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CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for fuel cell and preparation method of hydrogen storing alloy

A hydrogen storage alloy and fuel cell technology, applied in the field of hydrogen storage alloy materials, can solve the problems of difficulty in meeting the large-scale preparation of materials, inability to add catalysts, low efficiency of preparation materials, etc., so as to improve the thermodynamic and kinetic properties of hydrogen absorption and desorption, The effect of improving the stability of hydrogen absorption and desorption cycle, the thermodynamics and kinetics of hydrogen absorption and desorption

Active Publication Date: 2017-05-10
INNER MONGOLIA UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rapid quenching method cannot add the catalyst and make the catalyst evenly distributed in the alloy
Mechanical ball milling is an effective method to obtain nano-alloy particles, and can easily add various catalysts, but the efficiency of preparing materials is low, and it is difficult to meet the large-scale preparation of materials

Method used

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  • CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for fuel cell and preparation method of hydrogen storing alloy
  • CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for fuel cell and preparation method of hydrogen storing alloy
  • CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for fuel cell and preparation method of hydrogen storing alloy

Examples

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preparation example Construction

[0025] Such as figure 1 As shown, the CeO according to the present invention 2 +MoS 2A method for preparing a high-capacity hydrogen storage alloy for a composite catalytic fuel cell, comprising the steps of:

[0026] Ingredient S101: Composition Y according to chemical formula 1-x Ti x Mg 12-y-z Ni y Al z Perform batching, where 0.03≤x≤0.15, 0.3≤y≤1, 0.1≤z≤0.5. Wherein, the magnesium and rare earth elements in the composition of the chemical formula can increase the burning loss by 5%-10% when proportioned.

[0027] Preparation of master alloy S102: Put the above ingredients in the crucible, and put the magnesium on the top layer of the crucible, and then put it in a vacuum of 1×10 -2 ~5×10 -5 Under the condition of Pa, an inert gas of 0.01MPa~0.1MPa is introduced as a protective gas, then heated to 1400℃~1600℃, and kept for 1min~5min to obtain molten Y 1-x Ti x Mg 12-y-z Ni y Al z liquid master alloy, then the molten Y 1-x Ti x Mg 12-y-z Ni y Al z The liqu...

Embodiment 1

[0032] Embodiment 1 provides a kind of CeO 2 +MoS 2 A high-capacity hydrogen storage alloy for a composite catalytic fuel cell, comprising the following components: Y 1-x Ti x Mg 12-y-z Ni y Al z +m wt.%(CeO 2 +MoS 2 ), where x, y, z are atomic ratios, and m is CeO 2 +MoS 2 The mass percentage; Among them, CeO 2 with MoS 2 The mass ratio is 1:1, x=0.05, y=0.8, z=0.2, m=5, and its composition chemical formula is: Y 0.95 Ti 0.05 Mg 11 Ni 0.8 Al 0.2 +5wt.% (CeO 2 +MoS 2 ).

[0033] CeO in this example 2 +MoS 2 The method for preparing a high-capacity hydrogen storage alloy for a composite catalytic fuel cell comprises the following steps:

[0034] a. Ingredients: Composition Y according to chemical formula 0.95 Ti 0.05 Mg 11 Ni 0.8 Al 0.2 Carry out batching, select bulk rare earth metal yttrium, metal titanium, metal magnesium, metal nickel, metal and aluminum, weigh 436.3 grams of rare earth metal yttrium, metal titanium 11.8 grams, metal magnesium 1420....

Embodiment 2

[0039] The difference between embodiment 2 and embodiment 1 is only that the CeO provided by embodiment 2 2 +MoS 2 A high-capacity hydrogen storage alloy for a composite catalytic fuel cell, the chemical formula of which is: Y 0.95 Ti 0.05 Mg 11 Ni 0.8 Al 0.2 +3wt.% (CeO 2 +MoS 2 ).

[0040] CeO of Example 2 2 +MoS 2 In the method for preparing a high-capacity hydrogen storage alloy for a composite catalytic fuel cell, in the ball milling step, 50 g of sieved alloy powder and CeO 2 and MoS 2 0.75g each, put them together into a stainless steel ball mill jar, vacuumize and fill with high-purity argon, and then seal it. The rest of the steps are the same.

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Abstract

The invention relates to CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for a fuel cell. The hydrogen storing alloy comprises Y1-xTixMg12-y-zNiyAlz and m wt.% of CeO2 and MoS2, according to the formula, x, y and z represent atomic ratios, and m represents the mass percent of the CeO2 and the MoS2; and x is greater than or equal to 0.03 and smaller than or equal to 0.15, y is greater than or equal to 0.3 and smaller than or equal to 1, z is greater than or equal to 0.1 and smaller than or equal to 0.5, m is greater than or equal to 3 and smaller than or equal to 10, and the mass ratio of the CeO2 to the MoS2 is 1:1. According to the CeO2+MoS2 composite catalyzed high-capacity hydrogen storing alloy for the fuel cell of the embodiment of the invention, the stability of alloy hydrides is reduced; and meanwhile, titanium is a hydrogen absorption element, and the hydrogen absorption amount of the alloy can be maintained through the titanium for replacement. A small amount of nickel and aluminum are used for replacing magnesium, the thermostability of the alloy hydrides can be further reduced, and the hydrogen absorption and desorption thermodynamic properties and kinetic properties of magnesium base alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage alloy materials, in particular to a CeO 2 +MoS 2 A high-capacity hydrogen storage alloy for a composite catalytic fuel cell and a preparation method thereof. Background technique [0002] Hydrogen is considered as a clean fuel and will be widely used as a green energy in the 21st century. In particular, the application of hydrogen fuel cells in automobiles will completely solve a series of environmental problems caused by fossil fuels, especially the environmental pollution caused by exhaust emissions from automobiles. The main technical bottleneck of hydrogen as a vehicle fuel is the lack of an efficient and safe hydrogen storage system. [0003] Among all hydrogen storage methods, metal hydride hydrogen storage is considered to be the safest and most reliable, and can meet the requirements for the use of vehicle-mounted fuel cells. Magnesium and magnesium-based alloys are considered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C32/00C22C1/02B22F9/04H01M4/90
CPCB22F9/04B22F2009/048C22C1/02C22C23/06C22C32/00H01M4/905Y02E60/50
Inventor 张羊换冯佃臣孙浩侯忠辉翟亭亭
Owner INNER MONGOLIA UNIV OF SCI & TECH
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