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Method of synthesizing Pt-Ni catalyst material by hydrothermal method

A catalyst and a hydrothermal method are applied in the field of hydrothermal synthesis of Pt-Ni catalyst materials with a carbon source as a carrier, which can solve the problems of difficulty in large-scale production, high equipment requirements, high price and the like, and achieves low production cost and high production cost. The effect of small equipment investment and low price

Inactive Publication Date: 2013-06-19
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the colloid method, in addition to the reducing agent, an organic stabilizer needs to be added, and the chemical reduction reaction method must add a reducing agent, which makes the follow-up treatment of these two methods cumbersome.
The electrochemical reduction method uses electrons as the reducing agent and clean production, but the equipment requirements are high, the price is expensive, and it is not easy to produce on a large scale. Therefore, the development of the preparation technology of Pt-Ni catalysts with high catalytic activity is still one of the hot issues in current research.

Method used

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  • Method of synthesizing Pt-Ni catalyst material by hydrothermal method
  • Method of synthesizing Pt-Ni catalyst material by hydrothermal method
  • Method of synthesizing Pt-Ni catalyst material by hydrothermal method

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Embodiment 1

[0023] Take 3mL of 5×10 -3 mol / L H 2 PtCl 6 ·6H 2 O solution and 3 mL of 5 x 10 -3 mol / L Ni(NO 3 ) 2 ·6H 2 O solution (Pt:Ni molar ratio 1:1) was mixed to form a solution. Add 20 mg of multi-walled carbon nanotubes to the solution, ultrasonically disperse for 30 min, transfer the solution to an autoclave with a volume of 50 mL, and heat in a muffle furnace for 2 h at 200 °C (slowly from room temperature to 200 °C). After the liquid was filtered off and washed with secondary water, the precipitate was naturally dried at room temperature and ground to obtain Pt-Ni catalyst nanoparticles attached to multi-walled carbon nanotubes.

[0024] figure 1 The X-ray diffraction analysis in the above shows that the diffraction peak near 26.24° in the XRD spectrum of the prepared Pt-Ni / MWCNTs catalyst nanoparticles is the diffraction peak of the C (002) crystal plane. The diffraction peaks at 39.834°, 46.387°, 64.655°, and 81.508° correspond to (111), (200), (220), (311) crystals...

Embodiment 2

[0028] Take 3mL of 5×10 -3 mol / L H 2 PtCl 6 ·6H 2 O solution and 6 mL of 5 x 10 -3 mol / L Ni(NO 3 ) 2 ·6H 2 O solution (Pt:Ni molar ratio 1:2) was mixed to form a solution. Add 20 mg of multi-walled carbon nanotubes to the solution, ultrasonically disperse for 30 min, transfer the solution to an autoclave with a volume of 50 mL, and heat in a muffle furnace at 200 °C (slowly warming from room temperature to 250 °C) for 2 h. After filtering off the liquid and rinsing and filtering with secondary water, the precipitate was naturally dried at room temperature, and the Pt-Ni catalyst powder was obtained after grinding.

Embodiment 3

[0030] Take 3mL of 5×10 -3 mol / L H 2 PtCl 6 ·6H 2 O solution and 3 mL of 5 x 10 -3 mol / L Ni(NO 3 ) 2 ·6H 2 O solution (Pt:Ni molar ratio 1:1) was mixed to form a solution. Add 30 mg graphene to the solution, ultrasonically disperse for 30 min, transfer the solution to a 50 mL autoclave, and heat it in a muffle furnace at 200 °C (slowly from room temperature to 200 °C) for 2 h. After filtering off the liquid and rinsing and filtering with secondary water, the precipitate was naturally dried at room temperature, and the graphene-supported Pt-Ni catalyst powder was prepared after grinding.

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Abstract

The invention discloses a method of synthesizing a Pt-Ni catalyst material by a hydrothermal method. The method comprises the following steps of: preparing a Pt source and a Ni source into a solution by secondary water and mixing, adding a carbon source in the mixing solution, and carrying out ultrasonic dispersion on the mixing solution; transferring the mixing solution in a high pressure kettle, and carrying out constant temperature heating; and filtering a liquid, and naturally drying under the room temperature after filtering and depositing, thus obtaining a Pt-Ni nano-catalyst material taking the carbon source as a carrier. The method is simple, a toxic substance is not participated in and released, and the Pt-based nano-particles generation is proved through an X-ray diffraction test; an electrochemical method of a cyclic voltammetry (CV) is utilized to test the catalysis action of the ethanol electrooxidation by the Pt-Ni nanometer catalyst, and the result displays that the synthesizing Pt-Ni catalyst has high catalytic activity on ethanol electrooxidation; and the Ni addition is contributed to the catalytic action, meanwhile, the preparation cost of a Pt-based catalyst is reduced, and the method has high business application value.

Description

[0001] technical field [0002] The invention relates to a method for synthesizing a Pt-Ni catalyst material with a carbon source as a carrier by a hydrothermal method, and belongs to the technical field of energy materials. Background technique [0003] Scientific studies have shown that metal platinum (Pt) has high electrocatalytic activity for ethanol oxidation. However, in the process of catalyzing ethanol oxidation, platinum is prone to poisoning caused by the adsorption of by-products such as CO. At the same time, platinum is scarce and expensive on earth. Therefore, in order to reduce the cost, improve the catalytic activity of the catalyst, and increase the anti-poisoning ability of by-products, a variety of platinum-based binary metal catalysts such as Pt-Ru have been developed, among which Pt-Ni catalysts are considered to be in alkaline media. It has good catalytic performance for the oxidation of ethanol. The preparation methods of binary metal Pt-Ni cataly...

Claims

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Application Information

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IPC IPC(8): B01J23/89
Inventor 丁克强王亚辉王庆飞
Owner HEBEI NORMAL UNIV
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