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Preparation method of ammonia borane-metal catalyst composite hydrogen storage material

A technology for metal catalysts and hydrogen storage materials, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as troublesome operation and difficult control, achieve fast synthesis speed, inhibit release, and avoid metal ions The effect of the restoration process

Inactive Publication Date: 2015-01-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of this catalyst is cumbersome to operate, and it is only suitable for certain metal elements that have relatively stable ionic forms in solution.
In addition, the amount of metal ions in the solution that are reduced to zero-valent metal atoms is not easy to control.

Method used

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  • Preparation method of ammonia borane-metal catalyst composite hydrogen storage material
  • Preparation method of ammonia borane-metal catalyst composite hydrogen storage material
  • Preparation method of ammonia borane-metal catalyst composite hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, prepare the composite hydrogen storage material of ammonia borane and metal catalyst

[0019] (1) The metal catalyst based on MCM-48 was synthesized by magnetron sputtering method. In this embodiment, MCM-48 is selected as the base. Before sputtering, dry the MCM-48 in a drying oven at 120°C for 2 hours to remove moisture in the material. Then put the 0.0800g MCM-48 substrate into the chamber of the magnetron sputtering apparatus and evacuate to 2×10 -4 Pa. Sputtering was performed under an argon atmosphere, the flow rate of argon gas was 76 sccm, and the working pressure was 0.7 Pa. The rotation rate of the substrate was 15 revolutions per minute. MCM-48-Pd, MCM-48-Ni and MCM-48-Pt catalysts were obtained by sputtering with Pd, Ni and Pt targets respectively for 2 minutes.

[0020] (2) Mix the catalyst obtained by sputtering with ammonia borane in a specific mass ratio (setting 1:2, 1:4 and 1:8), and then add 5 ml of water to remove the water with me...

Embodiment 2

[0023] Example 2. Research on the catalytic performance of the catalyst in the composite hydrogen storage material for the thermal decomposition of ammonia borane to decompose hydrogen

[0024] (1) Put the composite hydrogen storage material sample uniformly mixed with the catalyst prepared in Example 1 and ammonia borane in a temperature-programmed desorption-mass spectrometer.

[0025] (2) Under measuring argon atmosphere, MCM-48-Pd, MCM-48-Ni and MCM-48-Pt catalyst are mixed with ammonia borane respectively by mass ratio as 1: 2 samples (respectively denoted as Pd-AB- 1. The hydrogen release temperature of Ni-AB-1 and Pt-AB-1), and the purity of the released hydrogen. Depend on image 3 It can be seen that, compared with pure ammonia borane (pristine AB), the samples after adding the catalyst all released hydrogen at a lower temperature. Among them, the catalytic performance of the sample (Pd-AB-1) composited with MCM-48-Pd and ammonia borane is particularly remarkable, w...

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Abstract

The invention discloses a preparation method of an ammonia borane-metal catalyst composite hydrogen storage material. The preparation method comprises that through magnetron sputtering, metal atoms having catalytic effects are uniformly deposited on a mesoporous material base so that catalyst powder is obtained; the catalyst powder and ammonia borane are mixed uniformly in an anhydrous organic solvent; and the organic solvent is volatilized so that the ammonia borane-metal catalyst composite hydrogen storage material is obtained. The catalyst in the ammonia borane-metal catalyst composite hydrogen storage material has good catalytic effects on a thermolysis hydrogen desorption reaction of ammonia borane so that a hydrogen desorption temperature of ammonia borane is reduced and foreign gas escape can be inhibited effectively and hydrogen desorption dynamic features can be improved. The preparation method adopts simple equipment, and has a fast synthesis speed and a low cost. The ammonia borane-metal catalyst composite hydrogen storage material obtained by the preparation method has good product dispersibility, a wide metal selection range and obvious catalysis performances, can be massively produced easily and has a good application prospect.

Description

technical field [0001] The invention relates to the field of preparation of powder material catalysts and the field of chemical hydrogen storage of solid materials, in particular to the catalytic research on the thermal decomposition and desorption of ammonia borane compounds. Background technique [0002] With the increasing depletion of fossil energy, it has become a top priority for society to find other efficient and environmentally friendly alternative energy sources. Due to the advantages of abundant storage capacity and environmental friendliness, hydrogen has a good application prospect. So far, the key factor hindering the development of "hydrogen economy" is the storage of hydrogen, so the selection of suitable hydrogen storage materials has become the focus of research. Ammoniaborane (NH 3 BH 3 ) has attracted the attention of scientists from all over the world in recent years due to its large hydrogen storage capacity (19.6wt%) and has been extensively studied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/04B01J37/34B01J29/03
CPCY02E60/364Y02E60/36
Inventor 辛恭标杨鋆智李伟郑捷李星国
Owner PEKING UNIV
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