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Ti-Fe based porous hydrogen evolution cathode material and preparation method and application

A hydrogen evolution cathode and porous material technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of easy dissolution and damage of components, and achieve the protection of electrode materials, large hydrogen storage capacity, and reduction of hydrogen evolution over-points. Effect

Active Publication Date: 2019-10-25
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-Fe-based hydrogen storage alloy as the base material of the hydrogen-evolution cathode, provides a Ti-Fe-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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  • Ti-Fe based porous hydrogen evolution cathode material and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Mix titanium sponge, iron filings, and chromium powder at a molar ratio of 1:0.9:0.1, put it into a vacuum non-consumable electric arc furnace, and repeatedly smelt it three times in a high-purity argon environment, and place it in a water-cooled copper crucible Pouring, get Ti 50 Fe 45 Cr 5 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 ab...

Embodiment 2

[0038] Step 1: Mix titanium sponge, iron filings, and manganese powder at a molar ratio of 1:0.8:0.2, put it into a vacuum non-consumable electric arc furnace, and repeatedly smelt it three times in a high-purity argon environment, and place it in a water-cooled copper crucible Pouring, get Ti 50 Fe 40 mn 10 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 50 Fe 40 mn 10 The effective hydrogen desorption capacity of the alloy is 1.65wt%.

[0039] Step 2: The obtained alloy is mechanically ground into powder with a particle size of about 1-20 μm. Ti 50 Fe 40 mn 10 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. 50 Fe 40 mn 10 porous alloy substrate.

[0040] Step 3: Take Ti 50 Fe ...

Embodiment 3

[0043] Step 1: Mix titanium sponge, iron filings, and manganese powder at a molar ratio of 1:0.8:0.2, put it into a vacuum non-consumable electric arc furnace, and repeatedly smelt it three times in a high-purity argon environment, and place it in a water-cooled copper crucible Pouring, get Ti 50 Fe 40 mn 10 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 50 Fe 40 mn 10 The effective hydrogen desorption capacity of the alloy is 1.65wt%.

[0044] Step 2: The obtained alloy is mechanically ground into powder with a particle size of 1-20 μm. Ti 50 Fe 40 mn 10 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. 50 Fe 40 mn 10 porous alloy substrate.

[0045] Step 3: Take Ti 50 Fe 40 mn ...

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Abstract

The invention discloses a Ti-Fe based porous hydrogen evolution cathode material and a preparation method and application. Ti Fe based hydrogen storage alloy powder is taken as a raw material, a hydrogen evolution cathode matrix is prepared by adopting a solid-phase sintering method, and then is subjected to coating modification to obtain the final hydrogen evolution cathode material, and is usedas a cathode material in the hydrogen production by water electrolysis. On the one hand, the matrix has porous properties and large surface area, so that more reaction interfaces can be provided for the hydrogen evolution process of an electrode, and the reaction is easier; the porous matrix is modified with a Ni based alloy coating with high catalytic activity, the activation energy of the reaction can be further reduced, and the hydrogen evolution point location and energy consumption are reduced; on the other hand, the matrix has large hydrogen storage capacity and good room temperature hydrogen absorption and desorption kinetics performance, in normal electrolytic hydrogen production, part of hydrogen can be absorbed into an alloy, and in case of power failure, the absorbed hydrogen can be transferred to the electrode surface through diffusion, the electrode components are replaced to generate oxidation reaction, so that the electrode material can be protected.

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-Fe-based porous hydrogen-evolution cathode material, a preparation method and an application. Background technique [0002] With the continuous advancement of human civilization, the demand for energy is gradually increasing, which brings about 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 ene...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/04C25B11/06C25B1/04C25D3/56B22F3/11
CPCB22F3/11C25B1/04C25D3/562C25B11/031C25B11/051C25B11/061C25B11/091Y02E60/36
Inventor 杜金晶王斌李二虎周猛刘卓祺
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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