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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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  • Summary
  • 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 requires a lot of equipment and complex schemes, resulting in high production costs.

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

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Embodiment 1

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

[0022] Take a certain amount of sodium molybdate, thiourea and silicon dioxide and add them to a 100mL reaction kettle in turn, stir magnetically for 30 minutes, heat at 160°C, 180°C and 200°C respectively, and cool naturally. Wash with absolute ethanol several times, and the samples are marked as M160, M180, and M200. Treatment with HF solution yielded pure 2H phase MoS2, labeled as H-M160, H-M180, H-M200, respectively. At the same time, a sample without silica was used as a comparison, and the same steps were carried out at 160°C, and only sodium molybdate and thiourea were added as raw materials. This sample was 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 occurring around 2Θ = 22° can be attributed to the presence of silica. At 160°C, the (002) plane of the sample is fully extended to 0.95nm, which can ...

Embodiment 2

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

[0024]Take a certain amount of sodium molybdate, thiourea and silicon dioxide and add them to a 100mL reaction kettle in turn, stir magnetically for 30 minutes, heat at 160°C, 180°C and 200°C respectively, and cool naturally. Wash with absolute ethanol several times, and the samples are marked as M160, M180, and M200. The oxygen-doped molybdenum disulfide obtained by treating with NaOH solution is marked as N-M160, N-M180, and N-M200 respectively; at the same time, the samples without silica were used for comparison, and the same steps were carried out at 160°C. Only sodium molybdate and thiourea were added. This sample was labeled N-N-M160 after treatment with sodium hydroxide and N-M160 before treatment with sodium hydroxide. Figure 5 XRD patterns of MoS2 with different structures after NaOH treatment are shown. In N-N-M160, N-M160, and N-M180 samples, the interlayer spacing at 2θ=8.9° is 0...

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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
CPCB01J27/051C25B1/04C25B11/04B01J35/33B01J35/51Y02E60/36
Inventor 马炜李焕冉韩一帆
Owner ZHENGZHOU UNIV
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