Nitrogen-doped porous carbon material supporting CoB nanoparticles, preparation method and application thereof

A nitrogen-doped porous carbon and porous carbon material technology, applied in the field of catalytic chemistry, can solve problems such as unsatisfactory application requirements and reduced catalytic effect, and achieve excellent catalytic performance, facilitate recycling, and save costs

Active Publication Date: 2019-08-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The existing technology uses cobalt instead of ruthenium, which significantly reduces the cost of raw materials, but the catalytic effect also drops significantly, which cannot meet the application requirements

Method used

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  • Nitrogen-doped porous carbon material supporting CoB nanoparticles, preparation method and application thereof
  • Nitrogen-doped porous carbon material supporting CoB nanoparticles, preparation method and application thereof
  • Nitrogen-doped porous carbon material supporting CoB nanoparticles, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the nitrogen-doped porous carbon material loaded with CoB nanoparticles, the specific operation steps are as follows:

[0043] Step 1) Preparation of nitrogen-doped porous carbon material, mix the carbon precursor with KOH and urea at a mass ratio of 1.0:3.0:1.0, soak in 30ml deionized water, stir magnetically for 2 hours, dry and put it into the tube Calcined in a furnace under the protection of nitrogen, the calcination activation temperature was 700°C, and the calcination activation time was 2 h to obtain a nitrogen-doped porous activated carbon material; the above product was soaked in 1M HCl solution, washed with deionized water, and suction filtered to neutral, dried and then ground to obtain a nitrogen-doped porous carbon material;

[0044] Step 2) Loading of CoB nanoparticles, weighing 40wt% CoCl 2 .6H 2 0, put into 10ml deionized water, take a certain quality of nitrogen-doped porous carbon, ultrasonic treatment for 1h, take by weigh...

Embodiment 2

[0055] The preparation method of the nitrogen-doped porous carbon material loaded with CoB nanoparticles, the specific operation steps not specified are the same as the above-mentioned Example 1, the difference is: the step 3) CoCl 2 .6H 2 The O loading was 20 wt%.

[0056] The characterization test methods are the same as those in Example 1 above.

[0057] The nitrogen-doped porous carbon material loaded with CoB nanoparticles in Example 2 was subjected to a low-temperature nitrogen isothermal adsorption performance test, and the specific surface area of ​​the nitrogen-doped porous carbon material loaded with CoB nanoparticles was 2524 m 2 g -1 .

[0058] The nitrogen-doped porous carbon material loaded with CoB nanoparticles in Example 2 was subjected to a low-temperature nitrogen isothermal adsorption performance test, and the pore size distribution of the nitrogen-doped porous carbon material loaded with CoB nanoparticles was about 2 nm.

[0059] The nitrogen-doped po...

Embodiment 3

[0062] The preparation method of the nitrogen-doped porous carbon material loaded with CoB nanoparticles, the specific operation steps not specified are the same as the above-mentioned Example 1, the difference is: the step 3) CoCl 2 .6H 2 The O loading was 30 wt%.

[0063] The characterization test methods are the same as those in Example 1 above.

[0064] The nitrogen-doped porous carbon material loaded with CoB nanoparticles in Example 3 was subjected to a low-temperature nitrogen isothermal adsorption performance test, and the specific surface area of ​​the nitrogen-doped porous carbon material loaded with CoB nanoparticles was 2524 m 2 g -1 .

[0065] The nitrogen-doped porous carbon material loaded with CoB nanoparticles in Example 3 was subjected to a low-temperature nitrogen isothermal adsorption performance test, and the pore size distribution of the nitrogen-doped porous carbon material loaded with CoB nanoparticles was about 2 nm.

[0066] The nitrogen-doped po...

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Abstract

The invention discloses a nitrogen-doped porous carbon material loaded with CoB nanoparticles. A nitrogen-containing compound is added to a porous carbon material, and the irregular spherical nitrogen-doped porous carbon material is produced by a hydrothermal method, an activation method and a high-temperature heat treatment method; and then CoB is supported on the nitrogen-doped porous carbon material by an in-situ reduction method to obtain the nitrogen-doped porous carbon material loaded with CoB nanoparticles. CoB nanoparticles are uniformly supported on the surface and in pores of the irregular spherical nitrogen-doped porous carbon material, the final product is in a regular spherical shape finally, the specific surface area of the final product is 1359-2524 m<2> / g, and the pore sizedistribution of the final product is 1.60-2.40 nm. The preparation method comprises the following steps: 1) preparing a nitrogen-doped porous carbon material; and 2) supporting the CoB nanoparticles.The material serves as a sodium borohydride hydrolytic hydrogen-releasing catalyst, the hydrogen desorption rate reaches 1200-2500 ml / min*g, the cycle performance is good, and the hydrogen-releasingquantity is maintained at 50-60%. The material is simple to prepare, has more excellent catalytic performance, and has a wide application prospect in the fields of application of hydrogen energy, fuelcells and the like.

Description

technical field [0001] The invention relates to the technical field of catalytic chemistry, in particular to a nitrogen-doped porous carbon material loaded with CoB nanoparticles and a preparation method and application thereof. Background technique [0002] Energy is the most important material for human survival and the most important resource for human development. With the rapid development of modern industry, the consumption of energy is increasing, and at the same time, the problems of environmental pollution and energy depletion are becoming more and more serious. Hydrogen energy, as an efficient and clean secondary energy source, has attracted widespread attention in recent years. NaBH as a hydrogen storage material 4 Has a high hydrogen storage density (10.6 wt.%), and, in NaBH 4 In the reaction of hydrolysis of hydrogen, half of the released hydrogen comes from water, that is to say, every time there is 1 g of NaBH 4 During hydrolysis, a maximum of 0.212 g of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01J35/10B01J37/08B01J37/06C01B3/06
CPCB01J27/24B01J37/10B01J37/082B01J37/06C01B3/065B01J35/33B01J35/618B01J35/638B01J35/643B01J35/647Y02E60/36
Inventor 孙立贤李晶华徐芬程日光朱宇陆磊磊赵莉岑文龙黄智煜
Owner GUILIN UNIV OF ELECTRONIC TECH
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