst, preparation method thereof, cathode and electrochemical system

Examples

Experimental program
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Embodiment 1

[0130] Embodiment 1 prepares pure carbon fiber (Carbon fiber)

[0131] According to an embodiment of the present invention, the carbon fiber-based material is prepared through an electrospinning-preoxidation-carbonization process, wherein the precursor of the electrospinning is polyacrylonitrile (PAN). The production process of pure carbon fiber catalyst is as follows: take 1g of polyacrylonitrile and dissolve it in 10mL of dimethylformamide (DMF), stir it for about 24 hours to completely dissolve it, and then use this solution to perform electrospinning to obtain fibers. The voltage and negative voltage were 10kV each, a metal plate was used as the receiver, the distance between the needle and the receiver was 15cm, and the flow rate of the syringe was adjusted to 10μL / min. After spinning, the spun fibers were placed in air atmosphere and heated at 280°C for one hour at a heating rate of 1°C / min. After natural cooling, the color turned dark brown, indicating that the pre-oxid...

Embodiment 2

[0132] Embodiment 2 prepares carbon-iron composite fiber (C-Fe fiber)

[0133] Other preparation methods are the same as in Example 1, the difference is that 1g Fe(acac) is added in 10mL spinning precursor solution 3 , that is, iron can be incorporated into the final fiber material.

Embodiment 3

[0134] Embodiment 3 prepares the carbon fiber (Z-C fiber) of ZIF-8 modification

[0135] Other preparation methods were the same as in Example 1, except that 0.59 g of zinc nitrate hexahydrate was dissolved in 4 mL of deionized water; 11.35 g of 2-methylimidazole was dissolved in 40 mL of deionized water; the two were mixed and stirred for 5 minutes to synthesize ZIF-8. After the synthesis, wash with DMF and centrifuge for 2 to 3 times. After washing, take 0.2g of the obtained white powder and ultrasonically disperse it in DMF. After it forms a uniform suspension, weigh 1g of PAN and dissolve it in the solution for spinning. silk can be.

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Abstract

The invention provides a catalyst, a preparation method thereof, a cathode and an electrochemical system. Specifically, the invention provides a catalyst capable of catalyzing the production of hydrogen peroxide, the catalyst comprising carbon fibers on which metals-organic frame compounds and iron are modified.. Thus, metals are modified on carbon fibers-Organic framework compounds and iron can significantly improve the electrocatalytic performance of carbon fiber materials, so the catalyst has excellent electrocatalytic performance; Moreover, the catalyst can be used to catalyze the reduction of oxygen in the air cathode to produce hydrogen peroxide, which improves the performance of the air cathode. Moreover, the air cathode can be used in the electrochemical system to improve the powergeneration performance and water purification effect of the electrochemical system.

Description

[0001] priority information [0002] This application claims the priority and rights of the patent application No. 201810619476.1 filed with the State Intellectual Property Office of China on June 15, 2018, and is hereby incorporated by reference in its entirety. technical field [0003] The invention relates to the fields of environment, material and energy, and specifically, the invention relates to a catalyst, a preparation method thereof, a cathode and an electrochemical system. Background technique [0004] Environmental issues and energy issues are two major problems facing the development of contemporary society. Purifying sewage while taking into account energy recovery is a new challenge for sewage treatment technology. The electrochemical system is used for sewage treatment, and the electrochemical reaction can be used to form strong oxidizing substances such as hydroxyl radicals, so as to purify sewage. [0005] However, the current electrochemical systems, catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/16C02F1/46C02F1/72
CPCC02F1/46C02F1/725H01M4/9008H01M4/9041H01M4/9083H01M8/16Y02E60/50
Inventor 张潇源董恒黄霞梁鹏
Owner TSINGHUA UNIV
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