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

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

CN114262913APending Publication Date: 2022-04-01CHANGZHOU UNIV
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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

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Experimental program
Comparison scheme
Effect test

Embodiment l

[0038] This embodiment provides a preparation method containing Co and carbon nanotube catalysts, the main steps are:

[0039] (1) 5g of melamine, 0.5g of carbon nanotubes and 4.9g of cobalt nitrate were ball milled (600rpm / 6h, 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 subjected to pyrolysis for 4 hours at 550°C with nitrogen gas flow, and the obtained sample 1 was used to evaluate the reaction performance of hydrogen production by electrolysis of water.

[0041] (3) It is necessary to apply an overvoltage of 0.48V to achieve 1000mA / cm2; at an overvoltage of 0.3V, the normalized hydrogen production rate reaches 0.5mL / min·g.

Embodiment 2

[0043] The present embodiment provides a kind of preparation containing Ni and carbon nanotube catalyst:

[0044] (1) 5 g of melamine, 0.5 g of carbon nanotubes and 4.9 g of nickel nitrate were ball milled (600 rpm / 6 h, the mass ratio of zirconia ceramic balls to the mixture was 5:1).

[0045] (2) The ball-milled mixture was placed in a crucible and subjected to pyrolysis for 4 hours at 550°C with nitrogen gas flow, and the obtained sample 2 was used for the evaluation of the reaction performance of hydrogen production by electrolysis of water.

[0046] (3) Achieve 1000mA / cm 2 An overvoltage of 0.65V needs to be applied; at an overvoltage of 0.3V, the normalized hydrogen production rate reaches 0.2mL / min·g.

Embodiment 3

[0048] This embodiment provides a kind of preparation method containing Co, Ni and carbon nanotube catalyst, main steps:

[0049](1) 5g melamine, 0.5g carbon nanotubes, 2.45g cobalt nitrate and 2.45g nickel nitrate were ball milled (600rpm / 6h, 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 subjected to pyrolysis for 4 hours at 550°C with nitrogen gas flow, and the obtained sample 3 was used to evaluate the reaction performance of hydrogen production by electrolysis of water. Example 3 sample (ME-Co / Ni(1:1)@CNT electron microscope image, see image 3 .

[0051] (3) Achieve 1000mA / cm 2 An overvoltage of 0.39V needs to be applied; at an overvoltage of 0.3V, the normalized hydrogen production rate reaches 6.5mL / 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

Patent Timeline
01 Apr 2022
Publication
CN114262913A
IPC
C25B11/091; C25B1/04
CPC
Y02E60/36
Inventors
银凤翔; 孙中清