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Composite material with nano-nickel particles and nano-palladium particles on graphene and preparation method of composite material

A composite material and nano-nickel technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of undiscovered graphene and missing carbon atoms, etc. To achieve the effect of short experiment period, good dispersion and easy operation

Inactive Publication Date: 2016-05-25
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, researchers have not found any missing carbon atoms in graphene

Method used

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  • Composite material with nano-nickel particles and nano-palladium particles on graphene and preparation method of composite material
  • Composite material with nano-nickel particles and nano-palladium particles on graphene and preparation method of composite material
  • Composite material with nano-nickel particles and nano-palladium particles on graphene and preparation method of composite material

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Experimental program
Comparison scheme
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Embodiment 1

[0048] This embodiment prepares a graphene-loaded nano-nickel particle and palladium particle composite material, wherein the mass ratio of the nano-nickel particle, nano-palladium particle and graphene is 1:1:8, and the nano-nickel particle loaded on the graphene surface The average particle sizes of nickel particles and palladium particles are respectively 21nm and 9nm, which are prepared by the following method:

[0049] (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;

[0050] (2) 0.8g functionalized graphene powder and 0.4955gNi(NO 3 ) 2 ·6H 2 O (the mass ratio of nickel to graphene is 1:8) was added to 30mL of acetone reagent, mixed ultrasonically and then dried at 80°C; the dried powder was placed in an argon atmosphere at 400°C Calcined for 4 hours, then reduced in a h...

Embodiment 2

[0056] This embodiment prepares a graphene-loaded nano-nickel particle and palladium particle composite material, wherein the mass ratio of the nano-nickel particle, nano-palladium particle and graphene is 1:1:3, and the nano-nickel particle loaded on the graphene surface The average particle size of nickel particle and palladium particle is respectively 22nm, 9nm, and it adopts following method to prepare:

[0057] (1) Put graphene nanosheets into concentrated HNO 3 In the solution, reflux at 140°C for 8 hours, cool to room temperature, wash with deionized water to neutrality and dry to obtain functionalized graphene powder;

[0058] (2) 0.6g functionalized graphene powder and 0.9910gNi(NO 3 ) 2 ·6H 2 O (the mass ratio of nickel to graphene is 1:3) was added to 30mL of acetone reagent, mixed ultrasonically and then dried; the dried powder was calcined in an argon atmosphere at 400°C for 4h, and then heated at 450°C Reduction in a hydrogen atmosphere for 4 hours, and final...

Embodiment 3

[0063] This embodiment prepares a graphene-loaded nano-nickel particle and palladium particle composite material, wherein the mass ratio of the nano-nickel particle, nano-palladium particle and graphene is 3:3:4, and the nano-nickel particle loaded on the graphene surface The average particle size of nickel particle and palladium particle is respectively 24nm, 12nm, and it adopts following method to prepare:

[0064] (1) Put graphene nanosheets into concentrated HNO 3 In the solution, reflux at 140°C for 8 hours, cool to room temperature, wash with deionized water to neutrality and dry to obtain functionalized graphene powder;

[0065] (2) 0.4g functionalized graphene powder and 1.4865gNi(NO 3 ) 2 ·6H 2 O (the mass ratio of nickel to graphene is 3:4) was added to 30mL of acetone reagent, mixed ultrasonically and then dried; the dried powder was calcined in an argon atmosphere at 400°C for 4h, and then heated at 450°C Reduction in a hydrogen atmosphere for 4 hours, and fina...

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Abstract

The invention discloses a composite material with nano-nickel particles and nano-palladium particles on graphene and a preparation method of the composite material. According to the composite material, a graphene surface is loaded with the nano-nickel particles and the nano-palladium particles with regular morphology and uniform particle size distribution, wherein the mass percent of graphene is 40%-80%, the mass percent of the nano-nickel particles is 10%-30%, and the mass percent of the nano-palladium particles is 10%-30%. Raw materials for the preparation method are available and lower in cost; the method is simpler and easy to operate. The synthesized composite material with bi-metal nano-nickel particles and nano-palladium particles on graphene not only has excellent characteristics of graphene, but also has excellent catalytic performance of nickel and palladium nanoparticles and can be widely applied to the fields of catalysts, hydrogen storage materials, battery materials, supercapacitors and the like.

Description

technical field [0001] The invention relates to a graphene-supported nano-nickel particle and palladium particle composite material and a preparation method thereof, belonging to the field of preparation of catalytic materials. Background technique [0002] Studies in recent years have found that many catalysts have a good effect on improving the hydrogen absorption and desorption performance of magnesium-based hydrogen storage materials. Catalysts play an important role in enhancing the hydrogen absorption and desorption rates of metal hydrides, which can rapidly and efficiently promote the decomposition of hydrogen molecules. High-efficiency catalysts can greatly improve the hydrogen absorption and desorption performance of materials even if only a small amount is added. Finding a more suitable catalyst to improve the hydrogen storage performance of materials is a research hotspot. [0003] Among various catalysts, transition group metals (such as Ni, Cu, Pd and Co, etc....

Claims

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Application Information

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IPC IPC(8): B01J23/89
CPCB01J23/892B01J35/393
Inventor 原建光李李泉武英朱云峰况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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