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Preparation method of self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material

A catalytic material and ultra-thin flower technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of harsh preparation conditions of transition metal phosphide, unsatisfactory carrier dispersion effect, and cumbersome precipitant. Addition and other issues, to achieve the effect of low cost, increase contact area, and reduce production cost

Inactive Publication Date: 2018-10-19
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem of cumbersome precipitant addition in the preparation process of electrocatalytic materials in the prior art, the preparation conditions of transition metal phosphides are harsh, high cost, high risk, serious product agglomeration, complicated preparation process and unsatisfactory carrier dispersion effect, etc. Problem, the present invention provides a preparation method of self-assembled ultra-thin flower-shaped nickel-cobalt phosphide electrocatalytic material

Method used

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  • Preparation method of self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material
  • Preparation method of self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material
  • Preparation method of self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material

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Effect test

Embodiment 1

[0045] The preparation process of a self-assembled ultra-thin flower-shaped nickel-cobalt phosphide material is as follows:

[0046] (1) To remove the oxide layer on the surface of nickel foam, first soak it in acetone for 15 minutes, then soak it in 2M dilute hydrochloric acid solution for 15 minutes, wash it with a large amount of deionized water, and dry it in vacuum;

[0047] (2) Dissolve 0.17g nickel nitrate hexahydrate and 0.34g cobalt nitrate hexahydrate in 35mL deionized water and ethanol solution (V 水 :V 乙醇 =4:3), stir well until a red transparent solution is formed;

[0048] (3) Then add 0.2g of surfactant cetyltrimethylammonium bromide to the above solution, stir to make it fully dissolve to form a red solution;

[0049] (4) Pour the solution obtained in step (3) into the inner liner of a 50mL reactor, place a piece of processed nickel foam (2×4cm 2 ), incubate at 140°C for 10h and then naturally cool to room temperature to obtain the precursor;

[0050] (5) Cro...

Embodiment 2

[0054] (1) To remove the oxide layer on the surface of nickel foam, first soak it in acetone for 15 minutes, then soak it in 2M dilute hydrochloric acid solution for 15 minutes, wash it with a large amount of deionized water, and dry it in vacuum;

[0055] (2) Dissolve 0.17g nickel nitrate hexahydrate and 0.34g cobalt nitrate hexahydrate in 35mL deionized water and ethanol solution (V 水 :V 乙醇 =4:3), stir well until a red transparent solution is formed;

[0056] (3) Then add 0.2g of surfactant cetyltrimethylammonium bromide to the above solution, stir to make it fully dissolve to form a red solution;

[0057] (4) Pour the solution obtained in step (3) into the inner liner of a 50mL reactor, place a piece of processed nickel foam (2×4cm 2 ), incubate at 100°C for 10h and then naturally cool to room temperature to obtain the precursor;

[0058] (5) Cross-wash the precursor obtained in step (4) with deionized water and absolute ethanol for 3 to 5 times, and dry the washed produ...

Embodiment 3

[0062] (1) To remove the oxide layer on the surface of nickel foam, first soak it in acetone for 15 minutes, then soak it in 2M dilute hydrochloric acid solution for 15 minutes, wash it with a large amount of deionized water, and dry it in vacuum;

[0063] (2) Dissolve 0.17g nickel nitrate hexahydrate and 0.34g cobalt nitrate hexahydrate in 35mL deionized water and ethanol solution (V 水 :V 乙醇 =4:3), stir well until a red transparent solution is formed;

[0064] (3) Then add 0.2g of surfactant cetyltrimethylammonium bromide to the above solution, stir to make it fully dissolve to form a red solution;

[0065] (4) Pour the solution obtained in step (3) into the inner liner of a 50mL reactor, place a piece of processed nickel foam (2×4cm 2 ), incubate at 200°C for 10h and then naturally cool to room temperature to obtain the precursor;

[0066] (5) Cross-wash the precursor obtained in step (4) with deionized water and absolute ethanol for 3 to 5 times, and dry the washed produ...

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Abstract

The invention discloses a preparation method of a self-assembled ultrathin flower-like nickel cobalt phosphide electrocatalytic material, which is applied to the technical field of electrocatalysis. In the preparation method provided by the invention, a low-temperature hydrothermal-phosphating method is adopted in a preparation process, no additional precipitant is added in reaction, and a nickelsalt and a cobalt salt directly react with a solvent to generate OH-ions, thereby reducing the production cost, simplifying the process and being environmentally friendly. At the same time, an electrocatalytic active substance grown in situ on foamed nickel is directly used as a working electrode, not only avoiding the use of a binder, but also greatly enhancing the electrochemical activity of theactive substance. The self-assembled ultrathin flower-like nickel cobalt phosphide prepared by the method provided by the invention shows good electrocatalytic hydrogen evolution performance in an electrochemical test. In addition, compared with the traditional preparation method, the preparation method provided by the invention has the advantages of simple operation, relatively mild synthesis conditions, energy saving, cheap materials, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of a self-assembled ultra-thin flower-shaped nickel-cobalt phosphide electrocatalytic material, in particular to the technical fields of energy and electrocatalytic materials. Background technique [0002] Energy is the foundation of social and economic development. With the growth of population and the development of economy, the imbalance between human demand and supply of energy has gradually become prominent. Due to non-renewability, the limited fossil fuels on the earth have begun to deplete, and the remaining reserves are no longer sufficient to guarantee the long-term development of human beings. On the other hand, the extensive use of fossil energy has caused many serious environmental and climate problems, such as the greenhouse effect, air pollution and climate anomalies. In view of the increasingly tense relationship between human society and energy, environment and climate, human beings urgent...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/02C25B1/04C25B11/06H01G11/24H01G11/26H01G11/30H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/86C25B1/04C25B11/04B01J27/1853B01J35/00B01J35/30Y02E60/36
Inventor 李生娟邹义成姬忠军陈乐宜朱钰方
Owner UNIV OF SHANGHAI FOR SCI & TECH
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