Nitrogen-doped carbon porous hollow carbon catalyst, preparation method thereof and application thereof

A nitrogen-doped carbon and hollow carbon technology, applied in electrical components, regenerative fuel cells, battery electrodes, etc., can solve the problems of short life and high cost of electrode materials and catalysts, and achieve the effect of improving the transfer rate.

Active Publication Date: 2019-06-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the primary restrictive factor for the commercial development of electrochemical reduction of oxygen is the high cost and short life of the electrode material catalyst. Oxygen research focus

Method used

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  • Nitrogen-doped carbon porous hollow carbon catalyst, preparation method thereof and application thereof
  • Nitrogen-doped carbon porous hollow carbon catalyst, preparation method thereof and application thereof
  • Nitrogen-doped carbon porous hollow carbon catalyst, preparation method thereof and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of nitrogen-doped carbon porous hollow carbon catalyst comprises the following steps:

[0033] 1) Mix 2-methylimidazole and zinc nitrate at a mass ratio of 2:1, add the mixture to methanol, stir evenly, let stand for 24 hours, filter, dry, and obtain solid powder; 2-methylimidazole The ratio of the mass of methanol to the volume of methanol is 1:20, the unit of mass is g, and the unit of volume is mL.

[0034] 2) Add 0.15 g of the solid powder obtained in step 1) into 10 mL of deionized water, and mix evenly by ultrasonic to obtain the mixed solution A. The aqueous solution of tannic acid with a concentration of 0.04 g / mL was adjusted to pH 9 with sodium hydroxide to obtain a mixed solution B.

[0035] 3) The mixture A and mixture B obtained in step 2) were mixed at a volume ratio of 0.3:1, stirred for 8 min, and then centrifuged and dried to obtain a solid powder adsorbing tannate anions.

[0036] 4) Mix the solid powder obtained in step 3) with 1-but...

Embodiment 2

[0044] The preparation of nitrogen-doped carbon porous hollow carbon catalyst comprises the following steps:

[0045] 1) Mix 2-methylimidazole and zinc nitrate at a mass ratio of 2:1, add the mixture to methanol, stir evenly, let stand for 24 hours, filter, dry, and obtain solid powder; 2-methylimidazole The ratio of the mass of methanol to the volume of methanol is 1:20, the unit of mass is g, and the unit of volume is mL.

[0046] 2) Add 0.15 g of the solid powder obtained in step 1) into 10 mL of deionized water, and mix evenly by ultrasonic to obtain the mixed solution A. The aqueous solution of tannic acid with a concentration of 0.04 g / mL was adjusted to pH 9 with sodium hydroxide to obtain a mixed solution B.

[0047] 3) The mixture A and mixture B obtained in step 2) were mixed at a volume ratio of 0.3:1, stirred for 8 min, and then centrifuged and dried to obtain a solid powder adsorbing tannate anions.

[0048] 4) Mix the solid powder obtained in step 3) with 1-but...

Embodiment 3

[0053] The preparation of nitrogen-doped carbon porous hollow carbon catalyst comprises the following steps:

[0054] 1) Mix 2-methylimidazole and zinc nitrate at a mass ratio of 2:1, add the mixture to methanol, stir evenly, let stand for 24 hours, filter, dry, and obtain solid powder; 2-methylimidazole The ratio of the mass of methanol to the volume of methanol is 1:20, the unit of mass is g, and the unit of volume is mL.

[0055] 2) Add 0.15 g of the solid powder obtained in step 1) into 10 mL of deionized water, and mix evenly by ultrasonic to obtain the mixed solution A. The 0.04 g / mL tannic acid aqueous solution was adjusted to pH 9 with sodium hydroxide to obtain a mixed solution B.

[0056] 3) The mixture A and mixture B obtained in step 2) were mixed at a volume ratio of 0.3:1, stirred for 8 min, and then centrifuged and dried to obtain a solid powder adsorbing tannate anions.

[0057] 4) Mix the solid powder obtained in step 3) with 1-butyl-3-methylimidazolium tetr...

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Abstract

The invention discloses a nitrogen-doped carbon porous hollow carbon catalyst, a preparation method thereof and an application thereof. The preparation method of the catalyst comprises a step of mixing an imidazole substance with zinc salt, adding a mixture of the imidazole substance and the zinc salt into an alcohol solution, stirring to be uniform, and performing standing, filtration and drying,adding obtained solid powder into deionized water, ultrasonically mixing to be uniform to obtain a mixture liquid A, and a step of adjusting the pH value of an organic acid aqueous solution to 7 to 9with a strong base to obtain a mixture liquid B, step of mixing the mixture liquid A and the mixture liquid B, stirring to be uniform, performing centrifugal separation and drying to obtain solid powder adsorbing organic acid anions, then placing the solid powder adsorbing the organic acid anions and an ion liquid into a tube furnace, and performing high-temperature calcining in a high-purity atmosphere to finally obtain the nitrogen-doped carbon porous hollow carbon catalyst. The nitrogen-doped carbon porous hollow carbon catalyst prepared by the invention has high electrocatalytic activityand superior stability, and the verification shows the performance of electrochemical reduction of oxygen by the catalyst of the invention is better than that of commercial platinum carbon.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon porous hollow carbon catalyst and its preparation method and application. Background technique [0002] The two eternal topics in the 21st century: energy and environmental crisis; this affects the global ecology, economy, and human survival. Since the last century, traditional fossil energy has supported the development of the human economy and industrial industry. Now the depletion and depletion of fossil fuels will inevitably lead to irreversible environmental damage; the long-term vicious circle directly threatens the harmonious coexistence of the earth and human beings . Under the double crisis of energy consumption and environmental pollution, fuel cell, as an emerging green technology, has gained widespread attention in the scientific community like a spark, and has become a substitute for future power energy. [0003] Under acidic conditions, the high active potential of the cathode leads to a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/96H01M8/18
CPCY02E60/50
Inventor 王建国袁博文钟兴
Owner ZHEJIANG UNIV OF TECH
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