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Preparation method and application of perovskite oxide catalyst containing alloy particles

A technology of perovskite oxide and alloy particles, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of easy agglomeration, low catalytic activity, and low electronic conductivity.

Active Publication Date: 2021-04-20
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively low intrinsic catalytic activity and low electronic conductivity of perovskite oxide materials have become the difficulties of research.
Metal element has excellent OER catalytic performance and electronic conductivity, but it is easy to agglomerate in the catalyst preparation process, resulting in the reduction of some active sites, and cannot fully release the catalytic performance of metal element
waste of active sites

Method used

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  • Preparation method and application of perovskite oxide catalyst containing alloy particles
  • Preparation method and application of perovskite oxide catalyst containing alloy particles
  • Preparation method and application of perovskite oxide catalyst containing alloy particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a perovskite oxide catalyst containing alloy particles, comprising the steps of:

[0038] S1. Add 0.0005mol of Co 2 O 3 , 0.0036mol La 2 O 3 , 0.0018mol SrCO 3 and 0.0045mol Fe 2 O 3 Mixed with 10ml of deionized water, and ball-milled at 300rpm for 5h in a ball-milling jar to obtain mixture A;

[0039] S2. The mixture A is calcined in a muffle furnace at 900° C. for 3 hours to obtain sample B;

[0040] S3. The sample B was calcined at 500° C. for 0.5 h in an atmosphere of a mixed gas of hydrogen and nitrogen (hydrogen: nitrogen = 5:95), so that part of the M alloy (CoFe) was changed from (La a Sr b ) x Fe 1-y-z Co y Ru z O3-δ precipitation, thereby obtaining a perovskite oxide catalyst containing alloy particles.

[0041] figure 2 (a) in the figure shows the scanning electron microscope picture of the alloy particle-containing perovskite oxide catalyst obtained in Example 1, which illustrates the analysis of the content of the pero...

Embodiment 2

[0043] A preparation method of a perovskite oxide catalyst containing alloy particles, comprising the steps of:

[0044] S1. Add 0.0005mol of Co 2 O 3 , 0.004mol La 2 O 3 , 0.002mol SrCO 3 , 0.004mol Fe 2 O 3 and 0.001mol RuO 2 Mixed with 15ml of deionized water, and ball-milled at 300rpm for 5h in a ball-milling jar to obtain mixture A;

[0045] S2. The mixture A is calcined in a muffle furnace at 1100° C. for 10 h to obtain sample B;

[0046] S3. The sample B was calcined at 900° C. for 5h in an atmosphere of a mixed gas of hydrogen and nitrogen (hydrogen:nitrogen=20:80), so that part of the M alloy (CoFe) was changed from (La a Sr b ) x Fe 1-y-z Co y Ru z O 3-δ precipitation, thereby obtaining a perovskite oxide catalyst containing alloy particles.

[0047] figure 2 Figure (b) in the figure shows a scanning electron microscope picture of the alloy particle-containing perovskite oxide catalyst obtained in Example 2, illustrating that the sample of Example 2 ...

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Abstract

The invention relates to a preparation method of a perovskite oxide catalyst containing alloy particles, and the method comprises the following steps: S1, mixing raw materials and a solvent, and carrying out ball milling to obtain a mixture A, wherein the raw materials comprise Co3O4, La2O3, SrCO3 and Fe2O3; S2, roasting the mixture A to obtain a sample B; S3, roasting the sample B in mixed gas of reducing gas and inert gas to obtain a product. Through an electrochemical test, the product obtained by the preparation method of the perovskite oxide catalyst containing the alloy particles can be used as an electrocatalyst, and the overpotential required by hydrogen production by water decomposition can be remarkably reduced, so the electrocatalytic performance is improved, the energy waste is reduced, and the energy utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method and application of a perovskite oxide catalyst containing alloy particles. Background technique [0002] With the rapid development of society and science, there is a greater demand and dependence on energy. Traditional energy represented by oil and coal has been over-exploited and used. At the same time, traditional energy has also brought irreparable problems to the environment. Therefore, the development of new energy sources is an inevitable requirement for social development and the realization of sustainable development strategies. As a new type of energy, hydrogen has the advantages of high combustion value, clean and pollution-free combustion products, and convenient storage. It is an ideal sustainable alternative energy. Hydrogen production by electrolysis of water is favored by enterprises because of its simple process, safety and green prepara...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/091C25B11/093
CPCY02E60/36
Inventor 张弛梁一梁萍崔宇刘润君刘君豪杨广俊
Owner WUYI UNIV
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