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A preparation method of heterostructure loaded self-supporting catalytic electrode

A catalytic electrode and heterogeneous structure technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of large-scale application of catalytic effect can not be quantified calculation, lack of active sites, insufficient conductivity, etc., to achieve a large-scale industrialization The effect of production prospect, convenient operation and low cost

Active Publication Date: 2022-02-18
HENAN SAIMEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problems faced by these transition metal sulfide materials for industrial application are 1. Lack of active sites; 2. Insufficient conductivity; 3. Inability to process
Although some researches have increased the active sites by nanonizing and homogenizing material particles or controlling the crystal growth direction, these studies are mainly based on powders, and the performance obtained is only small-scale performance, but large-scale application of catalysis The effect will not be quantified purely based on small scale

Method used

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  • A preparation method of heterostructure loaded self-supporting catalytic electrode
  • A preparation method of heterostructure loaded self-supporting catalytic electrode
  • A preparation method of heterostructure loaded self-supporting catalytic electrode

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preparation example Construction

[0027] A method for preparing a self-supporting catalytic electrode supported by a heterogeneous structure, mainly comprising the following steps:

[0028] Step 1: According to the demand size of the final product, weigh a certain amount of metal powder and select a suitable graphite mold, and slowly pour the metal powder into the graphite mold.

[0029] For example, according to the size of the final product, determine the volume and shape parameters, so as to select the appropriate size graphite mold, and estimate the quality of the required powder by the product of volume and density.

[0030] Step 2. Put the graphite mold filled with metal powder obtained in step 1 into a spark plasma sintering furnace (SPS for short), and pre-sinter the metal powder.

[0031] The SPS pre-sintering temperature selected here is 100°C-300°C, and the heating rate is 50-100°C / min. The temperature and heating rate need to be strictly controlled. If the temperature is too low, the forming degre...

Embodiment 1

[0041] (1) take by weighing the nickel powder of 3g, select diameter to be Slowly pour the nickel powder into the graphite mold.

[0042] (2) Put the graphite mold containing the nickel powder obtained in step (1) into an SPS discharge plasma sintering furnace, and pre-sinter the metal nickel powder. The SPS pre-sintering temperature is 100° C., and the heating rate is 50° C. / min.

[0043] (3) Take out the pre-sintered metal nickel sample from the SPS spark plasma sintering furnace in step (2), and immediately put it into a tube furnace with argon gas, and re-sinter the metal nickel sample. The sintering temperature of the tube furnace is 300° C., the heating rate is 5° C. / min, and the argon flow rate is 10 sccm.

[0044] (4) Weigh a certain amount of sodium molybdate and thioacetamide, dissolve the two in distilled water and fully stir to form a mixed solution, which is set aside. The molar ratio of sodium molybdate to thioacetamide is 1:3, and the concentration of sodium...

Embodiment 2

[0049] (1) Take by weighing 3g of iron powder, select diameter as Slowly pour the iron powder into the graphite mold.

[0050] (2) Put the graphite mold equipped with metal iron powder obtained in step (1) into an SPS discharge plasma sintering furnace, and pre-sinter the metal iron powder. The SPS pre-sintering temperature is 300°C, and the heating rate is 100°C / min.

[0051] (3) Take out the pre-sintered metal sample from the SPS sintering furnace in step (2), and immediately put it into a tube furnace filled with argon, and re-sinter the metal sample. The sintering temperature of the tube furnace is 900° C., the heating rate is 10° C. / min, and the argon flow rate is 30 sccm.

[0052] (4) Weigh a certain amount of sodium molybdate and thioacetamide, dissolve the two in distilled water and fully stir to form a mixed solution, which is set aside. The molar ratio of sodium molybdate to thioacetamide is 1:5, and the concentration of sodium molybdate in the mixed solution is ...

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Abstract

The invention relates to a method for preparing a self-supporting catalytic electrode with a heterogeneous structure. The metal powder is sintered twice to form a porous structure, and then the sintered metal powder is mixed with ammonium molybdate and thioacetamide. The hydrothermal reaction is carried out together with the liquid, and after the hydrothermal reaction is completed, the product is washed and dried to obtain the heterostructure-loaded self-supporting catalytic electrode. The invention has lower cost, more convenient operation and stronger applicability. The prepared heterostructure-loaded self-supporting catalytic electrode has high catalytic activity, good electrical conductivity, certain mechanical properties and processability, and can be used not only as a catalyst but also as a current collector, especially as an electrode directly. Catalytic water splitting for hydrogen production has broad prospects for large-scale industrial production and application.

Description

technical field [0001] The invention relates to the technical field of preparation of catalytic materials, in particular to a preparation method of heterostructure-loaded self-supporting catalytic electrodes, which belongs to a technical application of powder metallurgy preparation of catalytic materials. Background technique [0002] In order to cope with the huge pressure and challenges brought by the excessive consumption of fossil energy and environmental pollution, it has become urgent to develop alternatives to fossil energy, and hydrogen energy is considered to be the most potential clean energy. The development and utilization of hydrogen energy must first solve the problem of cheap hydrogen and large-scale production. Electrocatalytic water separation for hydrogen is an ancient and mature technology, which has the advantages of simple process, high product purity, clean and pollution-free. However, the most active hydrogen evolution catalyst is the platinum group n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/052C25B11/061C25B11/075B22F3/105B22F3/10C23C26/00
CPCC25B1/04B22F3/105B22F3/1007C23C26/00B22F2003/1051Y02E60/36
Inventor 潘昆明魏世忠赵阳夏梁彬吴宏辉徐流杰张玢于华张程陈冲毛丰周玉成李秀青熊美王晓东肖利强王飞鸿张晨阳李雪荣
Owner HENAN SAIMEI TECH CO LTD