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A kind of hydrogen evolution electrocatalyst and its preparation method and application

An electrocatalyst and hydrogen evolution technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problems of poor cycle stability and easy corrosion, and achieve the effects of low cost, simple preparation method and wide source.

Active Publication Date: 2021-02-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, research on non-Pt-based hydrogen evolution catalysts mainly focuses on transition metal phosphides, borides, oxides, and sulfides, but these catalysts are susceptible to corrosion in acidic media, resulting in poor cycle stability.

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  • A kind of hydrogen evolution electrocatalyst and its preparation method and application
  • A kind of hydrogen evolution electrocatalyst and its preparation method and application
  • A kind of hydrogen evolution electrocatalyst and its preparation method and application

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preparation example Construction

[0032] The invention provides a method for preparing a hydrogen evolution electrocatalyst, comprising the following steps:

[0033] Grinding the nickel ore to obtain nickel ore powder;

[0034] Mixing the nickel ore powder, associated ore inhibitor, foaming agent, flotation agent and water for flotation to obtain pentlandite;

[0035] The pentlandite, inorganic base and water are mixed, and a thermal alkali reaction is carried out to obtain the hydrogen evolution electrocatalyst.

[0036] The invention grinds nickel ore to obtain nickel ore powder.

[0037] In the present invention, the composition of the nickel ore preferably includes pentlandite and pyrrhotite; the present invention does not specifically limit the source of the nickel ore, and adopts the pentlandite ore well-known to those skilled in the art. and the nickel ore of pyrrhotite; in a specific embodiment of the present invention, the nickel ore is preferably from the nickel ore of Hongqiling, Jilin Province, a...

Embodiment 1

[0080] Use a crusher to crush the nickel ore into nickel ore particles with a particle size of about 10 μm; then use a planetary ball mill to grind the nickel ore particles at a speed of 300 rpm for 10 hours, and then use a high-energy ball mill to grind at a speed of 900 rpm for 30 minutes to obtain nickel ore particles with a particle size of 300-800 nm. nickel ore powder;

[0081] Get nickel ore powder 5g, wherein add 80mL of deionized water, form nickel ore powder aqueous solution; With 0.1g sodium carboxymethylcellulose, 0.2g anhydrous sodium carbonate, 0.15g sodium metabisulfite and 0.5mL diethylenetriamine ( Associated ore inhibitor) was added to 80mL of nickel ore powder aqueous solution, ultrasonically dispersed for 3min, then 1mL of methyl isobutyl carbinol (foaming agent) and 2g of butyl xanthate (flotation agent) were added, and ultrasonically dispersed for 3min to obtain Flotation solution, now the pH value of the flotation solution is approximately 13, and the fl...

Embodiment 2

[0090] Use a crusher to crush the nickel ore into nickel ore particles with a particle size of about 10 μm; then use a planetary ball mill to grind the nickel ore particles at a speed of 300 rpm for 10 hours, and then use a high-energy ball mill to grind at a speed of 900 rpm for 40 minutes to obtain nickel ore particles with a particle size of 400-600 nm. nickel ore powder;

[0091] Get nickel ore powder 5g, wherein add 80mL of deionized water, form nickel ore powder aqueous solution; With 0.1g sodium carboxymethylcellulose, 0.15g anhydrous sodium carbonate, 0.15g sodium metabisulfite and 0.6mL diethylenetriamine ( Associated ore inhibitor) was added to 80mL nickel ore powder aqueous solution, ultrasonically dispersed for 3min, then 1mL methyl isobutyl carbinol (foaming agent) and 3g isobutyl xanthate (flotation agent) were added, and ultrasonically dispersed for 3min, Obtain the flotation solution, and now the pH value of the flotation solution is approximately 12, and after...

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Abstract

The invention provides a hydrogen evolution electrocatalyst and its preparation method and application, belonging to the technical field of catalysts. The invention uses nickel ore as a raw material to obtain a hydrogen evolution electrocatalyst through flotation and hot alkali reaction. The preparation method of the invention uses nickel ore as a raw material, has wide sources of raw materials, does not involve precious metals, and has low cost; the preparation method is simple and easy for industrialized mass production. Moreover, the obtained hydrogen evolution electrocatalyst has excellent hydrogen evolution performance and good cycle stability, and is very suitable for industrial electrolysis of water to produce hydrogen. The data of embodiment shows: the hydrogen evolution electrocatalyst provided by the present invention is in -10mA·cm ‑2 The overpotential at the current density is only -48mV; after 10,000 cycles of cyclic voltammetry, the hydrogen evolution overpotential of the hydrogen evolution electrocatalyst provided by the present invention becomes -59mV.

Description

technical field [0001] The invention relates to the technical field of catalyst materials, in particular to a hydrogen evolution electrocatalyst and its preparation method and application. Background technique [0002] The two major challenges facing mankind in the 21st century are energy crisis and environmental pollution. At present, hydrogen energy has become the most promising renewable energy due to its highest energy density and clean and pollution-free characteristics among conventional energy sources. [0003] The hydrogen evolution reaction is the cathodic half-reaction for total water splitting. The electrolyte used in the hydrogen evolution reaction can be acidic, neutral and alkaline electrolytes. The hydrogen evolution reaction in acidic electrolytes has a lower reaction barrier because it does not need to go through the water decomposition step. At present, the hydrogen evolution reaction consumes a large amount of electric energy, so from the perspective of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043C25B1/04C25B11/075
CPCB01J27/043C25B1/04C25B11/073B01J35/33Y02E60/36
Inventor 田宏伟吴一县郑伟涛
Owner JILIN UNIV
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