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Co-N-C composite material based on Bio-MOF-11 as well as preparation and application thereof

A technology of bio-mof-11 and composite materials, applied in the direction of catalyst activation/preparation, chemical instruments and methods, electrical components, etc., can solve the problems of high cost, slow reverse reaction activity, etc., and achieve high electrochemical stability, The preparation process is environmentally friendly and the experimental design is ingenious

Inactive Publication Date: 2018-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Pt and Ru / Ir are cost-prohibitive due to their limited resources, and slow reverse reaction activity is indispensable for rechargeable metal-air battery systems with charge / discharge cycles.

Method used

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  • Co-N-C composite material based on Bio-MOF-11 as well as preparation and application thereof
  • Co-N-C composite material based on Bio-MOF-11 as well as preparation and application thereof
  • Co-N-C composite material based on Bio-MOF-11 as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A Co-N-C composite material based on Bio-MOF-11 is obtained by high-temperature carbonization of Bio-MOF-11, and the Bio-MOF-11 is obtained by reacting cobalt acetate and adenine.

[0030] The preparation method of the Co-N-C composite material based on Bio-MOF-11 comprises:

[0031] 1. Hydrothermal reaction of cobalt acetate and adenine to obtain Bio-MOF-11:

[0032] (1) Mix cobalt acetate and adenine and dissolve in 10 mL of N,N-2 methylformamide, the mass ratio of cobalt acetate and adenine is 1:3;

[0033] (2) Pour the obtained homogeneous mixture into a 50mL polytetrafluoroethylene lining, seal the lining reactor in a stainless steel autoclave, heat it in an oven to 120°C, and then keep it at a constant temperature for 10h;

[0034] (3) After naturally cooling to room temperature, open the lined reactor and pour off the supernatant, add a small amount of distilled water to the remaining white precipitate, centrifuge after stirring, then wash with distilled water a...

Embodiment 2

[0040] Similar to Example 1, the difference from Example 1 is that the carbonization temperature is 600° C., and the finally obtained composite material is denoted as Co-N-C-1.

Embodiment 3

[0042] Similar to Example 1, the difference from Example 1 is that the carbonization temperature is 800° C., and the finally obtained composite material is denoted as Co-N-C-2.

[0043] Use X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), electrochemical workstation to characterize, the morphology structure and the electrochemical performance of the Co-N-C composite material that the present invention prepares, its The result is as follows:

[0044] (1) XRD results showed that the synthesized MOF was indeed Bio-MOF-11. ( figure 1 )

[0045] (2) SEM test results show that the Co-N-C composite material prepared in the present invention is the morphology of carbon nanospheres in situ grown carbon tubes after MOF carbonization, and as the calcination temperature increases, the aggregated form becomes more and more serious. ( figure 2 )

[0046] (3) TEM test results show that in the Co-N-C composite material prepared in ...

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PUM

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Abstract

The invention provides a Co-N-C composite material based on Bio-MOF-11 as well as preparation and application thereof. The Co-N-C composite material based on Bio-MOF-11 is characterized by being prepared from Bio-MOF-11 by virtue of high temperature carbonization, and Bio-MOF-11 is obtained by reaction between cobalt acetate and adenine. Biological MOF is prepared by virtue of metal organic coordination, and then, a high temperature carbonization technology is adopted to obtain a transition metal nitrogen-doped carbon material with high catalytic activity. The prepared Co-N-C composite material has higher ORR performance and electrochemical stability and simultaneously is an ideal zinc-air battery catalyst.

Description

technical field [0001] The invention relates to a Co-N-C composite material based on Bio-MOF-11 and its preparation and application, belonging to the technical field of electrocatalytic nanomaterials. Background technique [0002] Metal-air batteries were used as portable power sources in railways and postal and telecommunications systems as early as World War I. It is a "semi-fuel" battery between a primary battery and a fuel cell. It has the characteristics of both a fuel cell and a battery, and has the advantages of large capacity, high specific energy, low cost, and stable discharge. The power source of huge market prospect. The level of electrode catalytic activity and lifetime are one of the key factors restricting Zn-air batteries. Pt-based electrocatalysts (such as Pt / C) show the highest activity for HER and ORR, while Ru / Ir-based materials are used for State-of-the-art electrocatalysts for OER. However, Pt and Ru / Ir are cost-prohibitive due to their limited resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/08B01J37/10H01M4/90
CPCH01M4/9083B01J27/24B01J37/086B01J37/10B01J35/396B01J35/393B01J35/33Y02E60/50
Inventor 张超李倩倩刘天西郭和乐封其春刘思良
Owner DONGHUA UNIV
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