Nitrogen-doped carbon-inlaid non-noble metal catalyst and preparation method and application thereof

A non-precious metal and catalyst technology, applied in the field of nitrogen-doped carbon inlaid non-precious metal catalyst and its preparation, can solve the problems of precursor framework collapse, low specific surface area and pore volume, and complex crystals, and achieve the effect of low price

Active Publication Date: 2018-10-26
山西佳翔瑞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, in the preparation of nitrogen-doped porous carbon mosaic non-noble metal catalysts, there are still problems of precursor skeleton collapse during high temperature pyrolysis, low specific surface area and pore volume, and relatively complex crystal phase.

Method used

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  • Nitrogen-doped carbon-inlaid non-noble metal catalyst and preparation method and application thereof
  • Nitrogen-doped carbon-inlaid non-noble metal catalyst and preparation method and application thereof
  • Nitrogen-doped carbon-inlaid non-noble metal catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 0.5g of cobalt phthalocyanine and 5.0g of commercial silica nanoparticles and add them to the ethanol-chloroform mixed solvent, stir and mix in a water bath, and then spin evaporate to remove the solvent. The obtained solid powder is placed in a high-temperature quartz boat, and then Put it into the middle area of ​​the tube furnace, raise the temperature to 700°C at a rate of 3°C / min in an atmosphere with a nitrogen flow rate of 50 mL / min and keep it constant for 4 hours, then cool to room temperature and take it out. The obtained black powder was added into 1.0 mol / L sodium hydroxide solution, stirred at room temperature for 12 hours, filtered and washed with water and dried to obtain a nitrogen-doped carbon-embedded non-precious metal catalyst.

[0037] attached figure 1 The transmission electron microscope image shows that metal Co nanoparticles with a size of about 12-18nm are embedded in the porous nitrogen-doped carbon catalytic material structure, which is...

Embodiment 2

[0041] Weigh 1.0g of phenanthroline cobalt and 5.0g of commercial silica nanoparticles and add them to ethanol-chloroform mixed solvent, stir and mix in a water bath, and then spin evaporate to remove the solvent. The obtained solid powder is put into a high-temperature quartz boat, and then It was placed in the middle area of ​​the tube furnace, raised to 800°C at a rate of 3°C / min in an atmosphere of nitrogen flow rate of 100mL / min and kept constant for 4 hours, then cooled to room temperature and taken out. The obtained black powder was added into 1.0 mol / L sodium hydroxide solution, stirred at room temperature for 12 hours, filtered and washed with water and dried to obtain a nitrogen-doped carbon-embedded non-precious metal catalyst.

Embodiment 3

[0043] Weigh 1.0g of cobalt phthalocyanine and 2.5g of commercial silica nanoparticles and add them to the ethanol-chloroform mixed solvent, stir and mix in a water bath, and then spin evaporate to remove the solvent. The obtained solid powder is placed in a high-temperature quartz boat, and then Put it into the middle area of ​​the tube furnace, raise the temperature to 900°C at a rate of 5°C / min in an atmosphere of nitrogen flow rate of 100 mL / min, keep it constant for 4 hours, cool to room temperature and take it out. The obtained black powder was added into 0.5 mol / L sodium hydroxide solution, stirred at room temperature for 12 hours, filtered, washed and dried, and a nitrogen-doped carbon embedded non-precious metal catalyst was obtained.

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Abstract

The invention discloses a nitrogen-doped carbon-inlaid non-noble metal catalyst and a preparation method and application thereof. A non-noble metal organic complex and a compound of silicon dioxide are taken as precursors, and the catalyst for efficient decomposition of ammonia-borane into hydrogen by the aid of high temperature thermal decomposition and in combination with a selective etching strategy. The preparation method includes: dispersing the non-noble metal organic complex and commercial silica nanoparticles in an ethanol-chloroform two-phase solvent system and removing the solvent byspin evaporation to obtain composite nanopowder; putting the composite nanopowder in a tube furnace, raising the temperature to 700-1000DEG C under the protection of insert gas and keeping the constant temperature for 1-6 hours; repeatedly treating obtained black solid in a dilute alkali solution for 12-24 hours at the temperature of 50DEG C, and performing bleaching, washing and drying to obtainthe target catalyst. The catalyst shows excellent catalytic properties, resistance to poisioning/inactivation and cycling stability in the catalytic hydrolysis of ammonia-borane to produce hydrogen;the method has the advantages that the raw materials are easy to obtain, preparation period is short, and batch production can be realized.

Description

technical field [0001] The invention relates to a nitrogen-doped carbon mosaic non-noble metal catalyst and its preparation method and application, belonging to the technical field of catalyst preparation. Background technique [0002] With the rapid consumption of fossil resources and the worsening of environmental pollution, scientists have to develop clean, efficient and easy-to-storage alternative energy sources to fundamentally eliminate the emission of greenhouse gases and pollutants. In the current alternative energy system, hydrogen plays an extremely important role in the fields of food, medicine, fuel cells, and aviation industry due to its advantages such as abundant sources, high energy density, and no pollution. However, the efficient storage and transportation of hydrogen is still a challenge. A huge challenge. According to the regulations of the U.S. Department of Energy, the minimum mass and volume capacity of the hydrogen storage materials carried in the on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/06
CPCB01J27/24C01B3/06C01B2203/0277C01B2203/1047C01B2203/1052Y02E60/36
Inventor 张锋伟马春兰张献明
Owner 山西佳翔瑞科技有限公司
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