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Carbon-coated nickel cobalt selenide nano material with excellent water electrolysis performance and preparation method of carbon-coated nickel cobalt selenide nano material

A nanomaterial and carbon-coated technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of limited reserves, large-scale promotion and application, restrictions on large-scale commercial applications, high Overpotential and other issues, to achieve excellent catalytic activity, cheap raw materials, good stability

Inactive Publication Date: 2018-09-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the water splitting process is a non-spontaneous reaction, including oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), which require a very high overpotential, the practical application of water electrolysis has great limitations.
Currently, noble metal oxides such as RuO 2 and IrO 2 , is the most effective OER electrocatalyst, but its high price, limited reserves and other shortcomings seriously limit its large-scale application. Similarly, noble metals such as Pt, Pd, and Rh have high electrocatalytic activity in the hydrogen evolution electrocatalytic reaction, but Its high cost and limited resources greatly limit its large-scale commercial application

Method used

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  • Carbon-coated nickel cobalt selenide nano material with excellent water electrolysis performance and preparation method of carbon-coated nickel cobalt selenide nano material
  • Carbon-coated nickel cobalt selenide nano material with excellent water electrolysis performance and preparation method of carbon-coated nickel cobalt selenide nano material
  • Carbon-coated nickel cobalt selenide nano material with excellent water electrolysis performance and preparation method of carbon-coated nickel cobalt selenide nano material

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Embodiment 1

[0022] A carbon-coated nickel-cobalt selenide (Ni 0.67 co 0.33 Se 2 ) The preparation method of nanometer material comprises the following steps:

[0023] (1) 0.1746 g of Co(NO 3 ) 2 ·6H 2 O and 0.3489 g Ni(NO 3 ) 2 ·6H 2 O was added to a mixed solution of 9.375 milliliters of N,N-dimethylformamide (DMF) and 5.625 milliliters of ethanol, and then 0.36 grams of polyvinylpyrrolidone (PVP-K30) and 0.1995 grams of terephthalic acid were added, stirred and dissolved until Homogenize the solution, transfer the mixed solution to a hydrothermal kettle, and keep it at 120 degrees Celsius for 24 hours to synthesize the Co-Ni-MOFs material, take it out and cool it at room temperature.

[0024] (2) The Co-Ni-MOFs material obtained in step (1) was washed twice with deionized water and ethanol respectively, dried in vacuum at 80 degrees Celsius for 2 hours, cooled and ground into powder for later use.

[0025] (3) Weigh 0.1 g of the powder obtained in step (2) and 0.5 g of selenium...

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Abstract

The invention provides a carbon-coated nickel cobalt selenide (Ni0.67Co0.33Se2) nano material with excellent water electrolysis performance and a preparation method of the carbon-coated nickel cobaltselenide (Ni0.67Co0.33Se2) nano material. The method comprises the following steps: dissolving Co(NO3)2.6H2O, Ni(NO3)2.6H2O, polyvinylpyrrolidone (PVP-K30) and terephthalic acid in a mixed solution ofN,N-dimethylformamide (DMF) and ethanol at first; then transferring the solution into an autoclave with a polytetrafluoroethylene liner; after a Co-Ni-MOFs material is synthesized by high-temperaturereaction, washing, drying and grinding the Co-Ni-MOFs material, mixing the Co-Ni-MOFs material with selenium powder and then placing the mixture in a tube furnace; and carrying out high-temperature annealing treatment in a nitrogen atmosphere to obtain the carbon-coated nickel cobalt selenide (Ni0.67Co0.33Se2) nano material. The obtained carbon-coated Ni0.67Co0.33Se2 nano material has excellent characteristics of high preparation speed, high yield, good stability and the like, and has high application value in the aspect of water electrolysis catalysis under the alkaline condition.

Description

technical field [0001] The present invention relates to a carbon-coated nickel-cobalt selenide (Ni 0.67 co 0.33 Se 2 ) Nanomaterials and their preparation methods. Background technique [0002] With the reduction of fossil fuels and the intensification of environmental pollution, the development of future society will have to rely on sustainable renewable energy. The method of electrolyzing water to produce clean hydrogen fuel is generally regarded as a promising sustainable solution. However, because water splitting processes are non-spontaneous reactions, including oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), which require a very high overpotential, the practical application of water electrolysis has great limitations. Currently, noble metal oxides such as RuO 2 and IrO 2 , is the most effective OER electrocatalyst, but its high price, limited reserves and other shortcomings seriously limit its large-scale application. Similarly, noble metal...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04C01B19/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B19/002C25B1/04C25B11/04Y02E60/36
Inventor 陈志明张海静杨晓冬徐波李村成
Owner UNIV OF JINAN
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