Method for preparing self-doped double-function oxygen reaction electrocatalyst

An electrocatalyst and self-doping technology, used in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as environmental pollution, reduce environmental pollution, High yield, performance-enhancing effect

Active Publication Date: 2016-12-14
UNIV OF SCI & TECH LIAONING
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  • Application Information

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Problems solved by technology

On the other hand, coal is one of the three major energy sources abundant on the earth, and the traditional way of burning energy to obtain energy has caused serious environmental pollution. Therefore, improving the environment-friendly and high value-added utilization of coal resources is the future development trend

Method used

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  • Method for preparing self-doped double-function oxygen reaction electrocatalyst
  • Method for preparing self-doped double-function oxygen reaction electrocatalyst
  • Method for preparing self-doped double-function oxygen reaction electrocatalyst

Examples

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Effect test

Embodiment 1

[0029] Xinjiang lignite was used as the raw material (see figure 1 ), ground in an agate mortar for 5-10 minutes to crush it to more than 200 meshes, and calcined at 800°C for 2 hours in a mixed atmosphere of ammonia and argon (volume ratio of 1:9), and the reactor was After naturally cooling to room temperature under the protection of argon, the sample was taken out to obtain the coal-based self-doped oxygen reaction electrocatalytic material. The XRD results show that the oxygen-reactive electrocatalytic material prepared by high-temperature heat treatment in an ammonia environment contains a higher graphite structure than the original coal, see figure 2 , the lower line represents the original coal sample, and the upper line is the coal-based oxygen-reactive electrocatalytic material after direct high-temperature treatment in the ammonia environment; XPS results show that after the high-temperature heat treatment process in the ammonia environment, the oxygen-reactive elec...

Embodiment 2

[0031] Using Inner Mongolia lignite as raw material, EDX elemental analysis see Figure 4 , Grinding in an agate mortar for 5-10 minutes to obtain particles above 200 meshes, calcined at 700°C for 3 hours in an atmosphere of ammonia and argon (volume ratio: 2:8), and the reactor was protected by argon After naturally cooling to room temperature, the sample was taken out to obtain the coal-based self-doped oxygen reaction electrocatalytic material. The XRD results show that the oxygen-reactive electrocatalytic material prepared by high-temperature heat treatment in an ammonia environment has a higher graphite structure than the original coal; the electrochemical test results show that the oxygen-reactive electrocatalytic material has a good oxygen reduction onset voltage and activity and optional, see Figure 5 , the upper curve is the original coal sample, and the lower curve is the coal-based oxygen reaction electrocatalytic material after direct high temperature treatment i...

Embodiment 3

[0033] Shanxi anthracite is used as raw material, ground in an agate mortar for 5-10 minutes to obtain particles with a particle size of 200 mesh or more, and calcined at 900°C for 2 After hours, the reactor was naturally cooled to room temperature under the protection of inert argon, and the sample was taken out to obtain the coal-based self-doping oxygen reaction electrocatalytic material. The results of electrochemical tests show that the oxygen-reactive electrocatalytic material has a good initial voltage and activity of water decomposing oxygen, see Figure 6 .

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Abstract

The invention relates to a method for preparing a self-doped double-function oxygen reaction electrocatalyst. The method comprises the following steps: pulverizing coal to 200 meshes or above, and calcining at 500-1050 DEG C in an ammonia gas-inert gas atmosphere for 1-3 hours, wherein the heating speed is controlled at 2-10 DEG C / minute in the process; and at the gas speed of 50-200 sccm, naturally cooling under the protection of inert gas or ammonia gas-inert gas mixture, and taking the product out of the reactor, thereby obtaining the oxygen reaction electrocatalytic material with double functions of self-doped oxygen reduction and hydrolytic oxygen production. The method greatly reduces the problem of environment pollution in the traditional energy acquisition process by coal resource combustion, successfully performs deep processing on the low-value coal by simply using the one-step process so as to enhance the added value of the low-value coal, and prepares the green-battery self-doped oxygen reaction electrocatalytic material applicable to new energy conversion and storage systems.

Description

technical field [0001] The invention belongs to the field of oxygen reaction electrocatalytic materials for new energy batteries, and in particular relates to a method for preparing self-doped bifunctional oxygen reaction electrocatalysts by using coal. Background technique [0002] The exhaust gas emitted by vehicles powered by petroleum products has become the main source of pollution affecting the earth's climate and urban environment. In addition, the problem of energy shortage is becoming more and more serious. Therefore, energy and environmental issues have become the biggest obstacle to the development of traditional automobiles, and finding and developing "low-carbon green new energy" has become an important content of human civilization in this century. With the rise of new energy battery vehicles, further improving the operating efficiency and reducing the cost of various green batteries is one of the important contents of related research fields in this century. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90B01J21/18B01J23/745B01J23/75
CPCB01J21/18B01J23/745B01J23/75H01M4/8825H01M4/9091Y02E60/50
Inventor 陈星星黄新宁
Owner UNIV OF SCI & TECH LIAONING
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