Manganese molybdate nanosheet material and preparation method and application thereof
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A manganese molybdate nanometer and nanosheet technology is applied in the direction of metal material coating process, electrode, coating and the like, and achieves the effects of simple preparation process, good electrolytic water catalytic activity and low cost
Inactive Publication Date: 2018-07-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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[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 molybdate nanosheet material and its preparation method and application , not only has good electrolytic water catalytic activity in the electrolyte environment of 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
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[0025] A preparation method of manganese molybdate nanosheet material, comprising the steps of:
[0026] Step A, sodium molybdate and manganese chloride are mixed together in water, so that the concentration of sodium molybdate in the solution after mixing is 0.5~1.5 mmol / liter, and the concentration of manganese chloride is 0.5~1.5 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 MnMoO was prepared on the substrate 4 Nano sheet, that is to obtain manganese molybdate nano sheet material. The manganese molybdate 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, ...
Embodiment 1
[0038] A kind of manganese molybdate nano sheet material, its preparation method comprises the steps:
[0039] Step a, mixing sodium molybdate and manganese chloride in water, so that the concentration of sodium molybdate in the solution after mixing is 1.0 mmol / L, and the concentration of manganese chloride is 1.0 mmol / L, so as to obtain a 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, then use deionized water and ethanol in sequence to treat the substrate and the MnMoO grown on the substrate 4 The nanosheets are ultrasonically cleaned to remove residual substances attached to the surface, and the cleaned substrate and the MnMoO grown on the substrate 4 Nanosheets were dried to produce MnMoO on nickel foam substrates 4 Nanosheets.
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Abstract
The invention discloses a manganese molybdate nanosheet material and a preparation method and application thereof. The preparation method comprises the steps of mixing sodium molybdate and manganese chloride in water regulating the concentration of sodium molybdate in the mixed solution to be 0.5-1.5mmol/l and regulating the concentration of manganese chloride to be 0.5-1.5mmol/l, thus obtaining aprecursor mixing solution; feeding a substrate into the precursor mixing solution; transferring the substrate and the precursor mixing solution into a high-pressure kettle; reacting for 360-480min under the temperature of 160-180 DEG C; and washing and drying, thus obtaining the MnMoO4 nanosheet on the substrate. The manganese molybdate nanosheet material is directly used as a working electrolytefor electrochemically decomposing water; the manganese molybdate nanosheet material is high in water electrolyzing catalyzing activity in electrolyte environments with different pH, and moreover, themanganese molybdate nanosheet material is quick to act, high in efficiency, low in cost, simple to prepare, environmentally friendly, and suitable for massive industrial production.
Description
technical field [0001] The invention relates to the field of transition metal molybdate nanomaterials, in particular to a manganese molybdate nanosheet material and its preparation method and application. Background technique [0002] With the increasingly severe energy crisis and environmental problems, the survival and development of human beings are seriously threatened. Therefore, it is imperative to develop an efficient and clean renewable energy. However, since the storage and transportation of renewable energy such as wind energy, nuclear energy, and solar energy are not easy, an efficient and clean energy carrier is needed as a bridge between renewable energy and users. 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. At present, the main ways to produce hydrogen in industry are: steam reforming of methane, coal gasification and electrol...
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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C23C26/00
CPCC23C26/00C25B1/04C25B11/051C25B11/077Y02E60/36
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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