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Amorphous carbon-loaded nano metal particle catalyst and preparation method and application thereof

A technology of nano-metal particles and amorphous carbon, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of hydrogen storage capacity loss and achieve distribution Uniform, conducive to capacity, hydrogen desorption kinetics performance and cycle performance improvement effect

Active Publication Date: 2018-12-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing catalysts are mainly catalysts based on transition metal oxides and halides, which are easily combined with NaAlH during heating. 4 The reaction produces by-products NaCl and NaOH, etc., resulting in the loss of hydrogen storage capacity

Method used

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  • Amorphous carbon-loaded nano metal particle catalyst and preparation method and application thereof
  • Amorphous carbon-loaded nano metal particle catalyst and preparation method and application thereof
  • Amorphous carbon-loaded nano metal particle catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of nano-Ti@amorphous carbon composite catalyst:

[0058] (1) Titanocene dichloride (497.9 mg) and lithium hydride (31.8 mg) were put into a ball mill jar in an argon atmosphere glove box, mixed and ball milled at a speed of 300 rpm for 3 hours.

[0059] (2) Take out the uniformly mixed powder, put it into a quartz crucible, and raise the temperature to 550° C. for 2 hours under the protection of an inert atmosphere at a heating rate of 2° C. / min.

[0060] (3) Take out the heated solid powder in step (2) and put it into a 100ml flask and inject 50ml of ultra-dry pyridine, and magnetically stir for 2 hours to fully dissolve the by-product lithium chloride in the pyridine.

[0061] (4) The mixture in step (3) is filtered under reduced pressure in an inert atmosphere glove box, and the obtained solid powder is heated to 150°C for 5 hours under dynamic vacuum to remove residual pyridine, and it can be obtained after cooling Amorphous Carbon-Supported Nano-Metal ...

Embodiment 2

[0064] Nano-Ti@C Catalyzed NaAlH 4 Preparation of hydrogen storage materials: using the nano-Ti@C in Example 1 as a catalyst, NaAlH 4 The materials for hydrogen storage were mixed evenly in a certain proportion in an argon atmosphere glove box, and the mass fractions of Ti@C in the mixture were: 1wt%, 3wt%, 5wt%, 7wt% and 9wt%. Each mixture was placed in a stainless steel ball mill tank, and ball milled on a high-energy ball mill. The ball milling atmosphere was an argon atmosphere, the rotation speed was 500 rpm, the ball-to-material ratio was 120:1, and the ball milling time was 24 hours. Five copies of hydrogen storage materials, numbered respectively:

[0065] NaAlH 4 +1wt%Ti@C,

[0066] NaAlH 4 +3wt%Ti@C,

[0067] NaAlH 4 +5wt%Ti@C,

[0068] NaAlH 4 +7wt%Ti@C,

[0069] NaAlH 4 +9 wt% Ti@C.

[0070] The hydrogen desorption kinetics of five parts of hydrogen storage materials was tested by volumetric method. -3 Torr), heated to 250°C at a heating rate of 2°C / min...

Embodiment 3

[0081] The preparation process of the nano-Ti@C composite catalyst is the same as in Example 1.

[0082] Nano-Ti@C Catalyzed NaAlH 4 Preparation of hydrogen storage materials: using the nano-Ti@C in Example 1 as a catalyst, NaAlH 4 The matrix materials are mixed evenly in a certain proportion in an argon atmosphere glove box, and the mass fractions of Ti@C in the mixture are respectively: 7wt%. Each mixture was placed in a stainless steel ball mill tank, and ball milled on a high-energy ball mill. The ball milling atmosphere was an argon atmosphere, the rotating speed was 500 rpm, the ball-to-material ratio was 120:1, and the ball milling time was 24 hours. The hydrogen storage material is named: NaAlH 4 +7 wt% Ti@C.

[0083] The isothermal hydrogen desorption performance of the above hydrogen storage materials was tested by volumetric method. The dehydrogenation process is: under vacuum conditions (initial vacuum degree is 1×10 -3 Torr), heated to 140°C at a heating rate...

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Abstract

The invention discloses an amorphous carbon-loaded nano metal particle catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing metallocene dichloride and lithium hydride by ball milling under protection of an inert atmosphere to obtain a powdery mixture; heating the powdery mixture until the metallocene dichloride is completely reduced to a elemental metal and cyclopentadiene is dehydrocarburized to obtain a heated product; pulverizing the heated product to powder, and then added the powder to an organic solvent to obtain a mixture; separating a solid material from the mixture, and heating to remove the organic solvent to obtain the amorphous carbon-supported nano metal particle catalyst. The preparation method of the catalystis simple, and the NaAlH4 and MgH2 hydrogen storage materials with the added catalyst have the advantages of low hydrogen release temperature, fast hydrogen release rate and long cycle life.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to an amorphous carbon-supported nano-metal particle catalyst and its preparation method and application. Background technique [0002] Energy is the pillar of the national economy and the development of science and technology, and the development of human history is inseparable from the development and utilization of energy materials. At present, traditional fossil energy materials account for a large proportion of global energy use. However, traditional fossil energy materials are a kind of non-renewable energy. With the large-scale exploitation and use of human beings, human beings are facing severe energy depletion. In addition, the extensive application of fossil energy has brought serious environmental pollution problems to human beings. Nitrogen oxides, sulfides, and suspended particulates emitted from fossil energy combustion have brought acid rain, smog, and chok...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J35/02C01B3/00B01J35/00
CPCC01B3/0026C01B3/0084B01J23/52B01J35/393B01J35/00B01J35/30Y02E60/32
Inventor 刘永锋张欣潘洪革高明霞
Owner ZHEJIANG UNIV
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