Phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material as well as preparation method and application thereof

A technology of carbon nanofibers and composite materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as large overpotential and slowness, and achieve electrical conductivity Good, stable physical and chemical properties, and the effect of increasing the active surface area

Active Publication Date: 2020-02-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxygen evolution reaction is one of the key processes in electrochemical water splitting. Because of its inherently slow kinetic reaction process, it requires a large overpotential, resulting in a huge energy consumption problem.

Method used

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  • Phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material as well as preparation method and application thereof
  • Phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material as well as preparation method and application thereof
  • Phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

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

[0031] Step 1: Dissolve cobalt 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;

[0032] Step 2: Add nitrogen-doped carbon nanofibers to the solution A prepared in step 1, ultrasonically disperse for 1 hour, and then conduct a hydrothermal reaction at a reaction temperature of 120°C and a reaction time of 10 hours. After the reaction is completed, cool 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 of 5° C. / ...

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Abstract

The invention discloses a phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material, which is characterized in that the phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material is prepared by taking nitrogen-doped carbon nanofiber as a carrier and growing CoFe-LDH nanoparticles on the surfaces of the nitrogen-doped carbon nanofiber in situ.The preparation method comprises an annealing process and a high-temperature phosphorus doping process. The phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material prepared by the invention 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 in particular relates to a phosphorous-doped cobalt oxide, iron-nitrogen-doped carbon nanofiber composite material and a preparation method and application thereof. Background technique [0002] With the increasing consumption of fossil fuels in human society, the use of renewable and clean energy is the key to solving such problems, and the production of renewable and clean energy through electrochemical water splitting is an important way. As one of the key processes in electrochemical water splitting, the oxygen evolution reaction requires a large overpotential due to its inherently slow kinetic reaction process, resulting in huge energy consumption. Therefore, it is urgent to develop cheap, efficient, and excellent cycle performance OER catalysts to lower the reaction energy barrier and accelerate the reaction efficiency. At present, in order to replace the commonly ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/75B01J35/06C25B1/04C25B11/06
CPCB01J23/002B01J27/24B01J23/75C25B1/04C25B11/04B01J35/397B01J35/33B01J35/58Y02E60/36
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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