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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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

Method used

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  • 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
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Effect test

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.

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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.

Description

technical field [0001] The invention belongs to the field of catalysis for hydrogen production by electrolysis of water, and in particular relates to a preparation method of a catalyst for hydrogen production by electrolysis of water with high current density. Background technique [0002] With the continuous use of fossil energy and the continuous increase of carbon emissions, the global energy supply and human living environment are facing unprecedented challenges. In order to improve the environment and alleviate the energy crisis, there is an urgent need for clean and sustainable energy. Among the currently developed clean and sustainable new energy sources, hydrogen energy has received special attention and research. Hydrogen energy has the advantages of high reserves, high calorific value, good combustion performance, zero emissions, multiple utilization forms, and high energy conversion efficiency. At present, fossil fuel hydrogen production technology is relatively...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCY02E60/36
Inventor 银凤翔孙中清何小波
Owner CHANGZHOU UNIV
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