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Layered metal hydroxide with nanometer box structure as well as preparation method and application of layered metal hydroxide

A layered metal and hydroxide technology, applied in the field of electrocatalysis, can solve problems such as high temperature, high preparation cost, and complicated preparation methods, and achieve the effects of improved catalytic activity, large specific surface area, and easy control of conditions

Pending Publication Date: 2022-05-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are few reports on layered metal hydroxides with three-dimensional structure and doped with one or more metals, and the synthesis requires high temperature and complicated preparation methods, resulting in high preparation costs. Therefore, it is still a challenge to prepare and develop a low-cost, high-performance, three-dimensional layered metal hydroxide preparation method.

Method used

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  • Layered metal hydroxide with nanometer box structure as well as preparation method and application of layered metal hydroxide
  • Layered metal hydroxide with nanometer box structure as well as preparation method and application of layered metal hydroxide
  • Layered metal hydroxide with nanometer box structure as well as preparation method and application of layered metal hydroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Dissolve 6 mg of cetyl trimethyl ammonium bromide and 240 mg of cobalt nitrate in 8 mL of deionized water with stirring until the solution is clear and transparent;

[0047] 2. Dissolve 3.5g of dimethylimidazole in 56mL of water with stirring until the solution is clear and transparent;

[0048] 3. Add the solution obtained in step 1 to the solution obtained in step 2, and stir at room temperature for 20 min;

[0049] 4. Centrifuge the solution obtained in step 3, and after centrifugation, the obtained solid precipitate is washed with ethanol for 3 times and then dissolved in 120 mL of ethanol solution for subsequent use;

[0050] 5. Dissolve 200 mg of cobalt nitrate in water with stirring;

[0051] 6. Pour the solutions obtained in steps 4 and 5 into a round-bottomed flask, mix well, hydrothermally react at 80°C for 2 hours, and then centrifuge to separate solid-liquid;

[0052] 7. The solid obtained by centrifugation in step 6 was washed three times with water and ...

Embodiment 2

[0055] 1. Dissolve 6 mg of cetyl trimethyl ammonium bromide and 240 mg of cobalt nitrate in 8 mL of deionized water with stirring until the solution is clear and transparent;

[0056] 2. Dissolve 3.5g of dimethylimidazole in 56mL of water with stirring until the solution is clear and transparent;

[0057] 3. Add the solution obtained in step 1 to the solution obtained in step 2, and stir at room temperature for 20 min;

[0058] 4. Centrifuge the solution obtained in step 3, and after centrifugation, the obtained solid precipitate is washed with ethanol for 3 times and then dissolved in 120 mL of ethanol solution for subsequent use;

[0059] 5. Dissolve 100 mg of molybdate in water with stirring;

[0060] 6. Pour the solutions obtained in steps 4 and 5 into a round-bottomed flask, mix well, hydrothermally react at 80°C for 2 hours, and then centrifuge to separate solid-liquid;

[0061] 7. The solid obtained by centrifugation in step 6 was washed three times with water and eth...

Embodiment 3

[0065] 1. Dissolve 6 mg of cetyl trimethyl ammonium bromide and 240 mg of cobalt nitrate in 8 mL of deionized water with stirring until the solution is clear and transparent;

[0066] 2. Dissolve 3.5g of dimethylimidazole in 56mL of water with stirring until the solution is clear and transparent;

[0067] 3. Add the solution obtained in step 1 to the solution obtained in step 2, and stir at room temperature for 20 min;

[0068] 4. Centrifuge the solution obtained in step 3, and after centrifugation, the obtained solid precipitate is washed with ethanol for 3 times and then dissolved in 120 mL of ethanol solution for subsequent use;

[0069] 5. Dissolve 400 mg of molybdate in water with stirring;

[0070] 6. Pour the solutions obtained in steps 4 and 5 into a round-bottomed flask, mix well, hydrothermally react at 80°C for 2 hours, and then centrifuge to separate solid-liquid;

[0071] 7. The solid obtained by centrifugation in step 6 was washed three times with water and eth...

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Abstract

The invention discloses a preparation method of a layered metal hydroxide with a nano box structure and application of the layered metal hydroxide in an electro-catalytic water decomposition oxygen evolution reaction. According to the method, a metal organic framework (MOF) nano block is used as a sacrificial template and a raw material, and the MOF nano block reacts with metal cation salt in a hydrothermal process to generate the layered metal hydroxide with a hollow structure in situ. The material prepared by the method is of a three-dimensional nano-box structure enclosed by two-dimensional nanosheets, is large in specific surface area and uniform in size distribution, and has the advantages that the operation is simple, and metal elements can be flexibly regulated and controlled. The material shows excellent activity and wide application prospect as an electrode material for electro-catalysis and electro-catalysis water decomposition.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular, to a nano-box structure layered metal hydroxide and a preparation method and application thereof. Background technique [0002] The effective utilization of green energy such as solar energy and wind energy is an important topic in current energy research. Water electrolysis is seen as an innovative means of efficiently storing these intermittent sources of energy, as its cathode product hydrogen is considered an ideal energy carrier. However, the current bottleneck limiting the efficiency of water electrolysis still lies in the oxygen evolution reaction (OER) of its anode. Since the reaction involves multi-step four-electron transfer, high overpotential is often required to overcome its reaction energy barrier and slow reaction kinetics. Ir- and Ru-based catalysts are the most efficient catalysts developed, but the high cost of these noble metal-based catalysts largely ...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10C25B1/04C25B11/095
CPCB01J31/1691B01J31/1815C25B1/04B01J2531/845B01J35/33B01J35/61
Inventor 邓德会杨雁贾柔娜唐雷
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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