Manganese tungstate nanosheet material and preparation method and application thereof

A technology of manganese tungstate nanometer and sheet material is applied in the directions of nanotechnology, nanotechnology, metal material coating technology, etc., and achieves the effects of simple preparation process, good catalytic activity of electrolyzed water, and low cost.

Active Publication Date: 2018-11-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the technical problem that the non-precious metal catalysts for electrolyzing water to produce hydrogen in the prior art can only be applied to the electrolyte environment with a narrow pH value, the present invention provides a manganese tungstate nanosheet material and its preparation method and application , not only has good electrolytic water catalytic activity in electrolyte environments with various pH values, but also is fast and efficient, low in cost, simple in preparation process, and environmentally friendly and non-polluting, suitable for large-scale industrial production

Method used

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  • Manganese tungstate nanosheet material and preparation method and application thereof
  • Manganese tungstate nanosheet material and preparation method and application thereof
  • Manganese tungstate nanosheet material and preparation method and application thereof

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preparation example Construction

[0025] A preparation method of manganese tungstate nanosheet material, comprising the steps of:

[0026] Step A, mixing sodium tungstate and manganese chloride in water, so that the concentration of sodium tungstate in the mixed solution is 0.5 to 1.5 mmol / liter, and the concentration of manganese chloride is 0.5 to 1.5 mmol / liter, thereby producing A precursor mixed solution was obtained.

[0027] Step B, placing the substrate in the precursor mixed solution, and transferring the substrate and the precursor mixed solution into an autoclave, then reacting at 160-180°C for 360-480 minutes, and then cleaning and drying , so that MnWO was prepared on the substrate 4 Nanosheets, that is, manganese tungstate nanosheet materials. The manganese tungstate nanosheet material can be directly used as a working electrode for electrochemical water splitting.

[0028] Wherein, the substrate can be nickel foam (Nickel Foam, NF), carbon fiber cloth or titanium foil, but it is better to use...

Embodiment 1

[0038] A kind of manganese tungstate nano sheet material, its preparation method comprises the steps:

[0039] Step a, mix sodium tungstate and manganese chloride together in water, make the concentration of sodium tungstate in the mixed solution be 1.0 mmol / L, and the concentration of manganese chloride be 1.0 mmol / L, so as to obtain the mixed precursor solution.

[0040] Step b, using nickel foam (NF) with a size of 1×4cm as the substrate, placing the substrate in the precursor mixed solution, and transferring the substrate and the precursor mixed solution to a 50mL autoclave, and then React at 160°C for 360 minutes, and then sequentially use deionized water and ethanol to treat the substrate and the MnWO grown on the substrate. 4 The nanosheets are ultrasonically cleaned to remove residual substances attached to the surface, and the cleaned substrate and the MnWO grown on the substrate 4 Nanosheets were dried to prepare MnWO on nickel foam substrate 4 Nanosheets.

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Abstract

The invention discloses a manganese tungstate nanosheet material and a preparation method and application thereof. The preparation method comprises: mixing sodium tungstate and manganese chloride in water to allow the sodium tungstate concentration of the obtained solution to be 0.5-1.5 mmol/L and the manganese chloride concentration of the solution to be 0.5-1.5 mmol/L so as to prepare a precursor mixture solution; putting a substrate into the precursor mixture solution; transferring the substrate and the precursor mixture solution together into an autoclave; reacting at 160-180 DEG C for 360-480 min; and cleaning and drying to prepare a MnWO4 nanosheet on the substrate. The manganese tungstate nanosheet material is adopted directly as a working electrode for electrochemical decompositionof water. The material has good water electrolysis catalytic activity in electrolyte environments having various pH values, and is rapid, efficient, cheap, simple to prepare, free of pollution to theenvironment and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of transition metal tungstate nanomaterials, in particular to a manganese tungstate nanosheet material and its preparation method and application. Background technique [0002] The development of human society is closely related to energy. In the past two centuries, human energy supply has mainly relied on non-renewable fossil fuels such as oil, natural gas, and coal. However, with the gradual depletion of fossil energy sources such as oil and coal and the increasingly prominent environmental problems, it is imminent to develop new green and recyclable energy sources. Hydrogen energy has the characteristics of no pollution, high efficiency, and simple preparation, and is considered to be the most ideal and potential energy carrier in the future. The main methods for producing hydrogen in industry are: hydrogen production from methanol, hydrogen production from coal gas, and hydrogen production from electrolysis of wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C23C18/12B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C23C18/1216C25B1/04C25B11/051C25B11/077Y02E60/36
Inventor 李越温路路孙一强蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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