Self-support transition metal selenide catalyst as well as preparation method and application thereof

A technology of transition metals and transition metal elements, applied in the field of self-supporting transition metal selenide catalysts and their preparation, can solve the problems of low catalytic activity and limited pH value

Inactive Publication Date: 2015-09-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a self-supporting transition metal selenide catalyst and its preparation method and application in order to solve the technical problem of low catalytic activity of existing catalysts or limited by pH value

Method used

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  • Self-support transition metal selenide catalyst as well as preparation method and application thereof
  • Self-support transition metal selenide catalyst as well as preparation method and application thereof
  • Self-support transition metal selenide catalyst as well as preparation method and application thereof

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preparation example Construction

[0028] The invention provides a preparation method of a self-supporting transition metal selenide catalyst, the method comprising:

[0029] Step 1: dissolving selenium powder in aqueous solution of sodium borohydride, or adding metal salts of transition metal elements to obtain a mixed solution;

[0030] Step 2: adding the transition metal conductive substrate to the mixed solution obtained in Step 1 for reaction to obtain a self-supporting transition metal selenide catalyst.

[0031] According to the present invention, the selenium powder is first dissolved in the sodium borohydride aqueous solution to obtain the sodium selenium hydride solution, preferably added under the condition of magnetic stirring, and the mass ratio of the described selenium powder and sodium borohydride is preferably (0.01~0.1 ): (0.02~0.1); or adding a metal salt of a transition metal element to obtain a mixed solution; the molar ratio of the selenium powder to the metal salt of a transition metal el...

Embodiment 1

[0042] Weigh 0.059 grams of selenium powder and dissolve it in 1.5 milliliters of distilled water containing 0.065 grams of sodium borohydride with magnetic stirring to prepare a sodium selenium hydride solution, transfer the solution to a 50 milliliter reaction axe, and add 1 × 3 cm of washing Put the reaction ax into a 140°C oven to react for 12 hours, wash the product with distilled water and ethanol and put it in a 60°C oven to dry to obtain a nickel mesh with nickel selenide nanowire arrays.

[0043] figure 1 It is the X-ray diffraction pattern of the nickel mesh with the nickel selenide nanowire array obtained in Example 1, which shows that the final product is nickel selenide. figure 2 It is the scanning electron micrograph of the nickel mesh with the nickel selenide nanowire array obtained in Example 1, wherein figure a is a scanning electron micrograph under a 50 μm scale, and figure b is a scanning electron micrograph under a 500nm scale, figure 2 It shows that th...

Embodiment 2

[0045] Weigh 0.059 grams of selenium powder and dissolve it in 1.5 milliliters of distilled water containing 0.065 grams of sodium borohydride with magnetic stirring to prepare a sodium selenium hydride solution, transfer the solution to a 50 milliliter reaction axe, and add 1 × 3 cm of washing Put the reaction ax into a 140°C oven to react for 12 hours, wash the product with distilled water and ethanol and put it into a 60°C oven to dry to obtain a nickel foil with nickel selenide nanowire arrays.

[0046] Figure 5 It is the scanning electron micrograph of the nickel foil with the nickel selenide nanowire array obtained in Example 2, wherein figure a is a scanning electron micrograph under a 5 μm scale, and figure b is a scanning electron micrograph under a 500nm scale, Figure 5 It shows that the nickel foil with nickel selenide nanowire arrays obtained in Example 2 has a diameter of 20-80 nanometers and a length of 1-6 microns. The nickel selenide nanowire array catalyst ...

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Abstract

The invention provides a self-support transition metal selenide catalyst as well as a preparation method and application thereof, belongs to the field of alkaline full electrolytic tank water decomposition, and solves the technical problems that the existing catalyst is low in catalytic activity or the catalyst activity is limited by pH value. The preparation method of the self-support transition metal selenide catalyst comprises the following steps: dissolving selenium powder in a sodium borohydride aqueous solution, or adding metal salt of a transition metal element to obtain a mixed solution; then, adding a conductive substrate of the transition metal into the obtained mixed solution for reaction to obtain the self-support transition metal selenide catalyst; or preparing transition metal selenide electrolyte from the metal salt of the transition metal element, selenium dioxide and lithium chloride; then adopting the conductive substrate of the transition metal as a working electrode for carrying out electrodeposition in the obtained transition metal selenide to obtain the self-support transition metal selenide catalyst. According to the invention, the preparation method is free of pH influence, and the prepared selenide catalyst has excellent electro-catalysis hydrogen evolution and oxygen evolution performance when applied in a battery.

Description

technical field [0001] The invention relates to the field of water decomposition in an alkaline full electrolytic cell, in particular to a self-supporting transition metal selenide catalyst and its preparation method and application. Background technique [0002] In the 21st century, energy crisis and environmental pollution have become two very serious problems facing the world. Therefore, in order to realize the sustainable development of human beings, it is extremely urgent to develop clean and renewable energy. Hydrogen is a high combustion value, high efficiency and clean energy. However, the current production of hydrogen energy is mainly obtained by reforming coal and natural gas, which will inevitably increase the consumption of non-renewable energy and bring about environmental pollution problems. Hydrogen production by electrolysis of water is an important means to achieve industrialization and low-cost production of hydrogen. The use of solar energy for photoly...

Claims

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Application Information

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IPC IPC(8): B01J27/057H01M4/90C25B1/04
CPCY02E60/36Y02E60/50
Inventor 孙旭平邢志财
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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