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A kind of amorphous nifep transition metal catalyst, preparation method and application

A transition metal and catalyst technology, applied in the field of electrochemistry, can solve the problems of high overpotential and poor catalytic performance, and achieve the effects of low energy consumption, simple synthesis method and large specific surface area.

Active Publication Date: 2021-11-19
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides an amorphous NiFeP transition metal catalyst, a preparation method and application thereof, the purpose of which is to improve the composition and surface micromorphology of the amorphous NiFeP transition metal catalyst. Catalytic performance, lower overpotential, thereby solving the technical problems of poor catalytic performance and high overpotential of existing catalysts for seawater electrolysis

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  • A kind of amorphous nifep transition metal catalyst, preparation method and application
  • A kind of amorphous nifep transition metal catalyst, preparation method and application
  • A kind of amorphous nifep transition metal catalyst, preparation method and application

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preparation example Construction

[0045] Another embodiment of the present invention provides a method for preparing the catalyst as described above, the method comprising: immersing a nickel-iron alloy substrate in an organic solution in which red phosphorus is dissolved, and heating at 100-250°C for 5 -7 hours, NiFeP nanorods are formed in situ on the surface of the substrate, and NiFeP nanorod catalysts are obtained after washing; or, the nickel-iron alloy substrate is immersed in an organic solution dissolved with red phosphorus, and heated at 100-250°C for 8- After 10 hours, NiFeP nanosheets were formed in situ on the surface of the substrate, and NiFeP nanosheet catalysts were obtained after washing. Wherein, the organic solution in which the red phosphorus element is dissolved is a colloid containing red phosphorus element obtained by dissolving the red phosphorus element into the organic solution.

[0046] Specifically, the mass of the red phosphorus in the organic solution in which the red phosphorus ...

Embodiment 1

[0053] This embodiment provides a method for preparing an amorphous NiFeP transition metal catalyst, which specifically includes:

[0054] The nickel-iron alloy was cut into small pieces of 4 cm*0.5 cm, soaked in alcohol and deionized water for 10 minutes, and dried at room temperature to obtain the nickel-iron alloy substrate. The ratio of each element in the nickel-iron alloy used in this embodiment is: Ni:Fe=9:1.

[0055] Weigh 600 mg of red phosphorus element with an analytical balance, add it into 10 ml of diethylene glycol solution, and ultrasonicate for 30 minutes, so that the red phosphorus element is uniformly dispersed in the diethylene glycol solution.

[0056] Put the above-mentioned cleaned nickel-iron alloy substrate in the polytetrafluoroethylene liner of a 50ml reaction kettle, pour the above-mentioned mixed solution that is evenly stirred, seal the reaction kettle, and then place it in a blast oven at 250°C for 6 hours , growing nanorod-shaped NiFeP catalytic...

Embodiment 2

[0063] This embodiment provides a kind of preparation method of amorphous NiFeP transition metal catalyst, and this method is the same as the method of embodiment 1, and the difference is that after the mixed solution is poured into the reactor, it is placed in a blast oven Keeping the temperature at 250° C. for 9 hours, and growing the nanosheet-shaped NiFeP catalytic material on the substrate. Finally, a nano-sheet amorphous NiFeP transition metal catalyst is obtained, which is recorded as NiFeP x -NSs.

[0064] to NiFeP x -NSs for product characterization:

[0065] Observation of NiFeP with Scanning Electron Microscope (S-4800) x -NSs sample whose morphology is as Figure 1B Shown are uniformly distributed nanosheets with a thickness of 1-2 nm and a length of 100-200 nm.

[0066] Observation of NiFeP with a transmission electron microscope (Tecnai G2) x -NSs sample whose morphology is as Figure 2B Shown is the nanosheet structure, while NiFeP was observed by selecti...

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Abstract

The invention discloses an amorphous NiFeP transition metal catalyst, a preparation method and an application. The catalyst is used for seawater oxygen or hydrogen evolution catalysis, and the catalyst comprises a nickel-iron alloy substrate and NiFeP nanorods or NiFeP nanosheets grown on the surface of the substrate. The preparation method comprises: immersing a nickel-iron alloy substrate in an organic solution in which red phosphorus is dissolved, and heating at 100-250° C. for 5-7 hours to generate NiFeP nanorods in situ on the surface of the substrate, and obtain NiFeP nanorod catalysts after washing or, immerse the nickel-iron alloy substrate in an organic solution containing red phosphorus, and heat it at 100-250° C. for 8-10 hours to generate NiFeP nanosheets on the surface of the substrate in situ, and obtain NiFeP nanosheet catalysts after washing. The invention improves the catalytic performance and reduces the overpotential by controlling the composition and surface microscopic morphology of the amorphous NiFeP transition metal catalyst, and solves the technical problems of poor catalytic performance and high overpotential of existing catalysts used for seawater electrolysis.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and more specifically relates to an amorphous NiFeP transition metal catalyst, a preparation method and an application. Background technique [0002] Due to the huge challenges of energy crisis and environmental issues, renewable and clean energy are highly sought after. Hydrogen is considered to be one of the most promising clean energy carriers due to its high energy density and non-polluting nature. The electrolysis of water to produce hydrogen fuel is one of the most attractive sustainable technologies. Water electrolysis is decomposed into oxygen by anodic oxygen evolution reaction (OER) and decomposed into hydrogen by cathodic hydrogen evolution reaction (HER). Current noble metal catalyst materials based on Pt, Ir, and Ru show good electrochemical performance, but their high price and scarcity limit their wide application. Therefore, enormous efforts have been invested to develop alterna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/052C25B11/061C25B11/075B01J27/185B82Y30/00B33Y40/00
CPCC25B1/04B01J27/1853B82Y30/00B33Y40/00B01J35/33Y02E60/36
Inventor 王谭源刘健云李箐
Owner HUAZHONG UNIV OF SCI & TECH