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Two-step method for preparing hydrogen-storage material from MgH2 (magnesium hydride) nano-confined by nickel-doped carbon mesoporous framework

A framework material and nano-confined technology, applied in the field of clean energy materials, can solve problems such as slow hydrogen absorption and desorption rate, achieve improved hydrogen absorption and desorption kinetics and hydrogen release thermodynamics, easy control of reaction conditions, and low hydrogen release temperature. Effect

Inactive Publication Date: 2016-06-08
SHANGHAI UNIV
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Problems solved by technology

However, since magnesium hydride (MgH 2 ) The kinetic hydrogen absorption and desorption rate is slow, and the hydrogen desorption temperature is close to 573K at 1 atmospheric pressure (ΔH=75kJmol -1 h 2 ), so there is still a long way to go to meet the practical application requirements of vehicle-mounted hydrogen sources

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  • Two-step method for preparing hydrogen-storage material from MgH2 (magnesium hydride) nano-confined by nickel-doped carbon mesoporous framework
  • Two-step method for preparing hydrogen-storage material from MgH2 (magnesium hydride) nano-confined by nickel-doped carbon mesoporous framework
  • Two-step method for preparing hydrogen-storage material from MgH2 (magnesium hydride) nano-confined by nickel-doped carbon mesoporous framework

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Embodiment Construction

[0020] Preferred embodiments of the present invention are described in detail as follows:

[0021] The preparation method of magnesium hydride hydrogen storage material with nickel doping and carbon mesoporous framework nano-confinement in this embodiment is characterized in that the carbon mesoporous framework material doped with nickel element is used to confine MgH 2 , to reduce the particle size to the nanometer level.

[0022] In this embodiment, the method for preparing the above-mentioned nano-confined magnesium hydride hydrogen storage material includes the following steps:

[0023] (1) 1.25g of sucrose dissolved in 5ml containing 0.14gH 2 SO 4 and 0.3259g of nickel nitrate in deionized water, then add 1g of SBA-15, dissolve and stir for 6h, and initially carbonize at 373K and 433K for 12h. Repeat the dissolution process, dissolve the carbonized dark brown powder in 5ml solution containing 0.2086g nickel nitrate and 0.8g sucrose, carbonize at 433K for 12h, then carb...

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Abstract

The invention discloses a two-step method for preparing hydrogen-storage material from MgH2 (magnesium hydride) nano-confined by nickel-doped carbon mesoporous framework and belongs to the technical field of new-energy materials. The method is characterized in that the hydrogen-storage material is formed by supporting MgH2 in nano pore channels of a mesoporous framework material doped with nickel elements. The nickel elements and the carbon mesoporous framework material are synthesized with a one-step method, MgBu2 and the mesoporous framework material doped with the nickel elements are impregnated, MgBu2 is changed into MgH2 supported in the nano pore channels of the carbon mesoporous framework material doped with the nickel elements in a high-pressure reaction kettle at a certain temperature under certain pressure, MgH2 supported outside the pore channels is washed away with pentane and dried, and the hydrogen-storage material is prepared. Nano-confined MgH2 synthesized with the method can release a large amount of hydrogen at the room temperature and is good in hydrogen adsorption and desorption dynamics performance and hydrogen desorption thermo-dynamics performance. The method is simple to operate and has ideal application prospect, the synthesis speed is high, and the dispersity is good.

Description

technical field [0001] The invention confines a magnesium hydride hydrogen storage material in a nanopore through a mesoporous framework material doped with nickel element, and belongs to the technical field of clean energy materials. Background technique [0002] In today's world, in order to solve energy shortage, environmental pollution and sustainable economic development, people are trying their best to find alternative clean energy and renewable energy. In recent years, "smog" has become the pollution that people hate the most. It can be seen that the search for new clean energy is of great significance to the sustainable development of the whole world and our country. The product of hydrogen energy combustion is water, which is an ideal low-pollution or zero-pollution clean energy with high energy density (142MJkg -1 ), although the development of hydrogen fuel vehicles is full of difficulties, as a long-term goal, it will eventually be one of the most important ways...

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Application Information

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IPC IPC(8): C01B6/04
CPCC01B6/04
Inventor 吴成章王宇龙何大亮李谦丁伟中
Owner SHANGHAI UNIV
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