Electrolyzed seawater hydrogen production catalyst based on MXene and transition metal carbide composite nanostructure and synthesis method thereof

A composite nanostructure, transition metal technology, applied in the fields of nanomaterials, energy and catalysis, can solve the problems of transition metal carbide nanocatalysts, performance degradation, poor stability, etc., to achieve excellent catalytic activity and stability, process green environmental protection , the effect of low energy consumption

Active Publication Date: 2018-10-16
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the disadvantages of low activity and poor stability of existing electrolytic water catalysts under seawater conditions, the present invention provides a synthesis method for electrolytic seawater hydrogen production catalysts based on composite nanostructures of MXene and transition metal carbides. The prepared catalyst is composed of uniform Composition of MXene loaded with nanocarbon-coated transition metal carbide nanoparticles with a two-dimensional nanostructure
Among them, the size of transition metal carbide nanoparticles and the thickness ...

Method used

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  • Electrolyzed seawater hydrogen production catalyst based on MXene and transition metal carbide composite nanostructure and synthesis method thereof
  • Electrolyzed seawater hydrogen production catalyst based on MXene and transition metal carbide composite nanostructure and synthesis method thereof
  • Electrolyzed seawater hydrogen production catalyst based on MXene and transition metal carbide composite nanostructure and synthesis method thereof

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Embodiment 1

[0030] Embodiment 1 is based on the preparation method of the composite nanocatalyst of MXene and cobalt molybdenum carbide

[0031] 1) Prepare 30mL tris-hydrochloric acid buffer solution, add 100mg ammonium molybdate tetrahydrate, 20mg cobalt chloride hexahydrate, 20mg dopamine and 5mL MXene dispersion (5.0mg mL -1 ), stirring reaction 24h. After the reaction, it was repeatedly washed with deionized water until neutral, centrifuged, and freeze-dried to obtain a black powder.

[0032] 2) Under the protection of Ar gas, place the product prepared in step 2) in a high-temperature furnace for calcination to obtain a nanocatalyst based on MXene and cobalt-molybdenum carbide. The calcination temperature is 750oC, and the calcination time is 3h. The obtained product has an average size of about 100-500nm, two-dimensional flake nanoparticles loaded with cobalt-molybdenum carbide nanoparticles, the size of the cobalt-molybdenum carbide nanoparticles is about several nanometers, and t...

Embodiment 2

[0033] Embodiment 2 is based on the preparation method of the composite nano-catalyst of MXene and nickel-molybdenum carbide

[0034] 1) Prepare 30mL tris-hydrochloric acid buffer solution, add 100mg ammonium molybdate tetrahydrate, 20mg nickel chloride hexahydrate, 20mg dopamine and 5mL MXene dispersion (5.0mg mL -1 ), stirring reaction 24h. After the reaction, it was repeatedly washed with deionized water until neutral, centrifuged, and freeze-dried to obtain a black powder.

[0035]2) Under the protection of Ar gas, place the product prepared in step 2) in a high-temperature furnace for calcination to obtain a nanocatalyst based on MXene and cobalt-molybdenum carbide. The calcination temperature is 750oC, and the calcination time is 3h. The obtained product has an average size of about 100-500nm, two-dimensional flake nanoparticles loaded with nickel-molybdenum carbide nanoparticles, the size of the nickel-molybdenum carbide nanoparticles is about several nanometers, and t...

Embodiment 3

[0036] Embodiment 3 is based on the preparation method of the composite nanocatalyst of MXene and molybdenum carbide

[0037] 1) Prepare 30mL tris-hydrochloric acid buffer solution, add 100mg ammonium molybdate tetrahydrate, 20mg dopamine and 5mL MXene dispersion (5.0mg mL -1 ), stirring reaction 24h. After the reaction, it was repeatedly washed with deionized water until neutral, centrifuged, and freeze-dried to obtain a black powder.

[0038] 2) Under the protection of Ar gas, place the product prepared in step 2) in a high-temperature furnace for calcination to obtain a nanocatalyst based on MXene and cobalt-molybdenum carbide. The calcination temperature is 750oC, and the calcination time is 3h. The obtained product is about 100-500nm in average size, two-dimensional flake nanoparticles loaded with molybdenum carbide nanoparticles, the size of the molybdenum carbide nanoparticles is about several nanometers, and the surrounding is covered with a carbon layer with a thickn...

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Abstract

The invention discloses an electrolyzed seawater hydrogen production catalyst based on a MXene and transition metal carbide composite nanostructure and a synthesis method thereof, and belongs to the field of nanomaterials and catalysis. The catalyst consists of MXene of coating transition metal carbide nanoparticles by uniform-loaded nanocarbon. The preparation method comprises the following steps: the MXene, metal salt, pH buffer solution and a carbon source precursor are dissolved and mixed uniformly for centrifugation, washing, freezing and drying to obtain a mixture, and are calcined at high temperature in an inertia atmosphere to obtain a structure and component-controllable two-dimensional nanostructure electrocatalyst. The electrocatalyst can overcome the problem of reduction of performances caused by agglomeration and sintering of nanoparticles in the preparation and reaction process of trasition metal carbides, and solves the basic difficulties perplexing the performance exertion and application of the transition metal carbide nanocatalyst; and under the condition of approaching neutrality, excellent catalysis activity and stability are achieved on electrolyzed seawater hydrogen production, and the foundation is laid for wide application of the electrolyzed seawater hydrogen production technology.

Description

technical field [0001] The invention belongs to the field of nanomaterials, energy and catalysis, and relates to an electrolytic seawater hydrogen production catalyst based on a composite nanostructure of MXene and transition metal carbide and a synthesis method thereof. Background technique [0002] Hydrogen energy is regarded as one of the most potential new energy sources in the 21st century due to its advantages of cleanliness, efficiency, safety, and sustainability. At present, the industrial hydrogen production methods mainly include hydrogen production by electrolysis of water, hydrogen production by coal gasification, hydrogen production by steam reforming of natural gas, etc. Among them, the process of hydrogen production by electrolysis of water is clean and efficient, and the hydrogen production purity is high, which is a hydrogen production technology that has attracted much attention. one. At present, the electrolytic hydrogen production catalysts used in indus...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/091Y02E60/36
Inventor 王治宇邱介山吴籼虹
Owner DALIAN UNIV OF TECH
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