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Graphene-loaded copper and nickel/cerium oxide nanocomposite material, preparation method and ammonia borane catalytic decomposition method

A nanocomposite material and catalytic decomposition technology are applied in the catalytic decomposition of ammonia borane, graphene-supported copper-nickel/cerium oxide nanocomposite materials, and the field of preparation, which can solve the problems of limited storage of precious metals, high price, and influence on catalytic activity.

Inactive Publication Date: 2017-06-13
ANHUI NORMAL UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the catalysts used for the decomposition of ammonia borane include: platinum black, ruthenium nanoparticles and other noble metal catalysts and copper, nickel nanoparticles and other non-noble metal catalysts. Although these catalysts can play a role in catalyzing the decomposition of ammonia borane, there are The following disadvantages: (1) the storage of precious metals is limited and expensive, which limits their application in actual production; (2) non-noble metal nanoparticles are prone to aggregation, which will affect the catalytic activity

Method used

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  • Graphene-loaded copper and nickel/cerium oxide nanocomposite material, preparation method and ammonia borane catalytic decomposition method
  • Graphene-loaded copper and nickel/cerium oxide nanocomposite material, preparation method and ammonia borane catalytic decomposition method
  • Graphene-loaded copper and nickel/cerium oxide nanocomposite material, preparation method and ammonia borane catalytic decomposition method

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preparation example Construction

[0029] The invention provides a method for preparing a graphene-loaded copper-nickel / cerium oxide nanocomposite, characterized in that it comprises:

[0030] 1) graphene oxide and water are mixed to make graphene oxide aqueous solution;

[0031] 2) Disperse the nickel source, copper source and cerium source in the graphene oxide aqueous solution, and then add a reducing agent to the system under nitrogen atmosphere for reduction reaction to prepare graphene-supported copper-nickel / cerium oxide nanocomposites.

[0032] In step 1) of the above-mentioned preparation method, the consumption of each material can be selected in a wide range, but graphene oxide is better dispersed and then the graphene-loaded copper-nickel / cerium oxide nanocomposite material made has better Excellent catalytic performance, preferably, in step 1), relative to 10 mg of graphene oxide, the amount of water used is 5-15 mL.

[0033] In step 1) of the above-mentioned preparation method, the mixing method ...

Embodiment 1

[0048] Dissolve 10 mg of graphene oxide in 5 mL of ultrapure water, and ultrasonicate for 10 min; then add 4.8 mg of nickel chloride hexahydrate, 13.6 mg of copper chloride and 7.1 mg of cerium nitrate hexahydrate into the system, and stir for 1 h under magnetic stirring to make The solution was uniformly dispersed; then, 30 mg of sodium borohydride was quickly added to the mixed solution under a nitrogen atmosphere, and the stirring was continued at 25 °C for 6 h; finally, the nanocomposite Cu 0.8 Ni 0.2 -CeO x / rGO (the molar ratio of Cu and Ni is 0.8:0.2, and Ce / (Cu+Ni+Ce) is 13.9 mol%).

Embodiment 2

[0050] Carry out Cu according to the method for embodiment 1 0.9 Ni 0.1 -CeO x / rGO (the molar ratio of Cu and Ni is 0.9:0.1, Ce / (Cu+Ni+Ce) is 13.9mol%), the difference is: the consumption of nickel chloride hexahydrate is 2.4mg, and the consumption of copper chloride is 15.3 mg.

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Abstract

The invention discloses a graphene-loaded copper and nickel / cerium oxide nanocomposite material, a preparation method and an ammonia borane catalytic decomposition method. The preparation method comprises the steps of (1) mixing graphene oxide and water to prepare a graphene oxide water solution; (2) dispersing a nickel source, a copper source and a cerium source into the graphene oxide water solution, adding a reducing agent to a system in a nitrogen atmosphere and carrying out reducing reaction to prepare the graphene-loaded copper and nickel / cerium oxide nanocomposite material. The graphene-loaded copper and nickel / cerium oxide nanocomposite material prepared through a one-step method has an excellent catalysis effect on ammonia borane; meanwhile, the preparation method is simple in step, mild and controllable in condition and friendly to environment. In addition, decomposition of the ammonia borane can be efficiently catalyzed by using the graphene-loaded copper and nickel / cerium oxide nanocomposite material.

Description

technical field [0001] The invention relates to a nanocomposite material, in particular to a graphene-loaded copper-nickel / cerium oxide nanocomposite material, a preparation method and a catalytic decomposition method for ammonia borane. Background technique [0002] With the development of population and economy, people's demand for high-efficiency energy is increasing. Traditional energy sources such as coal mines, oil, and natural gas are non-renewable, and the combustion products pollute the environment. Therefore, the development of new energy sources has become the primary issue of world development. As a new energy source, hydrogen has a combustion enthalpy of 120mJ kg -1 , is three times that of oil. The combustion product of hydrogen is water, which is the cleanest energy source. However, the most important factor restricting the application of hydrogen energy is the storage and transportation of hydrogen. As one of the hydrogen storage materials, ammonia borane...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/06
CPCB01J23/83C01B3/06Y02E60/36
Inventor 周映华王苏琴张志严
Owner ANHUI NORMAL UNIV
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