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

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

Active Publication Date: 2021-06-11
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 V-Ti-Ni-based hydrogen storage alloy as a hydrogen-evolution cathode base material, provides a V-Ti-Ni-based porous hydrogen-evolution cathode material, a preparation method and an application, and solves the existing problems The problem that the components of the hydrogen evolution cathode are easily dissolved and damaged during intermittent electrolysis has realized the long-term stability of the hydrogen evolution cathode

Method used

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

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Embodiment 1

[0036] Step 1: Mix vanadium pentoxide, titanium dioxide, nickel powder, and aluminum-magnesium alloy powder (reducing agent) at a molar ratio of 1:1:0.67:4.68, and add additives such as calcium oxide, cryolite and magnesium oxide. The amount of calcium oxide is The amount of the aluminum-magnesium alloy is 30wt%, the amount of cryolite is 5wt% of the amount of the aluminum-magnesium alloy, the amount of magnesium oxide is 1wt% of the amount of the aluminum-magnesium alloy, and the amount of the potassium chlorate exothermic agent is 8wt% of the total amount of other materials. The mixed material is put into an induction furnace, ignited and smelted for 10 minutes, and the argon-loaded refining agent calcium fluoride is blown into the bottom of the melt for refining, and the amount of calcium fluoride is 2 wt% of the total charge. After refining for 10 minutes, pour it into a water-cooled copper crucible to obtain V 59 Ti 21 Ni 20 alloy.

[0037] The hydrogen absorption and ...

Embodiment 2

[0042] Step 1: Mix vanadium pentoxide, titanium dioxide, nickel powder, chromium oxide powder, and aluminum-calcium alloy powder in a molar ratio of 1:2.5:2:0.3:7.2, and add additives. The amount of calcium oxide is the amount of aluminum-calcium alloy The amount of cryolite is 10wt% of the amount of aluminum-calcium alloy, the amount of magnesium oxide is 5wt% of the amount of aluminum-calcium alloy, and the amount of potassium chlorate exothermic agent is 10wt% of the total amount of other materials. The mixed material is put into an induction furnace, ignited and smelted for 15 minutes, and calcium fluoride loaded with argon gas is blown into the bottom of the melt for refining, and the amount of calcium fluoride is 3wt% of the total amount of the furnace material. After refining for 15 minutes, pour it in a water-cooled copper crucible to obtain Ti 28 V 33 Cr 9 Ni 30 alloy ingot. The hydrogen absorption and desorption performance test of the alloy is the same as in Exa...

Embodiment 3

[0047] Step 1: Mix vanadium pentoxide, titanium dioxide, nickel powder, iron filings, and aluminum-calcium alloy at a molar ratio of 1:2.5:2:0.65:6.5, and add additives. The amount of calcium oxide is 35wt of the amount of aluminum-calcium alloy %, the amount of cryolite is 10wt% of the amount of aluminum-calcium alloy, the amount of magnesium oxide is 5wt% of the amount of aluminum-calcium alloy, and the amount of potassium chlorate exothermic agent is 10wt% of the total amount of other materials. The mixed material is put into an induction furnace, ignited and smelted for 15 minutes, and calcium fluoride loaded with argon gas is blown into the bottom of the melt for refining, and the amount of calcium fluoride is 3wt% of the total amount of the furnace material. After refining for 15 minutes, pour it in a water-cooled copper crucible to obtain Ti 29 V 31 Fe 10 Ni 30 alloy ingot. The hydrogen absorption and desorption performance test of the alloy is the same as in Exampl...

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Abstract

The invention discloses a V-Ti-Ni-based porous hydrogen evolution cathode material, a preparation method and its application. The V-Ti-Ni-based hydrogen storage alloy powder is used as a raw material to prepare a hydrogen evolution cathode matrix by a solid-phase sintering method, and then the It is modified by coating to obtain the final hydrogen evolution cathode material, which is used 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 a hydrogen evolution cathode material for electrolytic hydrogen production, and in particular relates to a V-Ti-Ni 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/032C25B11/089C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/061C25B11/075Y02E60/36
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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