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A method for improving catalytic performance of a transition metal composite material

A composite material and transition metal technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficulty in improving the catalytic properties of transition metal composite materials, and achieve easy operation and good application prospects. , the effect of increasing the specific surface area

Pending Publication Date: 2018-12-18
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the nature and layered structure of the transition metal composite material itself determine that it is difficult to further improve its catalytic properties.

Method used

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  • A method for improving catalytic performance of a transition metal composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This example prepares the catalytic material of molybdenum phosphide composite material, and the synthesis steps are as follows:

[0021] Will (NH 4 ) 6 Mo 7 o 24 4H 2 O (0.0140g), metal microparticles (0.1mg / mL, 10mL), (NH 4 ) 2 HPO 4 (0.0017g) and H 2 O (15mL) was prepared into a mixed solution, stirred at room temperature for 3 hours, and the uniformly mixed solution was transferred to a 50mL hydrothermal reaction kettle, and then put into a Ni mesh substrate, and the temperature was raised to 110 at a rate of 5°C / min. ℃ oven for 8 hours. After the reaction is finished, cool down to room temperature naturally, rinse with distilled water, and repeat this process 3 to 5 times to obtain the modified transition metal composite material.

[0022] After testing, the morphology and structure of the prepared transition metal composites are lamellar structures, from figure 1 It can be seen that the transition metal composite is covered with a lamellar structure.

Embodiment 2

[0024] Will (NH 4 ) 6 Mo 7 o 24 4H 2 O (0.0140g), graphene (0.1mg / mL, 10mL), (NH 4 ) 2 HPO 4 (0.0017g) and H 2 O (20mL) was prepared into a mixed solution, placed at room temperature and stirred for 3 hours, and the evenly mixed solution was transferred to a 50mL hydrothermal reaction kettle, then put into a copper mesh substrate, and heated to 250°C at a rate of 0.1°C / min. ℃ oven for 0.5 hours. After the reaction is finished, cool down to room temperature naturally, rinse with distilled water, and repeat this process 3 to 5 times to obtain the modified transition metal composite material.

Embodiment 3

[0026] Will (NH 4 ) 6 Mo 7 o 24 4H 2 O (0.0140g), graphene (0.1mg / mL, 10mL), (NH 4 ) 2 HPO 4 (0.0017g) and H 2 O (20mL) was prepared into a mixed solution, placed at room temperature and stirred for 3 hours, the uniformly mixed solution was transferred to a 50mL hydrothermal reaction kettle, and then put into a titanium mesh substrate, and the temperature was raised to 80°C at a rate of 20°C / min. ℃ oven for 50 hours. After the reaction is finished, cool down to room temperature naturally, rinse with distilled water, and repeat this process 3 to 5 times to obtain the modified transition metal composite material.

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Abstract

A method for improving catalytic performance of a transition metal composite material is disclosed. The method includes dissolving a transition metal sulfide, oxide, selenide or phosphide into a solvent to obtain a transition metal solution; slowly adding a metal nitrate, acetate or nitrate into a solvent, and reacting the mixture for 2-5 min after mixing to generate a precipitate; transferring the obtained transition metal solution and the precipitate into a hydrothermal reactor; putting a substrate into the reactor; putting the reactor into a drying oven to perform a reaction; naturally cooling the reactor to room temperature after the reaction is finished; washing the substrate with distilled water; and drying the substrate to obtain the transition metal composite material loaded by thesubstrate. The method is simple in process, convenient to operate and low in cost. The electron conduction speed is increased, the specific surface area of the composite material is increased and effects are significant.

Description

technical field [0001] The invention belongs to the technical field of transition metal materials, and in particular relates to a method for improving the catalytic performance of transition metal composite materials. Background technique [0002] Transition metal composites (such as MoS2, WS2, MoP, etc.) have a layered structure, and their edges are more active. They are prepared and modified under conditions to make them exhibit excellent catalytic performance when used as catalysts. The catalytic reaction process of transition metal composites is similar to that of other catalysts. The catalyst and the catalyzed substance undergo surface contact-adsorption and electron transfer processes. The catalytic activity of the catalyst is determined by testing the chemical signal changes of its physical and chemical properties. However, the layered structure of transition metal composites limits the further improvement of its catalytic activity. In view of the defects of this per...

Claims

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Application Information

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IPC IPC(8): B01J27/19
CPCB01J27/19
Inventor 马强刘辉赵晓梦杨雯雯任花萍赵玉真丁思懿田少鹏苗宗成
Owner XIJING UNIV