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Preparation of N, S codoped graphitized carbon material and application as electrochemical catalyst

A technology of graphitized carbon and co-doping, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. The effect of catalytic performance

Inactive Publication Date: 2017-07-18
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently reported carbon-based catalytic materials for HER are based on graphene, carbon nanotubes and C 3 N 4 etc., the preparation process of these materials is complicated and the yield is low

Method used

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  • Preparation of N, S codoped graphitized carbon material and application as electrochemical catalyst
  • Preparation of N, S codoped graphitized carbon material and application as electrochemical catalyst
  • Preparation of N, S codoped graphitized carbon material and application as electrochemical catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of CMVImBr monomer: Add 1-vinylimidazole (9.411 g) and bromoacetonitrile (11.995 g, molar ratio 1:1) into a 50 ml round-bottomed flask and stir at room temperature for 4-5 hours to form Yellow solid; dissolve the solid in methanol, settle the solution in anhydrous ether, and finally filter to obtain a white solid, which is oven-dried at 30°C, which is CMVImBr monomer;

[0034] (2) Preparation of polyionic liquid PCMVImBr: Add CMVImBr monomer (10 g) and AIBN (0.2 g) initiator together into a 250 ml round bottom flask, then add 100 ml dimethyl sulfoxide as solvent, dissolve Finally, the reaction vessel was placed in an ice bath, and the whole reaction system was evacuated and nitrogen gas was applied, and this was repeated 3 times. After the solution in the round bottom flask reached room temperature, it was placed in an oil bath at 75° C. for 72 hours. After the polymerization is completed, the above solution is settled in tetrahydrofuran, and after cent...

Embodiment 2

[0040] (1) Preparation of CMVImBr monomer: same as Example 1;

[0041] (2) Preparation of polyionic liquid PCMVImBr: same as Example 1;

[0042] (3) Polymer 1-cyanomethyl-3-vinylimidazole bis(trifluoromethanesulfonyl)imide (PCMVImTf 2 N) preparation: same as Example 1;

[0043] (4) BSA@PCMVImTf 2 Preparation of N composite membrane: (4) BSA@PCMVImTf 2 Preparation of N composite membrane: PCMVImTf 2 N (0.1624 g) and BSA (0.1624 g, mass ratio 1:1) were dissolved in DMF (7 mL) to obtain a transparent homogeneous solution. Apply the solution on a glass slide and dry it in an oven at 75°C for 3 h, then soak the glass slide in 0.5 wt% ammonia ethanol solution for 2 hours to obtain BSA@PCMVImTf 2 N porous precursor film material;

[0044] (5) BSA@PCMVImTf 2 Preparation of N porous carbon: put the porous precursor film prepared above into a tube furnace and raise the temperature to 1000°C at a rate of 10°C / min, and keep it for 1 hour, and then naturally cool down to room temper...

Embodiment 3

[0046] (1) Preparation of CMVImBr monomer: same as Example 1;

[0047] (2) Preparation of polyionic liquid PCMVImBr: same as Example 1;

[0048] (3) Polymer 1-cyanomethyl-3-vinylimidazole bis(trifluoromethanesulfonyl)imide (PCMVImTf 2 N) preparation: same as Example 1;

[0049] (4) BSA@PCMVImTf 2 Preparation of N composite membrane: PCMVImTf 2 N (1.7864 g) and BSA (0.1624 g, mass ratio 11:1) were dissolved in DMF (7 mL) to obtain a transparent homogeneous solution. Apply the solution on a glass slide and dry it in an oven at 75°C for 3 h, then soak the glass slide in 0.5 wt% ammonia ethanol solution for 2 hours to obtain BSA@PCMVImTf 2 N porous precursor film material;

[0050] (5) BSA@PCMVImTf 2 Preparation of N porous carbon: put the porous precursor film prepared above into a tube furnace and raise the temperature to 1000°C at a rate of 10°C / min, and keep it for 1 hour, and then naturally cool down to room temperature to obtain BSA@PCMVImTf 2 N porous carbon material...

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Abstract

The invention provides a preparation method of an N, S codoped graphitized carbon material. The preparation method comprises the following steps of: dissolving bovine serum albumin (BSA) and polyion liquid in N, N-dimethyl formamide to obtain transparent and uniform solution; coating a glass sheet with the solution, drying, treating with ammonia water for deprotonation, thereby obtaining a precursor film material with pores and highly ion crosslinking, and after further carbonization for the film material, preparing the N, S codoped graphitized carbon material with excellent electrocatalytic activity. Shown from an electrochemical test, the carbon material shows excellent catalytic property in both HER and OER, and the overpotential is 165mV and 460mV respectively under the current density of 10mA / cm<2>, and is higher than that of the currently-reported nonmetal catalyst.

Description

Background technique [0001] Hydrogen is a clean, renewable energy carrier and thus an ideal alternative to fossil energy. Sustained hydrogen production from water splitting is an attractive solution but requires efficient, long-term stable electrocatalysts. As a benchmark electrocatalyst, platinum on carbon exhibits excellent catalytic activity in the hydrogen evolution reaction (HER), but its high cost and scarcity limit its wide application in practical industries. Therefore, people have developed a variety of non-noble metal catalysts, such as CoP / CNTs, Mo 2 C / MoB, MoS 2 / RGO, CoPS, CoOx, Ni 2 P and their alloys, etc., but these non-precious metal catalysts also have disadvantages such as limited use of the environment, low activity, and catalyst loss. [0002] Recent studies have found that heteroatom-doped graphitized carbon has good catalytic activity for HER and has excellent stability under acidic and alkaline conditions. Therefore, exploring the preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24C25B1/04C25B11/04Y02E60/36
Inventor 熊玉兵俞俊瑞宋红红樊玉霞王荣民
Owner NORTHWEST NORMAL UNIVERSITY
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