A kind of catalyst-containing carbon-coated mg-based hydrogen storage material and preparation method thereof

A technology for hydrogen storage materials and catalysts, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as low hydrogen storage capacity, improve hydrogen storage performance, simplify the process, and improve hydrogen storage kinetic performance. Effect

Active Publication Date: 2020-11-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the proportion of acetylene gas added was as high as 21.7%, the particle size was only reduced to 40nm, and the coated carbon layer was thicker, resulting in a low hydrogen storage capacity.
In addition, due to the lack of catalyst, the hydrogen storage kinetic performance of the sample needs to be further improved

Method used

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  • A kind of catalyst-containing carbon-coated mg-based hydrogen storage material and preparation method thereof
  • A kind of catalyst-containing carbon-coated mg-based hydrogen storage material and preparation method thereof
  • A kind of catalyst-containing carbon-coated mg-based hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Mg 98 V 2 Preparation of @C composite nanoparticles

[0037] (1) 15 grams of V metal ingots as catalysts are placed on the copper crucible of the plasma equipment reaction chamber, and 3 grams of Mg block is placed on the resistance heating table in the reaction chamber;

[0038] (2) close the reaction chamber, and evacuate the reaction chamber;

[0039] (3) Fill the reaction chamber with high-purity argon and high-purity hydrogen at a ratio of (hydrogen: argon = 1:3) until the total pressure of the chamber is 0.09MPa, and fill with 0.017vol% CH 4 gas;

[0040] (4) Turn on the power supply of the resistance heating table, control the surface temperature of the resistance heating table to be 550 ° C, and heat the Mg block through the resistance heating table; after the Mg starts to evaporate, start the plasma power supply, set the current to 60A, and heat the Mg block through the plasma arc. The metal V ingot as a catalyst is heated and evaporated. The V ...

Embodiment 2

[0044] Example 2: Mg 92 V 8 Preparation of @C composite nanoparticles

[0045] (1) 15 grams of V metal ingots as catalysts are placed on the copper crucible of the plasma equipment reaction chamber, and 1.5 grams of Mg block is placed on the resistance heating table in the reaction chamber;

[0046] (2) close the reaction chamber, and evacuate the reaction chamber;

[0047] (3) Fill the reaction chamber with high-purity argon and high-purity hydrogen at a ratio of (hydrogen: argon = 1:3) until the total pressure of the chamber is 0.09MPa, and fill with 0.017vol% CH 4 gas;

[0048] (4) Turn on the power supply of the resistance heating table, control the surface temperature of the resistance heating table to be 550 ° C, and heat the Mg block through the resistance heating table; after the Mg starts to evaporate, start the plasma power supply, set the current to 60A, and heat the Mg block through the plasma arc. The metal V ingot as a catalyst is heated and evaporated. The ...

Embodiment 3

[0052] Example 3: Mg 75 V 25 Preparation of @C composite nanoparticles

[0053] (1) 15 grams of V metal ingots as catalysts are placed on the copper crucible of the plasma equipment reaction chamber, and 0.3 gram of Mg blocks are placed on the resistance heating table in the reaction chamber;

[0054] (2) close the reaction chamber, and evacuate the reaction chamber;

[0055] (3) Fill the reaction chamber with high-purity argon and high-purity hydrogen at a ratio of (hydrogen: argon = 1:3) until the total pressure of the chamber is 0.09MPa, and fill with 0.017vol% CH 4 gas;

[0056] (4) Turn on the power supply of the resistance heating table, control the surface temperature of the resistance heating table to be 550 ° C, and heat the Mg block through the resistance heating table; after the Mg starts to evaporate, start the plasma power supply, set the current to 60A, and heat the Mg block through the plasma arc. The metal V ingot as a catalyst is heated and evaporated. Th...

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Abstract

The invention provides a preparation method of a catalyst-containing carbon cladded Mg-based hydrogen storage material. According to the preparation method, plasma arc and a resistor heating platformare adopted for heating of a catalyst metal ingot and a Mg block respectively to prepare carbon-cladded Mg-based composite nanometer particles containing a metal catalyst, wherein the Mg particle sizeis lower than 20nm. The preparation method is capable of regulating and controlling the size of generated Mg particles through adjusting Mg mass amount and resistor heating platform temperature; theparticle size of the generated metal catalyst is adjusted through adjusting of plasma current; and the methane adding amount is adjusted so as to obtain ultra-thin carbon shells with a carbon layer thickness lower than 5nm. The Mg-based hydrogen storage material prepared using the preparation method possesses following characteristics: the particle size is small; carbon cladding layers are thin; the catalyst is contained; Mg and catalyst loading rate and hydrogen storage performance can be improved effectively; the raw materials are cheap; the preparation method is simple and convenient; and the preparation process is friendly to the environment.

Description

technical field [0001] The invention relates to a nano hydrogen storage material, in particular to a catalyst-containing carbon-coated Mg-based hydrogen storage material and a preparation method thereof. Background technique [0002] With the depletion of fossil energy and the increasingly serious problem of environmental pollution, hydrogen energy has become one of the ideal energy sources to replace non-renewable energy such as petroleum due to its renewable and non-polluting advantages. As an important link in the hydrogen energy industry chain, hydrogen storage restricts the practical application of hydrogen energy. Therefore, developing a safe and efficient hydrogen storage method is the key to realize the utilization of hydrogen energy. Compared with traditional hydrogen storage methods, metal hydride hydrogen storage has the advantages of high hydrogen storage density and high reliability. Among metal hydride hydrogen storage materials, Mg has become one of the most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00
CPCY02E60/32
Inventor 刘彤胡苗苗陈明
Owner BEIHANG UNIV
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