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Method for preparing non-noble metal molybdenum carbide catalyst by cold plasma

A precious metal molybdenum carbide, cold plasma technology, applied in physical/chemical process catalysts, non-metallic elements, chemical instruments and methods, etc., can solve the problems of agglomeration of molybdenum carbide materials, complex preparation process, difficult to control, etc., to achieve crystal perfection , the operation process is simple, the effect of low price

Active Publication Date: 2019-03-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional molybdenum carbide preparation process requires high-temperature roasting, and the roasting temperature is even as high as 1000 ° C, and there are strict requirements on the roasting atmosphere, which needs to be processed under a reducing atmosphere (H 2 +CH 4 ) to prepare molybdenum carbide catalysts with excellent catalytic performance
In addition, the traditional preparation process is complex, difficult to control, and prone to agglomeration and collapse of molybdenum carbide materials

Method used

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  • Method for preparing non-noble metal molybdenum carbide catalyst by cold plasma
  • Method for preparing non-noble metal molybdenum carbide catalyst by cold plasma
  • Method for preparing non-noble metal molybdenum carbide catalyst by cold plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 46mg of ammonium molybdate, 0.5g of glucose and 90mg of polystyrene balls in 40mL of deionized water, mix them evenly and fully dissolve, add the obtained clear solution into a 50mL polytetrafluoroethylene reactor, and place the reactor in Hydrothermal reaction in an oven at 180°C for 12 hours, then naturally cooled to room temperature, and the product was centrifuged, washed and dried to obtain the precursor;

[0027] Put the precursor into an open quartz boat, and place the quartz boat between the two electrodes in the cold plasma processing equipment; fill the cold plasma processing equipment with argon as an initiating gas, and place the A voltage of 500V is applied between them and treated for 10 minutes to obtain a non-noble metal molybdenum carbide catalyst.

[0028] figure 2 and image 3 They are scanning electron micrographs and X-ray diffraction spectra of the product, respectively. from figure 2 It can be seen that the molybdenum carbide catalyst ...

Embodiment 2

[0031] Weigh 46mg of ammonium molybdate, 0.5g of glucose and 90mg of polystyrene balls in 40mL of deionized water, mix them evenly and fully dissolve, add the obtained clear solution into a 50mL polytetrafluoroethylene reactor, and place the reactor in Hydrothermal reaction was carried out in an oven at 180°C for 12 hours, then naturally cooled to room temperature, and the product was centrifuged, washed and dried to obtain a precursor.

[0032] Put the precursor into an open quartz boat, and place the quartz boat between the two electrodes in the cold plasma processing equipment; fill the cold plasma processing equipment with argon as an initiating gas, and place the A voltage of 1000V was applied between them, and the non-noble metal molybdenum carbide catalyst was prepared after treatment for 20 minutes.

[0033] The morphology of the samples obtained in this example is similar to that of Example 1, with uniform particle size, good dispersion and perfect crystals.

[0034]...

Embodiment 3

[0036] Weigh 46mg of ammonium molybdate, 0.5g of glucose and 90mg of polystyrene balls in 40mL of deionized water, mix them evenly and fully dissolve, add the obtained clear solution into a 50mL polytetrafluoroethylene reactor, and place the reactor in Hydrothermal reaction was carried out in an oven at 180°C for 12 hours, then naturally cooled to room temperature, and the product was centrifuged, washed and dried to obtain a precursor.

[0037] Put the precursor into an open quartz boat, and place the quartz boat between the two electrodes in the cold plasma processing equipment; fill the cold plasma processing equipment with argon as an initiating gas, and place the A voltage of 1000V was applied between them, and the non-noble metal molybdenum carbide catalyst was prepared after treatment for 30 minutes.

[0038] The morphology of the samples obtained in this example is similar to that of Example 1, with uniform particle size, good dispersion and perfect crystals.

[0039]...

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Abstract

The invention discloses a method for preparing a non-noble metal molybdenum carbide catalyst using cold plasma. It uses molybdate, glucose and polystyrene balls as raw materials, and prepares a precursor through hydrothermal reaction; and then puts the precursor into cold plasma. The non-noble metal molybdenum carbide catalyst is obtained by processing it in the body treatment equipment. The preparation method of the present invention has the characteristics of low temperature, green, controllable, simple, efficient, etc. The prepared non-noble metal molybdenum carbide catalyst has a particle size of nanometer, high stability, large specific surface area, and higher catalytic activity than noble metal-based catalysts. and other notable features.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a method for preparing a non-noble metal molybdenum carbide catalyst. Background technique [0002] Noble metal-based catalysts, such as gold (Au), platinum (Pt), and palladium (Pd), are widely used in photocatalytic water splitting, photocatalytic CO 2 Reduction, methane CO 2 Reforming, methane steam reforming, CO methanation, etc. These noble metal-based catalysts exhibit high catalytic activity, but are not suitable for large-scale industrial applications due to their high cost and resource shortage. In recent years, non-noble metal molybdenum carbide (Mo 2 C) Catalysts in photocatalytic water splitting, photocatalytic CO 2 Reduction, methane CO 2 Reforming, methane steam reforming, CO methanation and other processes have shown good application prospects. It has activity and stability comparable to noble metals, and its low price and abundant sources make it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22C01B3/04
CPCC01B3/042B01J27/22B01J37/347B01J35/39Y02E60/36
Inventor 潘云翔孙正庆崔宇彭俊保
Owner HEFEI UNIV OF TECH
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