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A high-performance non-precious metal oxygen evolution catalyst and its preparation method and application

A non-precious metal and catalyst technology, which is applied in the field of high-performance non-precious metal oxygen evolution catalyst and its preparation, can solve the problem that the catalyst activity needs to be improved, and achieve the effects of easy large-scale production, short time consumption and simple preparation method.

Active Publication Date: 2019-01-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity of these catalysts still needs to be improved

Method used

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  • A high-performance non-precious metal oxygen evolution catalyst and its preparation method and application
  • A high-performance non-precious metal oxygen evolution catalyst and its preparation method and application
  • A high-performance non-precious metal oxygen evolution catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 5 mmoles of nickel acetate tetrahydrate in 50 ml of deionized water, add 10 ml of a mixed solution of sodium borohydride with a concentration of 1 mole per liter and sodium hydroxide with a concentration of 0.1 mole per liter, wait for about ten minutes, and the bubbles stop. Wash and centrifuge several times with deoxygenated deionized water until the pH value of the washing liquid is 7 to obtain a black powder, which is dried overnight at 60°C in vacuum to obtain a precursor; put the precursor into a porcelain boat and put it into a tube In the quartz tube of the type furnace, the air was removed with argon for half an hour, and then the temperature was raised to 350 ° C, and after heat treatment for two hours under the protection of argon, the core-shell structure nanoparticle catalyst of nickel borate-coated nickel boride was obtained.

[0039] The X-ray powder diffraction curve of gained catalyst is as figure 1 shown.

[0040] It can be seen from the figu...

Embodiment 2

[0051] Prepare the non-precious metal oxygen evolution catalyst basically according to the same method as Example 1, the difference is that nickel chloride is used to replace nickel acetate as nickel salt, and the catalyst obtained is composed the same as the catalyst obtained in Example 1; The overpotential corresponding to 10 milliamperes per square centimeter obtained by testing the oxygen evolution curve in 1 liter of potassium hydroxide solution is equivalent to the overpotential obtained by the catalyst obtained in Example 1.

Embodiment 3

[0053] Prepare the non-noble metal oxygen evolution catalyst basically according to the same method as Example 1, the difference is that potassium borohydride is used instead of sodium borohydride as boron source and reducing agent, and the obtained catalyst has the same composition as the catalyst obtained in Example 1; The overpotential corresponding to 10 milliamperes per square centimeter obtained by testing the oxygen evolution curve in 1 mole per liter of potassium hydroxide solution is equivalent to the overpotential obtained by the catalyst obtained in Example 1.

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Abstract

The invention provides a high-performance non-noble metal oxygen evolution catalyst and a preparation method and application thereof. The high-performance non-noble metal oxygen evolution catalyst is core-shell structural nanoparticles of nickel borate-covered nickel boride, wherein a core layer is of nickel boride nanoparticles, and a shell layer is of nickel borate. A nickel salt is reduced in alkaline solution with a borohydride to obtain a precursor, and the precursor is thermally treated to obtain the non-noble metal oxygen evolution catalyst. Application of the non-noble metal oxygen evolution catalyst as anodic oxygen evolution reaction catalyst in water electrolysis equipment is also claimed in the invention. The catalyst prepared herein has excellent catalytic performance and is higher in oxygen evolution activity than other traditional non-noble metal catalysts from literature reports. The preparation method of the invention is simple, economic, convenient to perform, and easy for large-scale production, and has huge potential application value in various industrial catalyst or other fields of science.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a high-performance non-noble metal oxygen evolution catalyst and its preparation method and application. Background technique [0002] Energy provides the material basis for various production and social activities in human society, and is an essential part of the development of human society. Most of the energy currently used by humans is non-renewable fossil energy. Compared with the long formation process of tens of millions of years, fossil energy is limited and scarce. According to reports, judging from the current consumption rate, in the next 40-60 years, all known oil and natural gas will be exploited in the world, and in the next 200 years or so, the proven coal reserves will also be exhausted. In addition, the heavy dependence on fossil energy has accelerated the deterioration of the ecological environment. Therefore, the development of clean energy has become a worldwide con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCB01J23/755B01J37/08B01J37/16C25B1/04C25B11/04Y02E60/36
Inventor 胡劲松江文杰
Owner INST OF CHEM CHINESE ACAD OF SCI
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