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Molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing as well as preparation method and application of molybdenum disulfide catalyst

A molybdenum disulfide and catalyst technology, applied in the fields of electrocatalysis and material science, to achieve the effect of mature synthesis process, optimized hydrogen adsorption and good application prospects

Active Publication Date: 2022-05-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the use of intercalated cations to induce tensile strain on the MoS2 surface, especially in combination with phase engineering, to enhance HER performance.

Method used

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  • Molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing as well as preparation method and application of molybdenum disulfide catalyst
  • Molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing as well as preparation method and application of molybdenum disulfide catalyst
  • Molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing as well as preparation method and application of molybdenum disulfide catalyst

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Embodiment 1

[0034] This embodiment provides a molybdenum disulfide catalyst with an adjustable phase composition and a large interlayer spacing and its preparation method and application, including the following steps:

[0035] (1) Pretreatment of carbon fiber paper (CFP): Carefully ultrasonically clean CFP (2×5cm) with absolute ethanol, hydrochloric acid, and deionized water 2 ), to remove impurities on the surface, first place the CFP in absolute ethanol for 3 minutes of ultrasonic treatment, take it out and rinse it repeatedly with deionized water; ; Then place it in an oven at 80°C for 60 minutes;

[0036] (2) Preparation of the reaction solution: the solute Na 2 MoO 4 (0.19g) and TAA (0.3g) are placed in 50 milliliter beakers, then add the mixed solution of 40 milliliters of deionized water and absolute ethanol as solvent, wherein the volume ratio of deionized water and absolute ethanol is 1:2, Stir at room temperature for 30 minutes under the action of magnetic force until comple...

Embodiment 2

[0042] This embodiment provides a molybdenum disulfide catalyst with an adjustable phase composition and a large interlayer spacing and its preparation method and application, including the following steps:

[0043] (1) Pretreatment of carbon fiber paper (CFP): Carefully ultrasonically clean CFP (10×10cm 2 ), to remove impurities on the surface, first place the CFP in absolute ethanol for 3 minutes of ultrasonic treatment, take it out and rinse it repeatedly with deionized water; ; Then place it in an oven at 80°C for 60 minutes;

[0044] (2) Preparation of the reaction solution: the solute Na 2 MoO 4 (0.19g) and TAA (0.3g) are placed in 50 milliliters of beakers, then add the mixed solution of 40 milliliters of deionized water and absolute ethanol as solvent, wherein the volume ratio of deionized water and absolute ethanol is 2:3, Stir at room temperature for 30 minutes under the action of magnetic force until completely dissolved and uniform;

[0045] (3) Transfer the pr...

Embodiment 3

[0050] This embodiment provides a molybdenum disulfide catalyst with an adjustable phase composition and a large interlayer spacing and its preparation method and application, including the following steps:

[0051] (1) Pretreatment of carbon fiber paper (CFP): Carefully ultrasonically clean CFP (2×5cm) with absolute ethanol, hydrochloric acid, and deionized water 2 ), to remove impurities on the surface, first place the CFP in absolute ethanol for 3 minutes of ultrasonic treatment, take it out and rinse it repeatedly with deionized water; ; Then place it in an oven at 80°C for 60 minutes;

[0052] (2) Preparation of the reaction solution: the solute Na 2 MoO 4 (0.19g) and TAA (0.3g) are placed in 50 milliliters of beakers, then add the mixed solution of 40 milliliters of deionized water and absolute ethanol as solvent, wherein the volume ratio of deionized water and absolute ethanol is 2:1, Stir at room temperature for 30 minutes under the action of magnetic force until co...

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Abstract

The invention relates to a molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing, and a preparation method and application thereof, the molybdenum disulfide catalyst prepared by combining phase engineering and intercalation ion introduction strain effect and using an ethanol preferential reduction strategy has high 1T phase content (73.5%) and additional ammonium ion intercalation, ammonium ion intercalation, and the molybdenum disulfide catalyst can be used for preparing a molybdenum disulfide catalyst with adjustable phase composition and large interlayer spacing. The molybdenum disulfide catalyst has a large interlayer spacing (0.95 nm), more active sites and a faster charge transfer rate. In addition, the insertion of ammonium ions causes local tensile strain of a basal plane, so that hydrogen adsorption of sulfur atoms on the surface of the catalyst is further optimized. Finally, the prepared molybdenum disulfide catalyst has lower overpotential at 10mA cm <-2 > and 100mA cm <-2 > (170mV and 211mV), excellent hydrogen evolution reaction (HER) performance is realized, and the molybdenum disulfide catalyst exceeds most reported molybdenum disulfide-based non-noble metal electrocatalysts.

Description

technical field [0001] The invention belongs to the technical field of material science and electrocatalysis, and specifically relates to a molybdenum disulfide catalyst with an adjustable phase composition and a large layer spacing, a preparation method and application thereof. Background technique [0002] Electrocatalytic water splitting for sustainable hydrogen production is one of the most ideal solutions to alleviate energy crisis and environmental pollution. In order to obtain efficient and stable electrocatalytic water splitting efficiency, the development of high-performance hydrogen evolution reaction (HER) catalysts is the key. In recent years, molybdenum disulfide (MoS 2 ) has attracted extensive attention due to its abundant content, potential catalytic activity, and tunable catalytic performance, and is expected to replace the noble metal Pt. MoS 2 Usually in the form of thermodynamically stable 2H phase, layered structure, individual S-Mo-S layers interact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/056C25B11/054C25B1/04B82Y30/00B82Y40/00
CPCC25B11/091C25B11/056C25B11/054C25B1/04B82Y30/00B82Y40/00Y02E60/36
Inventor 孟超胡涵吴明铂
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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