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A kind of ti-mn based porous hydrogen evolution cathode material, preparation method and application

A hydrogen evolution cathode and porous material technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of easy dissolution and damage of components, and achieve the effect of protecting electrode materials, reducing reaction activation energy, and reducing hydrogen evolution over-site.

Active Publication Date: 2021-06-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects and deficiencies of the prior art, the present invention uses a Ti-Mn-based hydrogen storage alloy as the base material of the hydrogen-evolution cathode, provides a Ti-Mn-based porous hydrogen-evolution cathode material, a preparation method and an application, and solves the problem that the existing hydrogen-evolution cathode is intermittently The problem that the components are easily dissolved and damaged during electrolysis realizes the long-term stability of the hydrogen evolution cathode

Method used

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  • A kind of ti-mn based porous hydrogen evolution cathode material, preparation method and application
  • A kind of ti-mn based porous hydrogen evolution cathode material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Mix titanium sponge, manganese powder, and chromium powder at a molar ratio of 1:1.8:0.3, put it into a suspension induction furnace, and repeatedly smelt it three times in a high-purity argon environment, and pour it into a water-cooled copper crucible to obtain Ti 33 mn 60 Cr 7 alloy.

[0033] Among them, the hydrogen absorption and desorption performance test of the alloy was carried out on a Sievert-type gas reaction controller, evacuated at 473K for 30 minutes, and then absorbed hydrogen at 298K and 5MPa initial hydrogen pressure for 20 minutes, and then raised the temperature to 473K and evacuated , so repeated 3 times to complete the activation process of the alloy. The alloy is tested for hydrogen absorption and desorption under the condition of 298K. Under the hydrogen pressure of 5MPa, the hydrogen absorption and absorption capacity of the alloy, and the hydrogen desorption capacity of the alloy are the difference between the hydrogen absorption capa...

Embodiment 2

[0038] Step 1: Mix titanium sponge, manganese powder, and iron filings at a molar ratio of 1.2:1.6:0.2, put them into a suspension induction furnace, and repeatedly smelt them three times in a high-purity argon environment, and pour them into a water-cooled copper crucible to obtain Ti 40 mn 53 Fe 7 alloy. The hydrogen absorption and desorption performance test of the alloy is the same as in Example 1, and the test results show that the obtained Ti 40 mn 53 Fe 7 The effective hydrogen desorption capacity of the alloy is 1.78wt%.

[0039] Step 2: The obtained alloy is mechanically ground into powder with a particle size of about 1-20 μm. then Ti 40 mn 53 Fe 7 The alloy powder is pressed and formed, the pressing pressure is 200MPa, the holding time is 1min, and then sintered in the argon atmosphere, the temperature is 900°C, the time is 1h, and Ti is obtained after cooling in the furnace. 40 mn 53 Fe 7 porous alloy substrate.

[0040] Step 3: Take Ti 40 mn 53 Fe 7...

Embodiment 3

[0043] Step 1: Mix titanium sponge, manganese powder, chromium powder, and iron filings at a molar ratio of 1:1.5:0.35:0.15, put it into a suspension induction furnace, and repeatedly smelt it three times in a high-purity argon environment, and place it in a water-cooled copper crucible Pouring in, get Ti 33 mn 50 Cr 12 Fe 5 alloy. The hydrogen absorption and desorption performance test of the alloy is the same as in Example 1, and the test results show that the obtained Ti 33 mn 50 Cr 12 Fe 5 The effective hydrogen release capacity of the alloy is 1.85wt%.

[0044] Step 2: Put Ti 33 mn 50 Cr 12 Fe 5 The alloy powder is pressed into shape, the pressing pressure is 150MPa, the holding time is 1min, and then sintered in the argon atmosphere, the temperature is 950°C, the time is 1h, and Ti 33 mn 50 Cr 12 Fe 5 porous alloy substrate.

[0045] Step 3: Take Ti 33 mn 50 Cr 12 Fe 5 The porous alloy substrate is used as the cathode, and the spectrally pure graphite...

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Abstract

The invention discloses a Ti-Mn-based porous hydrogen-evolving cathode material, a preparation method and an application thereof. The Ti-Mn-based hydrogen-storage alloy powder is used as a raw material, and a hydrogen-evolving cathode substrate is prepared by a solid-phase sintering method, and then coated and modified. , to obtain the final hydrogen evolution cathode material, as the cathode material in water electrolysis hydrogen production. On the one hand, the substrate itself is porous and has a large surface area, which can provide more reaction interfaces for the hydrogen evolution process of the electrode, making the reaction easier to proceed. The Ni-based alloy coating with high catalytic activity can be modified on the porous substrate to further reduce the activation energy of the reaction. Reduce the hydrogen evolution point and energy consumption; on the other hand, the matrix has a large hydrogen storage capacity and good hydrogen absorption and desorption kinetics at room temperature. During normal electrolytic hydrogen production, it can absorb part of the hydrogen into the alloy. When the power is turned off, the absorbed hydrogen It can migrate to the surface of the electrode through diffusion, and replace the electrode components for oxidation reaction, thereby protecting the electrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of hydrogen evolution cathode materials for electrolytic hydrogen production, and in particular relates to a Ti-Mn based porous hydrogen evolution cathode material, a preparation method and an application. Background technique [0002] With the increasingly serious environmental problems, actively developing clean and renewable energy has become the consensus of all countries. However, solar energy, wind energy and other renewable energy sources generally have problems such as intermittency and regionality, which seriously limit their application. As a renewable energy source, hydrogen energy has attracted the attention of researchers due to its advantages of high efficiency, storage and transportation, and non-polluting products. It uses intermittent energy sources such as solar energy and wind energy to generate electricity, and then electrolyzes water to produce hydrogen to generate hydroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/031C25B11/052C25B11/061C25B11/089C25B1/04C25D3/56B22F3/11
CPCB22F3/11C25B1/04C25D3/562C25B11/031C25B11/051C25B11/061C25B11/091Y02E60/36
Inventor 王斌杜金晶李二虎周猛刘卓祺
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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