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Phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material and preparation method and application thereof

A technology of nitrogen-doped carbon and nanofibers, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as high prices, inability to meet environmental and energy needs, poor cycle stability, etc., to achieve Good electrical conductivity, superior electrochemical performance, and stable physical and chemical properties

Active Publication Date: 2020-04-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical applications, noble metal-based Ru, Ir and their oxide catalysts have been widely used, but their high price and poor cycle stability make them unable to meet the growing environmental and energy demands.

Method used

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  • Phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material and preparation method and application thereof
  • Phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material and preparation method and application thereof
  • Phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material and preparation method and application thereof

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Experimental program
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Embodiment 1

[0030] like figure 1 As shown, this embodiment provides a method for preparing a phosphorus-doped nickel-iron oxide-nitrogen-doped carbon nanofiber composite material, and the specific steps are as follows:

[0031] Step 1: Dissolve nickel nitrate hexahydrate, ferric nitrate nonahydrate, and ammonium fluoride in deionized water at a molar ratio of 1:2:5, and ultrasonically treat them for 10 minutes to disperse them evenly to obtain solution A;

[0032] Step 2: Add nitrogen-doped carbon nanofibers to the solution A prepared in step 1, sonicate for 1 hour, and then transfer to a hydrothermal kettle for hydrothermal reaction. The reaction temperature is 120°C, and the reaction time is 10 hours. After the reaction After cooling to room temperature, the sample was washed with a mixed solution of ethanol and water, and dried at 80°C for 12 hours to obtain a precursor;

[0033] Step 3: annealing the precursor prepared in step 2 in a nitrogen atmosphere at 350° C. at a heating rate o...

Embodiment 2

[0036] like figure 1 As shown, this embodiment provides a method for preparing a phosphorus-doped nickel-iron oxide-nitrogen-doped carbon nanofiber composite material, and the specific steps are as follows:

[0037] Step 1: Dissolve nickel nitrate hexahydrate, ferric nitrate nonahydrate, and ammonium fluoride in deionized water at a molar ratio of 1:2:10, and ultrasonically treat them for 10 minutes to disperse them evenly to obtain solution A;

[0038] Step 2: Add nitrogen-doped carbon nanofibers to the solution A prepared in step 1, sonicate for 1 hour, and then transfer to a hydrothermal kettle for hydrothermal reaction. The reaction temperature is 120°C, and the reaction time is 10 hours. After the reaction After cooling to room temperature, the sample was washed with a mixed solution of ethanol and water, and dried at 80°C for 12 hours to obtain a precursor;

[0039] Step 3: annealing the precursor prepared in step 2 in a nitrogen atmosphere at 350° C. at a heating rate ...

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Abstract

The invention discloses a phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material which is characterized in that the phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material is prepared by taking nitrogen-doped carbon nanofibers as a carrier and growing NiFe-LDH nanosheets on the surface of the nitrogen-doped carbon nanofibers in situ. Thepreparation method comprises an annealing process and a high-temperature phosphorus doping process. The phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material has the advantages of large specific surface area, good conductivity, stable physical and chemical properties, excellent electrochemical performance and the like.

Description

technical field [0001] The invention belongs to the technical field of metal oxide-carbon materials, and specifically relates to a phosphorous-doped nickel-iron oxide-nitrogen-doped carbon nanofiber composite material and a preparation method and application thereof. Background technique [0002] As one of the key processes in many energy-related applications, the oxygen evolution reaction has attracted much attention. However, its high reaction energy barrier and electronic mechanism determine its high reaction overpotential and slow reaction rate, resulting in the oxygen evolution reaction being the rate-limiting reaction in the water splitting process. Therefore, efficient and stable catalysts that can reduce the reaction overpotential and accelerate the reaction are needed in practical applications. In practical applications, noble metal-based Ru, Ir and their oxide catalysts have been widely used, but their high price and poor cycle stability make them unable to meet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06B01J35/10B01J37/10C25B1/04C25B11/06
CPCB01J27/24B01J37/10C25B1/04C25B11/091B01J35/33B01J35/58B01J35/61Y02E60/36
Inventor 刘天西尚楠赖飞立宗伟缪月娥朱晓波欧阳玥郭和乐
Owner DONGHUA UNIV
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