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A kind of nanometer magnesium-based hydrogen storage material and preparation method thereof

A hydrogen storage material and nano-magnesium technology, applied in the field of hydrogen storage materials, can solve the problems of unsatisfactory hydrogen absorption and desorption kinetic performance and high hydrogen desorption temperature, achieve good hydrogen absorption and desorption performance, high activity, and improve hydrogen desorption performance. Effect

Active Publication Date: 2022-07-19
JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although through unremitting efforts, the hydrogen absorption temperature of magnesium-based hydrogen storage materials can be reduced to 373K, but its hydrogen absorption and desorption kinetics are still not ideal; in addition, magnesium-based hydrogen storage materials need to be around 573K to fully desorb hydrogen. Hydrogen release temperature is still high

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  • A kind of nanometer magnesium-based hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0046] Embodiment 1 A kind of MgH 2 @5wt%(Sc 2 O 3 +TiO 2 ) Nano-Mg-based hydrogen storage materials

[0047] (1) Preparation of graphene-supported titanium dioxide and scandium trioxide catalyst (wherein the mass ratio of titanium dioxide, scandium trioxide and graphene is 1:1:8):

[0048] 1) Put graphene nanosheets into concentrated HNO 3 In the solution, reflux at 140°C for 8h, cool to room temperature, wash with deionized water until neutral, and dry, wherein the drying temperature is 80°C, to obtain functionalized graphene powder;

[0049] 2) Add 0.8g of functionalized graphene powder and 0.4256g of tetrabutyl titanate to 10mL of isopropanol reagent, stir and mix with magnetic force for 1h to obtain A blend solution; add 0.361g of scandium nitrate monohydrate to 10ml of isopropanol , then add 8ml of water, adjust PH=2-3 by adding concentrated nitric acid, and stir for a period of time to obtain B solution;

[0050] 3) Place solution B in a constant temperature bath ...

Embodiment 2

[0056] Embodiment 2 A kind of nanometer magnesium-based hydrogen storage material

[0057] (1) Preparation of graphene-supported titanium dioxide and scandium trioxide catalyst (wherein the mass ratio of titanium dioxide, scandium trioxide and graphene is 1:1:3):

[0058] 1) Put graphene nanosheets into concentrated HNO 3 In the solution, reflux at 140°C for 8h, cool to room temperature, wash with deionized water until neutral, and dry, wherein the drying temperature is 80°C, to obtain functionalized graphene powder;

[0059] 2) Add 0.6g of functionalized graphene powder and 0.8512g of tetrabutyl titanate to 10mL of isopropanol reagent, stir and mix with magnetic force for 1h to obtain A blend solution; add 0.72g of scandium nitrate monohydrate to 10ml of isopropanol , then add 8ml of water, adjust PH=2-3 by adding concentrated nitric acid, and stir for a period of time to obtain B solution;

[0060] 3) Place solution B in a constant temperature bath at 10°C, stir solution B...

Embodiment 3

[0067] Embodiment 3 A kind of nanometer magnesium-based hydrogen storage material

[0068] (1) Preparation of graphene-supported titanium dioxide and scandium trioxide catalyst (wherein the mass ratio of titanium dioxide, scandium trioxide and graphene is 3:3:4):

[0069] 1) Put graphene nanosheets into concentrated HNO 3 In the solution, reflux at 140°C for 8h, cool to room temperature, wash with deionized water until neutral, and dry, wherein the drying temperature is 80°C, to obtain functionalized graphene powder;

[0070] 2) Add 0.4g of functionalized graphene powder and 1.2768g of tetrabutyl titanate into 10mL of isopropanol reagent, and mix with magnetic stirring for 1h to obtain A blend solution; add 1.08g of scandium nitrate monohydrate to 10ml of isopropanol , then add 8ml of water, adjust PH=2-3 by adding concentrated nitric acid, and stir for a period of time to obtain B solution;

[0071] 3) Place solution B in a constant temperature bath at 10°C, stir solution B...

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Abstract

The invention provides a nano-magnesium-based hydrogen storage material and a preparation method thereof. The nano-magnesium-based hydrogen storage material is made of magnesium, and graphene-supported catalysts of titanium dioxide and scandium trioxide. The preparation method of the nano-magnesium-based hydrogen storage material includes: a pretreatment step: mixing magnesium powder with graphene-supported titanium dioxide and scandium trioxide catalyst powder according to the proportion in the nano-magnesium-based hydrogen storage material , to obtain a mixed powder; the hydrogen combustion synthesis step: subject the mixed powder to hydrogen combustion synthesis to obtain a magnesium-based hydrogen storage material; post-processing step: ball-mill the magnesium-based hydrogen storage material to obtain a nano-magnesium-based hydrogen storage material. The nano-magnesium-based hydrogen storage material prepared by the method of the invention has the characteristics of high activity, high capacity and excellent hydrogen absorption and desorption performance.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a nano-magnesium-based hydrogen storage material and a preparation method thereof. Background technique [0002] Energy is one of the three pillars of the world today and the source of human social activities. With the continuous progress and development of human society, the energy crisis caused by the massive consumption of fossil energy such as coal, oil and natural gas and the environmental problems caused by it are the most severe test that mankind faces in the 21st century. Seeking and developing clean and renewable new energy to replace traditional fossil energy and achieve sustainable development of human society is a serious challenge to all mankind, especially some countries with poor oil resources. Hydrogen energy is considered to be the clean energy with the most development potential in the 21st century due to its large reserves, clean...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/12C22C23/00B22F9/04
CPCB22F1/0003C22C23/00B22F9/04C22C2202/04B22F2009/043
Inventor 原建光武英阎有花张宝周少雄
Owner JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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