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Precursor material and preparation method thereof, and nitrogen-doped carbon material and application thereof

A nitrogen-doped carbon, precursor technology, used in chemical instruments and methods, nanotechnology for materials and surface science, fuel cell-type half-cells and secondary battery-type half cells, etc., can solve the cumbersome method. , high cost and other problems, to achieve the effect of simple preparation process, low cost and low production cost

Active Publication Date: 2020-11-27
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the cumbersome and high-cost methods of defect-doped carbon materials in the prior art, the present invention proposes a low-cost, simple and controllable synthesis method to prepare defect-rich nitrogen-doped carbon nanomaterials. The synthesized defect-rich nitrogen-doped carbon nanomaterials have excellent catalytic ORR and OER performance, assembled into aqueous metal-air batteries, and its performance exceeds that of commercial noble metal platinum-carbon catalysts, showing its high potential for practical applications

Method used

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  • Precursor material and preparation method thereof, and nitrogen-doped carbon material and application thereof
  • Precursor material and preparation method thereof, and nitrogen-doped carbon material and application thereof
  • Precursor material and preparation method thereof, and nitrogen-doped carbon material and application thereof

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Embodiment 1

[0045] The preparation of embodiment 1 catalyst

[0046] Example 1

[0047] 0.4951g anhydrous zinc chloride (ZnCl 2 ) into 40mL formamide solution, ultrasonically dissolved, transferred to a hydrothermal reaction kettle, and heated at 180°C for 12h. The mixture in the reactor, at 10000r min -1Centrifuge in a centrifuge for 10 minutes, wash with deionized water 3 times, wash with ethanol 2 times, centrifuge, and place in an oven at 60°C for 12 hours to obtain a reddish-brown substance that is Zn-NC. The obtained above sample was calcined at a temperature of 700°C in a tube furnace for 2h, the heating rate was 5°C / min, and in 1mol L -1 Soak in hydrochloric acid for 24h, at 10000r min -1 Centrifuge in a centrifuge for 10 minutes, wash and dry the above samples to obtain Zn-NC-700, and finally roast Zn-NC-700 at a temperature of 950°C for 2 hours with a heating rate of 5°C / min to obtain defect-rich nitrogen-doped Heterocarbon material is NC-700-950.

[0048] Specific data st...

Embodiment 2

[0050] 40mL of formamide, 0.4951g of ZnCl 2 , 0.2g phenylphosphoric diamide (C 6 h 9 N 2 o 2 P) Add a 50mL reaction kettle, sonicate for a certain period of time until the solution is evenly dispersed, and conduct a hydrothermal reaction at 180°C for 12h. The material after hydroheating is at 10000r min -1 Centrifuge in a centrifuge for 10 min, wash with water three times, wash with alcohol twice, centrifuge and separate, and dry in a vacuum to obtain a black solid powder. Afterwards, the material was put into a tube furnace and calcined at 1000°C for 3 hours in a nitrogen atmosphere with a heating rate of 5°C / min. When the tube furnace was cooled to room temperature, the calcined sample was taken out to obtain the synthesized Zn-PNC-1000. The scanning electron micrograph of the synthesized Zn-PNC-1000 is as follows Figure 4 shown.

Embodiment 3

[0052] Add 1.081g of zinc nitrate into 40mL of formamide solution, ultrasonically dissolve, transfer to a hydrothermal reaction kettle, and heat at 180°C for 12h. The mixture in the reactor, at 10000r min -1 Centrifuge in a centrifuge for 10 minutes, wash with deionized water 3 times, wash with ethanol 2 times, centrifuge, and place in an oven at 60°C for 12 hours to obtain a reddish-brown substance that is Zn-NC. The obtained above sample was calcined at a temperature of 700°C in a tube furnace for 2h, the heating rate was 5°C / min, and in 1mol L -1 Soak in hydrochloric acid for 24h, at 10000r min -1 Centrifuge in a centrifuge for 10 minutes, wash and dry the above samples, and finally roast the samples at a temperature of 950°C for 2 hours with a heating rate of 5°C / min to obtain a defect-rich nitrogen-doped carbon material, which is NC-700-950 .

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Abstract

The invention discloses a preparation method of a precursor material for preparing a nitrogen-doped carbon material. The preparation method comprises the following steps of: (1) preparing a zinc chloride / formamide solution with certain concentration and uniform dissolution; (2) reacting the zinc chloride / formamide solution at the temperature of 160-220 DEG C; and (3) centrifuging and purifying thecompletely reacted solution, and drying to obtain the precursor material. The invention further provides a defect-rich nitrogen-doped carbon material prepared from the precursor material and application of the defect-rich nitrogen-doped carbon material. The process method for synthesizing the defect-rich carbon material is low in cost, simple in preparation process and suitable for large-scale production and application.

Description

Technical field: [0001] The present invention relates to the technical field of new material synthesis, in particular to the technical field of synthesis of special functional carbon materials and their electrochemical applications, especially to precursor materials and preparation methods for preparing defect-rich nitrogen-doped carbon materials, and by The nitrogen-doped carbon material prepared by it and its application. Background technique: [0002] Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key technologies for the development of various sustainable energy sources, such as metal-air batteries, renewable fuel cells, etc. However, ORR and OER require the use of electrocatalysts due to sluggish kinetics. Platinum (Pt) is currently the most effective ORR electrocatalyst, but it is expensive, easily poisoned and deactivated, which severely limits its application in industrial fields. Therefore, there is an urgent need to develop efficient elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/96H01M12/08C25B11/06C25B1/04
CPCB01J27/24H01M4/96H01M12/08B82Y30/00B82Y40/00C25B11/04C25B1/04B01J35/33B01J35/617B01J35/643B01J35/647Y02E60/36
Inventor 张国新常营娜马莽
Owner SHANDONG UNIV OF SCI & TECH
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