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Preparation method of cobalt diselenide/iron oxyhydroxide composite material with nano petal-shaped structure

A technology of iron oxyhydroxide and cobalt diselenide, applied in electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of rapid desorption of unfavorable products, limited catalytic activity, lack of sufficient room for improvement of catalytic activity, etc., and achieve high yield , enhance catalytic activity, optimize the effect of local electronic structure

Active Publication Date: 2021-04-16
ENERGY RES INST OF JIANGXI ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Transition metal selenides have strong metallic properties, and cobalt-based selenides have high intrinsic catalytic activity for OER, and are regarded as effective alternative materials for noble metal-based catalysts. However, the catalytic activity of single-component structure of cobalt selenide has been lacking at present enough room for improvement
On the other hand, the oxyhydroxide (FeOOH) of Fe, which is also a 3d transition metal, has a high TOF conversion value, but it shows a strong adsorption capacity for oxygen-containing intermediates in the OER process, which is not conducive to the rapid desorption of the product. , but limits its catalytic activity

Method used

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  • Preparation method of cobalt diselenide/iron oxyhydroxide composite material with nano petal-shaped structure
  • Preparation method of cobalt diselenide/iron oxyhydroxide composite material with nano petal-shaped structure
  • Preparation method of cobalt diselenide/iron oxyhydroxide composite material with nano petal-shaped structure

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Embodiment 1

[0061] A kind of preparation of the cobalt diselenide / iron oxyhydroxide composite material of nano petal-like structure, specifically comprises the following steps:

[0062] Preparation of S1 cobalt-containing precursor:

[0063] (1) Mix 40ml of isopropanol and 20ml of 1,3-propanediol to obtain a solvent;

[0064] (2) Add 0.22g of cobalt nitrate to the solvent in step (1), and ultrasonically disperse until the metal salt is completely dissolved to obtain a 0.02mol / L cobalt salt solution;

[0065] (3) Without adding any other organic additives, transfer the cobalt salt solution in step (1) to a 180ml hydrothermal reaction kettle, tightly seal it, transfer the hydrothermal reaction kettle to an oven, and turn on the heating. Seal and heat up to 150°C for reaction, and react for 10 hours. After the reaction, the precipitate is collected by vacuum filtration, the filter cake is repeatedly washed with methanol, and freeze-dried to obtain a cobalt-containing precursor powder, which...

Embodiment 2

[0071] A kind of preparation of the cobalt diselenide / iron oxyhydroxide composite material of nano petal-like structure, specifically comprises the following steps:

[0072] Preparation of S1 cobalt-containing precursor:

[0073] (1) Mix 1,3-propanediol with 160ml of isopropanol and 20ml to obtain a solvent;

[0074] (2) Take 5.12g of cobalt acetylacetonate and add it to the solvent in step (1), and ultrasonically disperse until the metal salt is completely dissolved to obtain a 0.08mol / L cobalt salt solution;

[0075] (3) Without adding any other organic additives, transfer the cobalt salt solution in step (1) to a 450ml hydrothermal reaction kettle, seal it tightly, transfer the hydrothermal reaction kettle to an oven, and turn on the heating. Seal and heat up to 180°C for reaction, and react for 15 hours. After the reaction, the precipitate is collected by vacuum filtration, the filter cake is repeatedly washed with ethanol, and vacuum-dried at 80°C to obtain a cobalt-cont...

Embodiment 3

[0081] A kind of preparation of the cobalt diselenide / iron oxyhydroxide composite material of nano petal-like structure, specifically comprises the following steps:

[0082] Preparation of S1 cobalt-containing precursor:

[0083] (1) Mix 80ml of isopropanol and 20ml of 1,3-propanediol to obtain a solvent;

[0084] (2) Get 0.7g cobalt acetate and add the solvent in step (1), and ultrasonically disperse until the metal salt is completely dissolved to obtain a 0.04mol / L cobalt salt solution;

[0085] (3) In the case of not adding any other organic additives, the cobalt salt solution in step (1) is transferred to a 270ml polytetrafluoroethylene-lined hydrothermal reaction kettle, strictly sealed, and the hydrothermal reaction kettle is transferred to In the oven, turn on the heating, seal and heat up to 160°C for reaction, and react for 12 hours. After the reaction, the precipitate is collected by filtration under reduced pressure, the filter cake is washed repeatedly with washin...

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Abstract

The invention discloses a preparation method of a cobalt diselenide / iron oxyhydroxide composite material with a nano petal-shaped structure, and belongs to the field of new-generation energy storage and catalysis. The cobalt diselenide / iron oxyhydroxide composite material with the nano petal-shaped structure is prepared through preparation of a cobalt-containing precursor, namely a one-step solvothermal method, preparation of cobalt diselenide, namely a chemical vapor deposition method, and preparation of a cobalt diselenide / iron oxyhydroxide heterojunction interface composite material, namely a water bath deposition method. Compared with the prior art, the cobalt diselenide and iron oxyhydroxide interface composite material with the petal-shaped geometric structure prepared by the invention shows excellent electrocatalytic activity and good stability in the process of driving the anode end catalysis of electrolyzed water, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of new generation energy storage and catalysis, and specifically relates to a method for preparing a cobalt diselenide / iron oxyhydroxide composite material with a nano-petal structure. Background technique [0002] Hydrogen is considered to be the most promising energy carrier for the next generation. However, it rarely exists in the form of free molecules on earth, so artificial technology is required to efficiently produce hydrogen. Oxygen evolution reaction (OER) at the anode end of electrolyzed water has become a bottleneck in the application of electrolyzed water for hydrogen production due to factors such as multiple electron transfer steps, high theoretical potential, and slow kinetics. However, the introduction of catalysts can effectively reduce the reaction potential of OER barrier and accelerate its reaction kinetics. Therefore, the development of high-efficiency anode catalysts for water electro...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCY02E60/36
Inventor 黎建刚席细平罗成龙范敏李琴詹聪
Owner ENERGY RES INST OF JIANGXI ACAD OF SCI
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