Graphene loaded palladium-nickel/cerium oxide nano composite material, preparation method and amino borane catalytic decomposition method

A nanocomposite material, catalytic decomposition technology, applied in the catalytic decomposition of ammonia borane, graphene-supported palladium nickel / cerium oxide nanocomposite materials, the preparation field, can solve the non-precious metal nanoparticles easy to aggregate, precious metal storage is limited, limit the application And other issues

Inactive Publication Date: 2017-02-08
ANHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] 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) limited and expensive storage of noble metals limits their application in practical production; (2) non-noble metal nanoparticles are prone to aggregation, which will affect the catalytic activity

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  • Graphene loaded palladium-nickel/cerium oxide nano composite material, preparation method and amino borane catalytic decomposition method
  • Graphene loaded palladium-nickel/cerium oxide nano composite material, preparation method and amino borane catalytic decomposition method
  • Graphene loaded palladium-nickel/cerium oxide nano composite material, preparation method and amino borane catalytic decomposition method

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preparation example Construction

[0028] The invention provides a method for preparing graphene-supported palladium nickel / cerium oxide nano composite material, which is characterized in that it comprises:

[0029] 1) Mixing graphene oxide, cetyltrimethylammonium bromide and water to prepare a graphene oxide activation system;

[0030] 2) Disperse the nickel source, the palladium source and the cerium source in the graphene oxide activation system, and then add a reducing agent to the system to perform a reduction reaction to prepare the graphene-supported palladium nickel / cerium oxide nanocomposite material.

[0031] In step 1) of the above preparation method, the amount of each material can be selected in a wide range, but in order to enable the graphene oxide to be fully activated, so that the prepared graphene supported palladium nickel / cerium oxide nanocomposite material has more Excellent catalytic performance. Preferably, in step 1), relative to 10 mg of graphene oxide, the amount of cetyltrimethylammonium bro...

Embodiment 1

[0047] Dissolve 10mg graphene oxide and 15mg cetyltrimethylammonium bromide in 5mL ultrapure water, and sonicate for 10min; then 4.8mg nickel chloride hexahydrate, 14.2mg palladium chloride and 7.1mg cerium nitrate hexahydrate Add to the system, stir under magnetic stirring for 1 hour to make the solution evenly dispersed; then quickly add 30 mg of sodium borohydride to the mixed solution, continue to stir at 25 ℃ for 4 hours; finally use anhydrous ethanol, ultrasonic centrifugal washing three times, and vacuum drying. Nanocomposite Pd 0.8 Ni 0.2 @CeO x / rGO (The molar ratio of Pd to Ni is 0.8:0.2, and Ce / (Pd+Ni+Ce) is 13.9 mol%).

Embodiment 2

[0049] Pd according to the method of Example 1 0.9 Ni 0.1 @CeO x / rGO (Pd, Ni molar ratio is 0.9:0.1, Ce / (Pd+Ni+Ce) is 13.9mol%), the difference is: the amount of nickel chloride hexahydrate is 2.4mg, and the amount of palladium chloride is 15.9mg.

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Abstract

The invention discloses a graphene loaded palladium-nickel / cerium oxide nano composite material, a preparation method and an amino borane catalytic decomposition method. The preparation method comprises the following steps of: 1) mixing graphene oxide, hexadecyl trimethyl ammonium bromide and water so as to obtain a graphene oxide activating system; and 2) dispersing a nickel source, a palladium source and a cerium source into the graphene oxide activating system, and adding a reducing agent into the system for a reduction reaction, thereby obtaining the graphene loaded palladium-nickel / cerium oxide nano composite material. By adopting the preparation method, the graphene loaded palladium-nickel / cerium oxide nano composite material prepared by using a one-step method has an excellent catalysis effect on amino borane, and meanwhile the preparation method is simple in step, gentle and controllable in condition and good in environment-friendliness. In addition, by adopting the graphene loaded palladium-nickel / cerium oxide nano composite material, decomposition of the amino borane can be efficiently catalyzed.

Description

Technical field [0001] The invention relates to a nano composite material, in particular to a graphene loaded palladium nickel / cerium oxide nano composite material, a preparation method and a method for catalytic decomposition of ammonia borane. Background technique [0002] With the development of population and economy, people's demand for efficient energy is increasing. Traditional energy sources such as coal, oil, and natural gas are not renewable, and 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 has environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/16C01B3/06
CPCB01J23/002B01J23/894B01J35/006B01J37/16B01J2523/00C01B3/068C01B2203/1052C01B2203/1064C01B2203/1082B01J2523/3712B01J2523/824B01J2523/847Y02E60/36
Inventor 周映华王苏琴张志严
Owner ANHUI NORMAL UNIV
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