Preparation method of high-current-density water electrolysis hydrogen production catalyst

A catalyst, high current technology, applied in the electrolysis process, electrolysis components, electrodes and other directions, can solve the problems of low electrolysis efficiency, high energy consumption, low catalyst activity, etc., to improve the activity and efficiency of hydrogen production, easy to control the dispersion, The effect of reducing the energy consumption of hydrogen production

Pending Publication Date: 2022-04-01
CHANGZHOU UNIV
5 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] However, the biggest problem and difficulty in electrolyzing water to produce hydrogen at present is that the electrolysis efficiency is low (the current density is less than 1000mA/cm 2 ), high energy consumption (overvoltage greater than 0.5V), the main reason is that the electrolytic hydrogen production electrode catalytic hydrogen production effect is still not good
[0004] At present, it is difficult to control the size and d...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Abstract

The invention discloses a preparation method of a high-current-density water electrolysis hydrogen production catalyst, which comprises the following steps: mixing solid organic amine, metal and nanocarbon to obtain a mixture, and carrying out ball milling to obtain a ball-milled mixture; and pyrolyzing the mixture in a nitrogen atmosphere, catalyzing the solid organic amine to decompose by the metal, and'welding 'the metal and the nano carbon in situ to obtain the catalyst for hydrogen production by water decomposition. Wherein the thermal decomposition temperature ranges from 300 DEG C to 650 DEG C, and the thermal decomposition time ranges from 10 min to 24 h. In the prepared catalyst, the metal active component nanoparticles are welded on the outer surface of the carbon nanotube through the nitrogen-doped graphene obtained through metal catalytic solid organic amine decomposition, the size of the metal active component nanoparticles and the dispersity of the metal active component nanoparticles on the surface of the carbon nanotube are easy to control, and the water electrolysis hydrogen production activity and efficiency of the catalyst are improved; and the hydrogen production energy consumption is reduced.

Application Domain

Technology Topic

Image

  • Preparation method of high-current-density water electrolysis hydrogen production catalyst
  • Preparation method of high-current-density water electrolysis hydrogen production catalyst
  • Preparation method of high-current-density water electrolysis hydrogen production catalyst

Examples

  • Experimental program(15)

Example Embodiment

[0037] Embodiment 1
[0038] The present embodiment provides a preparation method containing Co and carbon nanotube catalyst, the main steps are:
[0039] (1) 5 g of melamine, 0.5 g of carbon nanotubes and 4.9 g of cobalt nitrate were ball-milled (600 rpm/6 h, and the mass ratio of zirconia ceramic balls to the mixture was 5:1.
[0040] (2) The ball-milled mixture was placed in a crucible and pyrolyzed with nitrogen at 550 degrees for 4 hours, and the obtained sample 1 was used for the evaluation of the reaction performance of electrolysis of water for hydrogen production.
[0041] (3) To achieve 1000mA/cm2, an overvoltage of 0.48V needs to be applied; under the overvoltage of 0.3V, the normalized hydrogen production rate reaches 0.5mL/min·g.

Example Embodiment

[0042] Example 2
[0043] The present embodiment provides the preparation of a catalyst containing Ni and carbon nanotubes:
[0044] (1) 5 g of melamine, 0.5 g of carbon nanotubes and 4.9 g of nickel nitrate are ball-milled (600 rpm/6 h, the mass ratio of zirconia ceramic balls to the mixture is 5:1).
[0045] (2) The ball-milled mixture was placed in a crucible and pyrolyzed with nitrogen at 550 degrees for 4 hours, and the obtained sample 2 was used for the evaluation of the reaction performance of electrolysis of water for hydrogen production.
[0046] (3) Realize 1000mA/cm 2 An overvoltage of 0.65 V needs to be applied; at 0.3 V overvoltage, the normalized hydrogen production rate reaches 0.2 mL/min g.

Example Embodiment

[0047] Example 3
[0048] The present embodiment provides a preparation method containing Co, Ni and carbon nanotube catalyst, the main steps are:
[0049](1) 5 g of melamine, 0.5 g of carbon nanotubes, 2.45 g of cobalt nitrate and 2.45 g of nickel nitrate were ball-milled (600 rpm/6 h, and the mass ratio of zirconia ceramic balls to the mixture was 5:1.
[0050] (2) The ball-milled mixture was placed in a crucible and pyrolyzed with nitrogen at 550 degrees for 4 hours, and the obtained sample 3 was used for the evaluation of the reaction performance of electrolysis of water for hydrogen production. The electron microscope image of the sample (ME-Co/Ni(1:1)@CNT in Example 3, see image 3.
[0051] (3) Realize 1000mA/cm 2 An overvoltage of 0.39 V needs to be applied; at 0.3 V overvoltage, the normalized hydrogen production rate reaches 6.5 mL/min g.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Classification and recommendation of technical efficacy words

  • Easy to prepare
  • Easy to repeat

Preparation method for 107 silicon rubber with controllable viscosity

ActiveCN101928399AReduce dosageEasy to repeatIonChemistry
Owner:浙江中天东方氟硅材料股份有限公司 +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products