Porous carbon loaded nano metal oxide catalyst, preparation method of catalyst, and hydrogen storage material

A technology of nano-metals and hydrogen storage materials, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst carriers, etc., can solve the problems that the performance of the hydrogen storage system cannot meet the practical requirements, and achieve Mild conditions, uniform distribution, high activity effect

Active Publication Date: 2014-10-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to Ti-containing catalysts, it has been found that Zr-, Ce-, Nb-, V- and carbon-based catalysts are effective for NaAlH 4 The de / hydrogenation kinetics performance of NaAlH also has a certain improvement effect, but the existing NaAlH 4 The performance of the hydrogen storage system still cannot meet the needs of practical application

Method used

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  • Porous carbon loaded nano metal oxide catalyst, preparation method of catalyst, and hydrogen storage material
  • Porous carbon loaded nano metal oxide catalyst, preparation method of catalyst, and hydrogen storage material
  • Porous carbon loaded nano metal oxide catalyst, preparation method of catalyst, and hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Nano-TiO 2 Preparation of porous carbon composite catalyst:

[0048] (1) Magnetically stir anhydrous ethanol (60ml) and anhydrous furfuryl alcohol (30ml) in the flask for 20min in the dark, weigh the heated and activated MIL-125(Ti) (0.5g) into the flask, seal it and avoid Light and magnetic stirring for 24h.

[0049] (2) Filtrate to obtain solid powder, put it into a quartz crucible and heat it up to 80°C at a heating rate of 10°C / min under the protection of an inert atmosphere for 24 hours to promote dehydration and condensation between furfuryl alcohol molecules; then raise the temperature at a heating rate of 5°C / min to 150°C, in a dynamic vacuum (1×10 -3 Under Torr) condition, keep warm for 6h.

[0050] (3) Take out the heated solid powder obtained in step (2), repeat steps (1) to (2) once, and then put the product into a quartz tube furnace under the protection of Ar gas flow (100ml / min), at 5°C The heating rate was raised to 900 °C for 3 h at a heating rate o...

Embodiment 2

[0053] Nano-TiO 2 C-900 Catalytic NaAlH 4 Preparation of hydrogen storage material: with the nano-TiO of embodiment 1 2 C-900 as catalyst, NaAlH 4 The matrix material is mixed uniformly in argon atmosphere glove box according to a certain proportion, among which TiO 2 The mass fractions of C-900 in the mixture are: 3wt%, 5wt%, 7wt%, 9wt%, 10wt%. Put each mixture in a stainless steel ball mill tank, and perform ball milling on a high-energy ball mill. The ball milling atmosphere is an argon atmosphere, the rotation speed is 500 rpm, the ball-to-material ratio is 120:1, and the ball milling time is 24 hours, corresponding to five parts of hydrogen storage. Materials, respectively numbered as:

[0054] NaAlH 4 +3wt%TiO 2 C-900,

[0055] NaAlH 4 +5wt%TiO 2 C-900,

[0056] NaAlH 4 +7wt%TiO 2 C-900,

[0057] NaAlH 4 +9wt%TiO 2 C-900,

[0058] NaAlH 4 +10wt%TiO 2 C-900.

[0059] The hydrogen desorption kinetics of five parts of hydrogen storage materials was tested...

Embodiment 3

[0066] Nano-TiO 2 The preparation process of the porous carbon composite catalyst is the same as in Example 1.

[0067] Nano-TiO 2 C-900 Catalytic NaAlH 4 Preparation of hydrogen storage material: with the nano-TiO of embodiment 1 2 C-900 as catalyst, NaAlH 4 The matrix material is mixed uniformly in argon atmosphere glove box according to a certain proportion, among which TiO 2 The mass fraction of C-900 in the mixture is: 9wt%. Put the mixture in a stainless steel ball mill tank, and perform ball milling on a high-energy ball mill. The ball milling atmosphere is an argon atmosphere, the rotation speed is 500 rpm, the ball-to-material ratio is 120:1, and the ball milling time is 24 hours. The corresponding hydrogen storage material is named: NaAlH 4 +9wt%TiO 2 C-900.

[0068] The hydrogen absorption and desorption cycle performance of the above hydrogen storage materials was tested by volume method. The dehydrogenation process is: under vacuum conditions (initial vac...

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Abstract

The invention discloses a porous carbon loaded nano metal oxide catalyst, a preparation method of catalyst, and a hydrogen storage material applying the catalyst. The preparation method comprises the following steps: (1) immersing an organic metal framework into a mixed solution of furfuryl alcohol and alcohol, and stirring for 12-60 hours under a sealed condition; (2) filtering a product obtained from the step (1) to obtain solid powder, and rising the temperature to 140-165 DEG C under inert atmosphere protection; (3) rising the temperature of the product obtained from the step (1) to 700-1000 DEG C under inert gas flow protection; and keeping the temperature and cooling so as to obtain the porous carbon loaded nano metal oxide catalyst. The preparation method of the catalyst provided by the invention is simple and convenient; the hydrogen storage material in which the catalyst is added has the advantages of low hydrogen discharge temperature, high hydrogen discharge velocity, good hydrogen absorption and discharge reversibility and long circulation service life.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a porous carbon-supported nanometer metal oxide catalyst, a preparation method thereof, and an application in hydrogen storage materials. Background technique [0002] Energy is one of the key elements for human survival and development, and an important material basis for national economic and social development. With the overexploitation and utilization of such fossil fuels, human beings are facing a severe double crisis of energy depletion and environmental degradation. Therefore, it is of great significance to develop green new energy with wider sources, clean and efficient. Among them, hydrogen energy, as a new type of clean secondary energy, has attracted people's attention because of its many advantages in physical and chemical properties, and the development of hydrogen energy technology will also bring about major changes in the energy structure. From the prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/10B01J32/00B01J35/10C01B3/04C01B3/06
CPCY02E60/36
Inventor 刘永锋张欣高明霞潘洪革
Owner ZHEJIANG UNIV
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