A kind of preparation method of nitrogen-doped mof-like structure modified two-phase sulfide material

A technology of nitrogen doping and sulfide, applied in the field of electrocatalysis, can solve the problems of easy collapse of catalytic structure and long reaction cycle, achieve high specific surface area, good conductivity, and improve the performance of electrocatalytic reaction

Active Publication Date: 2021-08-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the prior art has a long reaction cycle and the catalytic structure is easy to collapse

Method used

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  • A kind of preparation method of nitrogen-doped mof-like structure modified two-phase sulfide material
  • A kind of preparation method of nitrogen-doped mof-like structure modified two-phase sulfide material
  • A kind of preparation method of nitrogen-doped mof-like structure modified two-phase sulfide material

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Experimental program
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Effect test

Embodiment 1

[0028] The cut-out Ni metal foam (NF, 1cm×2cm) was ultrasonically cleaned with 3M hydrochloric acid, acetone, water and ethanol for 10min, and vacuum-dried at 60°C for 6h before use. Weigh 0.3mmoL NiCl 2 6H 2 O was dissolved in 25 mL of ethylene glycol to obtain solution A. Dissolve 1.0mmoL thiourea in 25mL ethylene glycol solvent to obtain solution B. Add solution B dropwise to solution A, stir well and mix well. Then the mixed solution was transferred to a high-pressure reactor, and at the same time, one piece of the above-mentioned clean and dry NF was vertically put into a sealed high-temperature reactor. Finally, the reaction kettle was put into an oven, and the reaction temperature was controlled at 160°C. After solvothermal reaction for 8 hours, the reaction kettle was taken out and cooled naturally. The product was washed repeatedly with deionized water and ethanol, and dried in a vacuum oven at 60°C for 12 hours to obtain N-Ni 9 S 8 / Ni 3 S 2 / NF (see figure ...

Embodiment 2

[0030] Embodiment 2 is similar to embodiment 1, and substrate is dense nickel sheet (NP) among embodiment 2, and gained electrode is N-Ni 9 S 8 / Ni 3 S 2 / NP (see Figure 4 In part a), compared to the Ni metal foam substrate in Example 1, Ni 9 S 8 There are few crystal phases, most of the material is spherical Ni 3 S 2 , indicating that the radius of curvature and porous structure of the metal substrate are conducive to the occurrence of crystal phase transformation.

Embodiment 3

[0032] Embodiment 3 is similar to embodiment 1, and nickel salt is a kind of in nickel acetate, nickel sulfate, nickel nitrate in embodiment 3, obtains N-Ni 9 S 8 / Ni 3 S 2 / NF, indicating that different types of nickel salt precursors can assist in the completion of crystal phase transformation.

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Abstract

The invention relates to the field of electrocatalysis, in particular to a method for preparing a nitrogen-doped MOF-like structure-modified two-phase sulfide material. The purpose of the invention is to solve the problems of long reaction period and easy collapse of the catalytic structure in the prior art. The main scheme includes the following steps: step (1) dissolving the transition metal salt in a suitable solvent to obtain solution A, dissolving thiourea in a suitable solvent to obtain solution B, adding solution B to solution A, fully stirring and mixing, Transfer to the reactor; step (2) put the clean and dry substrate vertically into the reactor, and after solvothermal reaction, obtain nitrogen-doped layer columnar and spherical two-phase sulfide N-MNiS / Ni; step (4) obtained N‑MNiS / Ni was washed several times with deionized water and ethanol, and dried in a vacuum oven to obtain a two-phase sulfide material.

Description

technical field [0001] The invention relates to the field of electrocatalysis, in particular to a method for preparing a nitrogen-doped MOF-like structure-modified two-phase sulfide material. [0002] technical background [0003] With the decrease of fossil fuels and the increase of global environmental pollution, the development and utilization of clean and renewable energy is imminent. Due to its environmental friendliness and high energy density, hydrogen energy is regarded as one of the main clean energy sources in the future and has been widely studied. Electrocatalytic water splitting technology uses electric energy to split water into hydrogen and oxygen. Because of its simple preparation method, abundant water resources and clean products, it is considered to be the key to obtaining hydrogen energy and energy conversion. The biggest problem with this technology is that the anodic oxygen evolution reaction (OER) needs to remove four protons from water molecules to fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C25B11/095C25B1/04
CPCB01J27/24B01J35/0033B01J35/1004C25B1/04C25B11/04Y02E60/36
Inventor 薛卫东王帅赵睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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