Difunctional electrocatalyst with heterostructure nickel cobalt nitride nanosheet array and preparation and application of difunctional electrocatalyst

A nanosheet array, heterostructure technology, applied in nanotechnology, electrodes, electrolysis process, etc., to achieve the effect of improving catalytic activity, promoting charge transfer, and fast charge transfer

Pending Publication Date: 2022-04-15
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AI-Extracted Technical Summary

Problems solved by technology

However, electrochemical ethylene glycol oxidation is still limited to noble metal-based catalysts such as palladium, platinum, gold and their alloys
The development of highly activ...
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Method used

Among Fig. 4-3, a figure is that Co-Ni3N/CC catalyst collects the proton nuclear magnetic spectrum of product after electrolyzing ethylene glycol for a long time, and yellow, blue, green shadow represent ethylene glycol, internal standard and formaldehyde respectively The positions of the characteristic peaks of the H NMR spectra of acid salts. It can be seen that after a long period of electrolysis, the peak of ethylene glycol disappeared, and a strong formate peak appeared at 8.27ppm, indicating that ethylene glycol was effectively converted into formate. Figure b is a comparison of the OER and EGOR LSV of nickel-cobalt nitride heterojunction and nickel nitride. It can be seen that the introduction of cobalt can reduce the onset potential of Ni2+/Ni3+ pair, so the heterojunction catalyst has a lower Ethylene glycol oxidation onset potential.
[0070] Polyethylene terephthalate (PET) can be hydrolyzed in an alkaline solution to obtain monomers such as terephthalic acid (PTA) and ethylene glycol (EG). The conversion of ethylene glycol components in PET plastics into high-value-added formate by electrocatalysis is environmentally ...
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The preparation method comprises the following steps: (1) dissolving a soluble nickel salt, a soluble cobalt salt, urea and ammonium fluoride in deionized water to form a uniform solution, transferring the uniform solution into a reaction kettle containing carbon cloth, carrying out a hydrothermal reaction, washing the reaction kettle with water, and drying the reaction kettle to obtain a nickel-cobalt nitride nanosheet array; a nickel-cobalt bimetallic precursor loaded on the carbon cloth is obtained; and (2) placing the nickel-cobalt bimetallic precursor loaded on the carbon cloth in an ammonia atmosphere for high-temperature nitridation to obtain a target product, namely the difunctional electrocatalyst. Based on an in-situ growth strategy and an array structure of the heterojunction nanosheets, rapid electron transfer is facilitated, more active sites are exposed, electron interaction of a heterojunction interface and a synergistic effect of different components are facilitated, and therefore the catalytic activity of the material is facilitated.

Application Domain

Electrolytic organic productionNanotechnology +1

Technology Topic

Nickel saltThermal reaction +9


  • Difunctional electrocatalyst with heterostructure nickel cobalt nitride nanosheet array and preparation and application of difunctional electrocatalyst
  • Difunctional electrocatalyst with heterostructure nickel cobalt nitride nanosheet array and preparation and application of difunctional electrocatalyst
  • Difunctional electrocatalyst with heterostructure nickel cobalt nitride nanosheet array and preparation and application of difunctional electrocatalyst


  • Experimental program(2)
  • Effect test(1)

Example Embodiment

[0046] Example 1:
[0047] Preparation of precursor nickel cobalt oxide, nickel hydroxide, cobalt hydroxide:
[0048] It is weighed 0.476 g of hexahydride, 0.476 g of cobalt chloride and 0.296 g of ammonium fluoride, 0.96 g of urea dissolve in 45 ml of deionized water to form a uniform mixed solution, and add the solution to a reaction containing cleaning carbon cloth. In the kettle, 120 ° C, 5H water heat reacted, and a nickel-cobalt bimetal precursor loaded on the carbon cloth was obtained, and the vacuum drying tank was dried in a vacuum drying tank at 80 ° C. Similarly, the hydrothermal process only adds a single metal salt precursor (corresponding to only hexahydride and hexahydride and cobalt chloride) to synthesize a nickel nanofllen or cobalt nanowire precursor loaded on the carbon cloth.

Example Embodiment

[0049] Example 2:
[0050] Nickel-cobalt nitride heterojunction nanofilay double function catalyst and nickel, cobalt nitride catalyst:
[0051] The nickel-cobalt precursor, nickel precursor, and cobalt precursors in Example 1 obtained Co-Ni 3 N / CC dual function electrocatalyst, and comparative sample nickel, cobalt nitride catalyst, wherein the nitriding temperature is 500 ° C, the nitride time is 2 h, and the temperature rise rate is 5 ° C / min.
[0052] Picture 1-1 A scanning electron microscopy and transmission electron microscopy of nickel-cobalt bilateral precursors are shown. It can be seen from the figure that the nickel cobalt precursor is uniformly loaded on the surface of the carbon cloth, and the nickel-cobalt precursor exhibits two-dimensional line-like morphology and surface. smooth. Figure 1-2 A scanning electron microscopy of nickel, cobalt single metal precursors can be seen that the nickel precursor exhibits regular nanoforms, while cobalt precursors exhibit nanowires.
[0053] diagram 2-1 Co-Ni 3 The n / cc morphology can be seen that it retains the structure of the precursor nanofer, and the surface is rough; Figure 2-2 Co-Ni 3 Elemental distribution of N / CC indicates that the product is mainly composed of ni, CO, and N elements. Figure 2-3 Co-Ni 3 The N / CC X-ray diffraction pattern indicates that the sample contains two components of cobalt and nickel nitride. Figure 2-4 and Figure 2-5 The morphology of nickel nitride and cobalt nitrides, respectively, indicating that they have maintained the topography of the precursor nanofer with nanowires.


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