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Preparation method and application of nitrogen-doped porous carbon-loaded cobalt catalyst

A nitrogen-doped porous carbon and cobalt catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of reduced catalytic activity, easy cobalt agglomeration, unfavorable large-scale application, etc., to achieve cobalt The effect of increased load capacity, enhanced cycle stability, and simple method

Inactive Publication Date: 2016-04-20
NANKAI UNIV
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  • Description
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Problems solved by technology

Cobalt is easy to agglomerate during the preparation process. Graphene, silicon, silicon dioxide, etc. are often used to disperse metal cobalt nanoparticles, and the catalytic activity is significantly enhanced. However, after several cycles, the cobalt nanoparticles will still agglomerate, and the catalytic activity is greatly improved. reduce
At the same time, the loading of metal nanoparticles is relatively low, which is not conducive to large-scale application.

Method used

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  • Preparation method and application of nitrogen-doped porous carbon-loaded cobalt catalyst
  • Preparation method and application of nitrogen-doped porous carbon-loaded cobalt catalyst
  • Preparation method and application of nitrogen-doped porous carbon-loaded cobalt catalyst

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Embodiment

[0021] A preparation method of nitrogen-doped porous carbon-supported cobalt catalyst, the steps are as follows:

[0022] Three parts of 100mg N,N-disalicylaldehyde ethylenediamine cobalt(II) were added into respective crucibles, and then placed in a tube furnace, under the hydrogen-argon mixture gas atmosphere with the volume ratio of argon to hydrogen at 95:5 , heating and heating to 600°C, 700°C, and 800°C for calcination, the heating rate is 5° / min, and the calcination time is 1h; after the reaction is completed, cool to room temperature to prepare nitrogen-doped porous carbon-supported cobalt catalysts, which are named respectively It is CoN-C-600, CoN-C-700 and CoN-C-800 nanocomposite catalysts.

[0023] The XRD of CoN-C-600, CoN-C-700 and CoN-C-800 nanocomposite catalyst prepared by this embodiment are as follows: figure 1 As shown, where 2θ is equal to 26° is the diffraction peak of carbon, and the remaining three peaks are the diffraction peaks of simple cobalt. As ...

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Abstract

The invention discloses a preparation method of a nitrogen-doped porous carbon-loaded cobalt catalyst. The preparation method includes: adding N, N-bis(salicylidene) ethylene dimino cobalt (II) or bi(3-methoxysalicylaldehyde) ethylenediamine cobalt chloride into a crucible, placing into a tubular furnace, and heating to 400-900 DEG C for calcining for 1-10 h in a hydrogen-argon mixed atmosphere; cooling to room temperature to obtain the nitrogen-doped porous carbon-loaded cobalt catalyst which is used for hydrolytic dehydrogenation of ammonia borane. The preparation method has the advantages that the catalyst is prepared by adopting a one-step pyrolysis synthesis method, the preparation method is simple, cobalt loading quantity is greatly increased, and industrial production is facilitated; the catalyst is used for catalyzing hydrolytic dehydrogenation of ammonia borane, maximum dehydrogenation rate reaches 1383 mL H2min-1gCo-1, and activation energy is 31.0kJ / mol; especially, after cobalt nanoparticles are embedded in nitrogen-doped porous carbon, circulating stability is improved greatly.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a preparation method and application of a nitrogen-doped porous carbon-supported cobalt catalyst. Background technique [0002] With the depletion of fossil energy and the aggravation of environmental pollution, it has become an inevitable demand for the sustainable development of society to find a clean energy that can replace fossil energy. Hydrogen energy has the advantages of abundant reserves, renewable energy, and high combustion calorific value, and is considered to be a green energy with relatively promising application prospects. Safe and efficient hydrogen storage technology and materials are the key factors restricting the development of hydrogen economy. Among many hydrogen storage technologies and materials, ammonia borane has become one of the most promising hydrogen storage materials due to its high hydrogen storage capacity (19.6wt%) and stable existence...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C01B3/06
CPCC01B3/065B01J27/24B01J35/60Y02E60/36
Inventor 陶占良王海霞韩沫赵亚然陈军程方益李海霞
Owner NANKAI UNIV
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