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Preparation method of difunctional electrocatalyst

An electrocatalyst and dual-function technology, applied in the field of electrocatalysis, can solve problems such as affecting electrocatalysis, electronic conduction resistance, and poor conductivity of electrocatalysts, and achieve the effects of promoting release, increasing specific surface area, and shortening ion diffusion distance

Inactive Publication Date: 2021-10-29
先进能源产业研究院(广州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But NiS, NiS 2 Its crystal structure is bonded with Ni-S of metal-nonmetal bond, which leads to the obstruction of internal electron conduction, poor conductivity of electrocatalyst, and affects electrocatalysis

Method used

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  • Preparation method of difunctional electrocatalyst

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Embodiment 1

[0020] The present invention will be further described in detail below in conjunction with specific examples, which are explanations of the present invention rather than limitations.

[0021] Example 1

[0022] The preparation method of described bifunctional electrocatalyst comprises the following steps:

[0023] (1) Preparation of Ni(OH) 2 Powder: First, use deionized water as the solvent, prepare 5mL of nickel chloride solution with a concentration of 0.2mol / L and 5mL of urea solution with a concentration of 2mol / L, and mix and stir the two solutions at a speed of 300r / min for 30min, then add 10mL of absolute ethanol forms a light green solution; 2mL of ammonia solution with a mass fraction of 13% is dripped dropwise into the above light green solution under the stirring condition of a rotating speed of 600r / min, and the dropping time is controlled at 10 minutes to form a blue color Then transfer the resulting dispersion to a 50ml polytetrafluoroethylene-lined autoclave, ...

Embodiment 2

[0027] The preparation method of described bifunctional electrocatalyst comprises the following steps:

[0028] (1) Preparation of Ni(OH) 2 Powder: first use deionized water as the solvent, respectively prepare 15mL of nickel chloride solution with a concentration of 0.2mol / L and 15mL of urea solution with a concentration of 2mol / L, and mix and stir the two solutions at a speed of 300r / min for 40min, then add 30mL of absolute ethanol forms a light green solution; 6mL of ammonia solution with a mass fraction of 13% is dripped dropwise into the above light green solution under the stirring condition of a rotating speed of 600r / min, and the dropping time is controlled at 15 minutes to form a blue color Then transfer the resulting dispersion to a 150ml polytetrafluoroethylene-lined autoclave, seal it and place it in an incubator at 135°C for 10 hours; finally transfer the reacted solution into two 50mL centrifuge tubes , washed with deionized water, centrifuged three times to rem...

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Abstract

The invention belongs to the technical field of electrocatalysis, and relates to a preparation method of a difunctional electrocatalyst. The preparation method comprises the following steps of: (1) preparing Ni (OH) 2 powder; and (2) preparing Ni3S2. Sulfur atoms are introduced on the basis of nickel through efficient, simple and low-cost hydrothermal and calcination, the HER activity of nickel is enhanced through electronic regulation and control, and a three-dimensional hollow structure is formed. The preparation process is simple, low in energy consumption and small in pollution; the Ni3S2 bifunctional electrocatalyst prepared by the method has good stability performance and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a preparation method of a bifunctional electrocatalyst. Background technique [0002] In recent years, with the rapid consumption of fossil energy and the increasingly serious environmental pollution caused by it, people have been exploring and researching new green energy and its transformation system, in order to achieve the harmonious coexistence of man and nature and the sustainable development of society. Therefore, various new electrochemical energy sources have been widely valued and developed, especially new-generation green energy sources such as fuel cells and metal-air batteries. However, these existing new energy cells often use noble metal catalysts, which are not only limited in terms of raw materials, And the expensive price also restrains its development speed. [0003] Electrochemical water splitting to produce hydrogen and oxygen is a resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/042C25B11/075
CPCC25B1/04C25B11/042C25B11/075Y02E60/36
Inventor 张永光王新陈忠伟
Owner 先进能源产业研究院(广州)有限公司