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Preparation method of Co3O4 hierarchical-nano structure doped with different anions

A technology of tricobalt tetroxide and nanostructure, which is applied in the field of catalysis, can solve the problems of active site exposure and poor conductivity, and achieve the effects of simple equipment, improvement of poor conductivity, and easy control

Inactive Publication Date: 2020-03-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For Co 3 o 4 To solve the problems of poor conductivity and low exposure of active sites, the present invention proposes a method for preparing a multi-level nanoarray structure of cobalt tetraoxide grown on the surface of nickel foam and doped with different anions

Method used

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  • Preparation method of Co3O4 hierarchical-nano structure doped with different anions
  • Preparation method of Co3O4 hierarchical-nano structure doped with different anions
  • Preparation method of Co3O4 hierarchical-nano structure doped with different anions

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Embodiment 1

[0035] (1) Preparation of multi-level array structure of cobalt-based precursor: use nickel foam (2cm×5cm×1.0mm) as the substrate, soak in 5% hydrochloric acid for 20min to remove the oxide layer on the surface, and then use acetone and ethanol and deionized water (DI) in turn, and dried naturally for later use. Weigh 1.5g of cobalt nitrate hexahydrate, 1.0g of urea, and 0.3g of ammonium fluoride, disperse them in deionized water, transfer them to a 100ml reactor, and perform ultrasonic dispersion treatment. Below the surface, make it fully contact with the reaction solution. After the shell is sealed, transfer it to an oven, keep the temperature at 100°C, keep it for 6 hours, and cool down naturally. The nickel foam with cobalt-based precursor grown on the surface is taken out from the inner lining of the reactor, rinsed repeatedly with deionized water and ethanol, transferred to a vacuum oven for drying at 60°C, and the multi-level cobalt-based precursor grown on the surface...

Embodiment 2

[0039] (1) Preparation of multi-level array structure of cobalt-based precursor: use nickel foam (2cm×5cm×1.5mm) as the substrate, soak in 5% hydrochloric acid for 20min to remove the oxide layer on the surface, and then use acetone and ethanol and deionized water (DI) in turn, and dried naturally for later use. Weigh 2.0g of cobalt nitrate hexahydrate, 2.0g of urea, and 0.4g of ammonium fluoride, disperse them in deionized water, transfer them to a 100ml reactor, and perform ultrasonic dispersion treatment, then transfer the processed nickel foam to the reactor, immerse in the liquid Below the surface, make it fully contact with the reaction solution. After the shell is sealed, transfer it to a vacuum oven, keep the temperature at 120 ° C, keep it for 8 hours, and cool down naturally. The nickel foam with cobalt-based precursor grown on the surface is taken out from the inner lining of the reactor, rinsed repeatedly with deionized water and ethanol, transferred to a vacuum ov...

Embodiment 3

[0043] (1) Preparation of cobalt-based precursor multi-level array structure: use nickel foam (2cm×5cm×1.7mm) as the substrate, soak in 5% hydrochloric acid for 20min to remove the oxide layer on the surface, and then use acetone, ethanol and deionized water (DI) in turn, and dried naturally for later use. Weigh 2.5g of cobalt nitrate hexahydrate, 1.5g of urea, and 0.6g of ammonium fluoride, disperse them in deionized water, transfer them to a 100ml reactor, and perform ultrasonic dispersion treatment, then transfer the processed nickel foam to the reactor, immerse in the liquid Below the surface, make it fully contact with the reaction solution. After the shell is packaged, transfer it to an oven, keep the temperature at 150°C, keep it for 10h, and cool down naturally. The nickel foam with cobalt-based precursor grown on the surface is taken out from the inner lining of the reactor, rinsed repeatedly with deionized water and ethanol, transferred to a vacuum oven for drying at...

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Abstract

The invention provides a preparation method of a Co3O4 hierarchical-nano structure doped with different anions. Through a one-step hydrothermal process, a hierarchical array structure of growing nanowires on the surface of nanosheets is obtained, wherein the hierarchical-nano structure is beneficial to fully exposure of active surface area of a catalytic material and fully contact with an electrolyte; through different thermal treatment modes, Co3O4 hierarchical array structures doped with N, P and S atoms are respectively prepared, so that problems of poor electro-conductivity and low exposure of active sites of intrinsic Co3O4. The preparation method is simple in equipment and is easy to control, has good process repeatability, is stable in product quality, and has extensive applicationprospect.

Description

technical field [0001] The invention belongs to the field of catalysis, and relates to a method for preparing a multilevel nano-array structure of tricobalt tetroxide doped with different anions and loaded on the surface of a nickel foam substrate. Background technique [0002] In the face of increasingly severe environmental problems and the accelerated consumption of fossil fuels, the development and storage of new energy has become an urgent need. Therefore, finding a new energy source that is clean, renewable, safe, efficient, and environmentally friendly is of great significance to the future development of human society. As a new energy source, hydrogen energy has the advantages of cleanness, high combustion heat, storability, cheapness and availability, etc., so it is recognized as one of the most ideal and potential energy sources to replace fossil fuels. Hydrogen energy production by electrolysis of water is currently one of the most promising and cleanest ways to ...

Claims

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Application Information

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IPC IPC(8): B01J27/02B01J27/185B01J27/24B01J37/10C25B1/04C25B11/06
CPCB01J27/02B01J27/24B01J27/1853B01J37/10C25B1/04C25B11/04B01J35/33Y02E60/36
Inventor 郑金龙吕超杰吴凯利
Owner UNIV OF SCI & TECH BEIJING
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