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Nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst and preparation method thereof

A technology of carbon fiber and co-doping, which is applied in the field of nickel-cobalt-based carbon fiber electrolysis water catalyst and its preparation, can solve the problems of poor catalyst stability and low electrolysis efficiency, achieve cost saving, increase activity and stability, simple and effective preparation The effect of the method

Active Publication Date: 2018-12-21
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of low electrolysis efficiency and poor stability of the catalyst used in the existing hydrogen production, the present invention proposes a nitrogen and sulfur in-situ co-doped nickel-cobalt-based carbon fiber electrolysis water catalyst and its preparation method

Method used

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  • Nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst and preparation method thereof
  • Nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst and preparation method thereof
  • Nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst and preparation method thereof

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specific Embodiment approach 1

[0035] Specific embodiment one: In this embodiment, nitrogen and sulfur in-situ co-doped nickel-cobalt-based carbon fiber electrolysis water catalyst is composed of carbon fiber matrix and nanoparticles; the nanoparticles are loaded inside and on the surface of the carbon fiber matrix; the nanoparticles are nickel-cobalt nitrides and nickel cobalt sulfide, nickel cobalt nitride molecular formula is Ni x co y N z , in the molecular formula, x is 1~2, y is 1~2, z is 1~2; the molecular formula of nickel cobalt sulfide is Ni a co b S c , In the molecular formula, a is 1-2, b is 1-2, and c is 1-2.

[0036] This embodiment has the following beneficial effects:

[0037] 1. In the nitrogen and sulfur in-situ co-doped nickel-cobalt-based carbon fiber electrolysis water catalyst material of this embodiment, Ni and Co have unfilled valence layer d orbitals, so they have a catalytic effect on hydrogen evolution and oxygen evolution reactions, and then Save costs in the actual produc...

specific Embodiment approach 2

[0040] Embodiment 2: This embodiment is different from Embodiment 1 in that: the particle size of the nanoparticles is 3-7 nm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0041] Specific embodiment three: In this embodiment, the preparation method of nitrogen and sulfur in-situ co-doped nickel-cobalt-based carbon fiber electrolysis water catalyst is carried out according to the following steps:

[0042] 1. Preparation of electrospinning precursor solution:

[0043] According to the molecular formula Ni x co y N z and Ni a co b S c The molar ratio of each element in the formula is to weigh nickel nitrate, cobalt nitrate and thioamide compound as raw materials, add the weighed raw materials into N,N-dimethylformamide to obtain a mixed solution a, and mix at room temperature with magnetic stirring Solution a until the raw materials are completely dissolved, then add polyvinylpyrrolidone to obtain mixed solution b, and stir the mixed solution b at a uniform speed for 4-6 hours to obtain a completely dissolved transparent electrospinning precursor solution; molecular formula Ni x co y N z Where x is 1~2, y is 1~2, z is 1~2; molecular formula...

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Abstract

The invention discloses a nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst and a preparation method thereof, and relates to a nickel cobalt based carbon fiber electrolytic water catalyst and a preparation method thereof. The invention aims at solving the problems of low electrolytic efficiency and poor stability of a used catalyst in the existing preparation of hydrogen. The catalyst is prepared from a carbon fiber matrix and nanoparticles, wherein the nanoparticles are loaded at the inner part and on the surface of the carbon fiber matrix. Thepreparation method comprises the following steps: weighing nickel nitrate, cobalt nitrate and a thioamide compound according to the molar ratio of all elements in molecular formulae NixCoyNz and NiaCobSxc, and then adding polyvinyl pyrrolidone to obtain a precursor solution; carrying out electrostatic spinning and finally carrying out high temperature sintering. The nitrogen and sulfur in situ co-doped nickel cobalt based carbon fiber electrolytic water catalyst material, disclosed by the invention, has the advantages of better catalyst activity and stability and double function catalysis of hydrogen precipitation and oxygen precipitation; the electrolytic efficiency reaches as high as 95 percent. The preparation method disclosed by the invention is suitable for preparing an electrolytic water catalyst.

Description

technical field [0001] The invention relates to a nickel-cobalt-based carbon fiber electrolysis water catalyst and a preparation method thereof. Background technique [0002] With the increasing energy crisis and environmental pollution, the development of various new energy and renewable energy has been highly valued by countries all over the world. Green renewable energy such as wind energy, solar energy and hydropower have brought hope to people to solve the energy crisis. Scientific researchers from all over the world have devoted a lot of energy to the research of these green energy utilization technologies, and have achieved great success. Among them, technologies such as wind power generation, photovoltaic power generation and hydropower generation have been applied on a large scale. Most green renewable energy has the characteristics of uneven temporal and spatial distribution, which requires us to effectively capture, store, transport and transform these energies, ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J35/06C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/24B01J35/33B01J35/40B01J35/58Y02E60/36
Inventor 熊岳平刘超军王状宗鑫李栋
Owner HARBIN INST OF TECH
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