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Bimetallic titanium niobium oxide, preparation method thereof and application of bimetallic titanium niobium oxide as catalyst of hydrogen storage material

A titanium-niobium oxide and hydrogen storage material technology, applied in the field of hydrogen storage materials, can solve the problems of low catalytic efficiency, loss of effective hydrogen storage capacity, etc., and achieve high catalytic efficiency, improved hydrogen absorption and desorption kinetic performance and cycle performance, The effect of large contact area

Pending Publication Date: 2022-07-26
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing catalysts are mainly transition metal simple substances or their compounds, and usually have relatively large particle sizes, or although they are nanomaterials, their catalytic efficiency is relatively low due to the easy agglomeration of nanometers, and the amount of catalyst added needs to be high. More than 5wt% (mass percentage), even more than 10wt%, to achieve a more obvious catalytic effect, resulting in the loss of effective hydrogen storage capacity

Method used

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  • Bimetallic titanium niobium oxide, preparation method thereof and application of bimetallic titanium niobium oxide as catalyst of hydrogen storage material
  • Bimetallic titanium niobium oxide, preparation method thereof and application of bimetallic titanium niobium oxide as catalyst of hydrogen storage material
  • Bimetallic titanium niobium oxide, preparation method thereof and application of bimetallic titanium niobium oxide as catalyst of hydrogen storage material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of lamellar titanium niobium oxide:

[0056] (1) 0.78 g of titanium n-butoxide and 1.30 g of niobium ethoxide were added to 1.33 g of concentrated hydrochloric acid with a concentration of 38% under stirring to form mixed solution A.

[0057] (2) Add 0.36 g of surfactant polyoxyethylene-polypropylene ether block copolymer (F127) into 6.7 mL of absolute ethanol, and stir until F127 is completely dissolved in absolute ethanol to form mixed solution B.

[0058] (3) Add the above mixed solution B into the above mixed solution A, and continue to stir to form a mixed solution C. Then 35.6mL of ethylene glycol was added to 4.4mL of mixed solution C under stirring, the mixed solution was transferred to an 80mL reaction kettle, heated to 150°C in an oven and kept for 20 hours, and cooled to room temperature with the furnace, solid-liquid A precipitate was isolated.

[0059] (4) The obtained precipitate was centrifugally washed with absolute ethanol to remove surfac...

Embodiment 2

[0079] The preparation of lamellar titanium niobium oxide is the same as that in Example 1.

[0080] Using the layered titanium niobium oxide as catalyst, added to MgH 2 In the hydrogen storage material, the addition amount is 1 wt %, and the ball milling is mixed, and the ball milling process is the same as that of Example 1.

[0081] Using the volume method at an initial vacuum of 10 –3 Under the condition of Torr, the kinetic performance of hydrogen release with temperature was tested, and the obtained hydrogen release curve with temperature was as follows: Figure 8 As shown, the initial hydrogen release temperature and the end temperature of hydrogen release are 206 °C and 310 °C, respectively, and the amount of hydrogen released when heated to 300 °C is as high as 7.2 wt%.

Embodiment 3

[0083] The preparation of lamellar titanium niobium oxide is the same as that in Example 1.

[0084] Using the layered titanium niobium oxide as catalyst, added to MgH 2 In the hydrogen storage material, the addition amount is 5 wt %. Mixing by ball milling, the ball milling process is the same as that in Example 1.

[0085] Using the volume method at an initial vacuum of 10 –3 The kinetic properties of hydrogen release with temperature of the test material were tested, and the obtained hydrogen release curve with temperature was as follows: Figure 9 As shown, the initial hydrogen release temperature and the end temperature of hydrogen release are 175°C and 295°C, respectively, and the amount of hydrogen released when heated to 300°C is as high as 6.8 wt%.

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Abstract

The invention discloses a bimetal titanium niobium oxide, a preparation method thereof and application of the bimetal titanium niobium oxide as a catalyst of a hydrogen storage material. The bimetal titanium niobium oxide comprises lamellar TiNb2O7 and lamellar and / or granular TiO2 and / or Nb2O5 which accounts for 0-20% of the total mass of the bimetal titanium niobium oxide. The bimetal titanium niobium oxide disclosed by the invention has the characteristics of high specific surface area and small thickness, and takes the two-dimensional lamellar bimetal titanium niobium oxide as a main phase. The bimetallic titanium niobium oxide is used for a catalyst of a composite hydrogen storage system containing MgH2 or LiBH4 or MgH2 or LiBH4 in any proportion, and under the condition of keeping high capacity of the system, the hydrogen absorption and desorption working temperature of the system can be reduced, and the dynamic performance and hydrogen absorption and desorption cycle performance of the system are improved.

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a bimetallic titanium niobium oxide, a preparation method thereof, and an application in the catalyst used as a hydrogen storage material. Background technique [0002] Energy is the backbone of the national economy. In the global energy consumption structure, traditional fossil energy accounts for a large proportion. With the large-scale development and utilization of human beings, traditional fossil energy, as a non-renewable energy source, is facing serious depletion. The massive burning of fossil energy has also brought serious environmental pollution problems such as acid rain, smog and greenhouse effect to human beings, threatening the survival and development of human beings. Therefore, the development of clean and efficient green energy is of great significance. [0003] Hydrogen has become an ideal energy carrier due to its abundant reserves, high energy dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01J35/02B01J35/10C01B3/00B01J35/00
CPCB01J23/20C01B3/001B01J35/40B01J35/615
Inventor 高明霞鲜开诚孙大林潘洪革刘永锋孙文平
Owner ZHEJIANG UNIV
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