Preparation technology applicable to hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfide material

A technology of molybdenum disulfide and hydrogen evolution cathode, applied in the direction of physical/chemical process catalysts, electrodes, chemical instruments and methods, etc., can solve the problems of complex solutions, high production costs, and many equipment, so as to increase the degree of disorder and easy to operate , The effect of low equipment requirements

Inactive Publication Date: 2019-10-01
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The overpotential is 156mV, and the Tafel slope is 74mV/dec. However, this method r

Method used

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  • Preparation technology applicable to hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfide material
  • Preparation technology applicable to hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfide material
  • Preparation technology applicable to hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfide material

Examples

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Example Embodiment

[0021] Example 1: Preparation of 2H-spherical molybdenum disulfide

[0022] Take a certain amount of sodium molybdate, thiourea and silicon dioxide into a 100mL reaction vessel in turn, magnetically stir for 30 minutes and then heat at 160℃, 180℃ and 200℃ respectively, and cool naturally. The product obtained is deionized water Wash with absolute ethanol several times, and the samples are labeled M160, M180, and M200. Treated with HF solution to obtain pure 2H phase MoS2, respectively labeled H-M160, H-M180, H-M200. At the same time, a sample without silica was used for comparison, and the same procedure was performed at 160°C, with only sodium molybdate and thiourea as the raw material. This sample is labeled H-N-M160 after treatment with hydrofluoric acid and N-M160 before treatment with hydrofluoric acid. figure 1 It is shown that the hump that appears around 2θ=22° can be attributed to the presence of silica. At 160°C, the (002) plane of the sample completely expanded to 0....

Example Embodiment

[0023] Example 2: Preparation of oxygen-doped spherical molybdenum disulfide

[0024] Take a certain amount of sodium molybdate, thiourea and silicon dioxide into a 100mL reaction vessel in turn, magnetically stir for 30 minutes and then heat at 160℃, 180℃ and 200℃ respectively, and cool naturally. The product obtained is deionized water Wash with absolute ethanol several times, and the samples are labeled M160, M180, and M200. The oxygen-doped molybdenum disulfide treated with NaOH solution is labeled N-M160, N-M180, and N-M200; at the same time, the sample without silica is used for comparison, and the same steps are performed at 160°C. Raw materials Only add sodium molybdate and thiourea. This sample is labeled N-N-M160 after being treated with sodium hydroxide, and labeled N-M160 before being treated with sodium hydroxide. Figure 5 The XRD patterns of different molybdenum disulfide structures after NaOH treatment are shown. The interlayer spacing at 2θ=8.9° in the N-N-M160...

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Abstract

The invention relates to the technical field of green energy, in particular to a preparation technology applicable to a hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfidematerial. The synthesis process of the catalyst is simple, the safety is high, the cost is low, a large amount of oxygen-doped spherical molybdenum disulfide can be quickly synthesized, more marginalactive sites are provided, and the hydrogen evolution catalytic activity is improved. The technology comprises the steps of (1) dissolving sodium molybdate, thiourea and silicon dioxide in water; (2)transferring the mixed liquid to a reaction kettle, carrying out magnetic stirring treatment to form a uniform solution, and carrying out a hydrothermal reaction on the solution in the sealed reactionkettle; (3) separately treating a sample after hydrothermal treatment with hydrofluoric acid and sodium hydroxide, washing obtained products with deionized water and absolute ethyl alcohol several times, and drying the products overnight to obtain molybdenum disulfide with different structures.

Description

technical field [0001] The invention relates to the technical field of green energy, in particular to a preparation technology suitable for hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfide material. Background technique [0002] As we all know, at present, fossil energy occupies a vital position in the world energy market, and the accelerated growth of the modern energy economy is highly dependent on the possible dwindling fossil fuel resources. (Energies2015, 8, 172-216) Excessive carbon emissions have already led to a 4°C increase in global temperature, a result that may raise sea levels enough to submerge 4.6-7.6 million people worldwide. (Renewable and Sustainable Energy Reviews 2018, 82, 3091–3106) Some research data suggest that known oil reserves are expected to be exhausted in 34 to 40 years, coal in 106 to 200 years, and natural gas in 36 to 70 years (EnergyPolicy 2009, 37, 181–189). These data have reignited research interest in rene...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/08C25B1/04C25B11/06
CPCB01J27/051B01J35/0033B01J35/08C25B1/04C25B11/04Y02E60/36
Inventor 马炜李焕冉韩一帆
Owner ZHENGZHOU UNIV
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