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A kind of preparation method of ultrathin coni alloy nano sheet

A kind of alloy nano and ultra-thin technology, which is applied in nano technology, metal processing equipment, transportation and packaging, etc., can solve the problems of complex preparation methods, and achieve the effect of simple operation, good oxygen evolution electrocatalytic activity, and good uniformity

Active Publication Date: 2019-06-25
SHAANXI NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cobalt-nickel alloy is a typical magnetic alloy. Cobalt-nickel alloy material has good corrosion resistance and thermal stability. Compared with simple cobalt and nickel, cobalt-nickel alloy shows better performance in many cases. Magnetic materials, fuel cells, electronic and optoelectronic devices, bioengineering materials and other fields have broad application prospects, but at present, cobalt-nickel alloys are mainly prepared by adding surfactants or microwave methods to obtain different shapes, and the preparation methods are relatively complicated.

Method used

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  • A kind of preparation method of ultrathin coni alloy nano sheet
  • A kind of preparation method of ultrathin coni alloy nano sheet
  • A kind of preparation method of ultrathin coni alloy nano sheet

Examples

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Effect test

Embodiment 1

[0022] Add 0.5mL of 2.0mol / L cobalt chloride aqueous solution and 0.5mL of 1.0mol / L potassium tetracyannickelate aqueous solution into a 5mL beaker, mix well, and stand at 40°C for 8 hours to obtain cobalt-nickel cyanide gel, and then Add 50 mL of 3.0 mol / L sodium borohydride aqueous solution under stirring conditions, wherein the molar ratio of potassium tetracyanonickelate to cobalt chloride and sodium borohydride is 1:2:300, reduce the reaction at 70°C for 6 hours, and cool to normal temperature, centrifuged, washed with deionized water, and dried at 60°C in a vacuum oven to obtain ultrathin CoNi alloy nanosheets (see Figure 1~4 ).

Embodiment 2

[0024] Add 0.5mL of 1.5mol / L cobalt chloride aqueous solution and 0.5mL of 1.0mol / L potassium tetracyannickelate aqueous solution into a 5mL beaker, mix well, and stand at 40°C for 8 hours to obtain cobalt-nickel cyanide gel, and then Add 36 mL of 3.5 mol / L sodium borohydride aqueous solution under stirring conditions, wherein the molar ratio of potassium tetracyanonickelate to cobalt chloride and sodium borohydride is 1:1.5:250, reduce the reaction at 70°C for 6 hours, and cool to At room temperature, centrifuged, washed with deionized water, and dried in a vacuum oven at 60°C to obtain ultrathin CoNi alloy nanosheets (see Figure 5 ).

Embodiment 3

[0026] Add 1mL of 2.0mol / L cobalt chloride aqueous solution and 1mL of 1.0mol / L potassium tetracyannickelate aqueous solution into a 5mL beaker, mix well, and let stand at room temperature for 12 hours to obtain cobalt nickel cyanide gel, and then Add 100mL of 3.0mol / L sodium borohydride aqueous solution, wherein the molar ratio of potassium tetracyanonickelate to cobalt chloride and sodium borohydride is 1:2:300, reduce reaction at room temperature for 24 hours, centrifuge, use Washed with ionized water and dried at 60°C in a vacuum oven to obtain ultra-thin CoNi alloy nanosheets (see Figure 6 ).

[0027] The inventor uses the ultra-thin CoNi alloy nanosheets obtained in Example 1 to electrocatalyze oxygen evolution. The specific method is: add 2 mg of ultra-thin CoNi alloy nanosheets to 1 mL of aqueous solution, mix well, take 4 μL of the resulting mixed solution and drop it on the platinum carbon electrode above, to be used for electrochemical test after drying, test resu...

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Abstract

The invention discloses a method for preparing ultra-thin CoNi alloy nanosheets. In the method, cobalt-nickel cyanide gel is first prepared with cobalt chloride and potassium tetracyannickelate as precursors, and then sodium borohydride is used as a reducing agent. The cobalt-nickel cyanide gel can be reduced into ultra-thin CoNi alloy nanosheets with regular shape and uniform size by medium heating method. The preparation method of the present invention is simple and economical, suitable for large-scale industrial production, and the obtained ultra-thin CoNi alloy nanosheets have good stability and water solubility, and have good OER catalytic activity and stability in alkaline potassium hydroxide solution, It has a good application prospect in electrochemistry.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a method for preparing ultrathin CoNi alloy nanosheets. As a catalyst, the CoNi alloy nanosheets exhibit high catalytic activity and stability for oxygen evolution reaction under alkaline conditions. Background technique [0002] In recent years, due to the scarcity and high price of precious metal resources, more and more people have begun to study non-precious metal substances, especially non-precious metal alloys. Magnetic metals (such as cobalt, nickel) and their alloys have attracted much attention because of their high strength, corrosion resistance, high hardness, strong magnetism, and high catalytic performance. The study found that the catalytic performance of the special morphology structure is far superior to that of ordinary spherical particles. Cobalt-nickel alloy is a typical magnetic alloy. Cobalt-nickel alloy material has good corrosion r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0551B22F1/054
Inventor 陈煜李颖李淑妮
Owner SHAANXI NORMAL UNIV
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