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Modification method for collector electrode material of electrolytic cell for water-electrolytic hydrogen making, and application

An electrolytic cell, electrolyzed water technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as Pt is not suitable for anode catalyst, titanium mesh is not tightly combined, and the process is cumbersome, etc. The effect of simplifying the process flow

Inactive Publication Date: 2016-07-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main method is to directly impregnate the titanium mesh in the chloroiridic acid solution, and then use the thermal decomposition method to decompose the IrO 2 Attaching to the surface of the titanium mesh electrode can achieve the effect of modification, but each time the loaded IrO 2 The amount is very small, it needs repeated impregnation and sintering, the process is cumbersome, and IrO 2 The combination with the titanium mesh is not tight enough and it is easy to fall off
Attaching Pt on the surface of titanium mesh by chemical reduction deposition method can reduce the surface impedance of titanium mesh, but due to the particularity of SPE electrolytic cell, Pt is not suitable as an anode catalyst, and the cost is high, so it cannot be used with membrane electrode ( Membrane electrode assembly, MEA) catalytic layer integration
In addition, there is an alloying method to treat the electrode titanium material, but the process is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] High catalyst load modification on the surface of 100 mesh titanium mesh: wash the surface of 100mesh titanium mesh with dilute hydrochloric acid for at least three times, remove surface oil stains, wash with high-purity water for at least three times, and dry at 60°C. After fully mixing 5g of sodium nitrate, 50mg of chloroiridic acid, 100mg of isopropanol and 10 grams of distilled water, place 1g of 100mesh titanium mesh in the solution, the mass ratio of titanium mesh to iridium compound is 20:1, and then put the solution in an oven at 90°C The solution was dried in a medium temperature, and then the dried titanium mesh was sent to a muffle furnace for calcination at 450°C for 1 h, and then cooled to room temperature with the furnace. The titanium mesh was taken out and washed, and baked at 120°C for 3 hours to obtain the collector electrode material of the electrolytic cell for hydrogen production by electrolyzing water after modification.

[0031] The collector mate...

Embodiment 2

[0032] Surface modification of 50mesh titanium mesh: Clean the surface of 50mesh titanium mesh with dilute hydrochloric acid for at least three times, remove surface oil stains, wash with high-purity water for at least three times, and dry at 60°C. After fully mixing 10g of potassium nitrate, 80mg of iridium trichloride and 130mg of isopropanol, ball mill at 180r / min for 2h. After ball milling, the mixture was vacuum-dried at 80°C for 2.5 hours until the mixture was completely dry. Fully cover 8g of titanium mesh with the dry mixture after sieving (50mesh), the mass ratio of titanium mesh to iridium compound is 100:1, then send it into the muffle furnace for sintering at 350°C for 1h, cool to room temperature with the furnace, and take out the titanium mesh and washed, and baked at 120°C for 3 hours to obtain the collector electrode material of the modified electrolysis cell for hydrogen production by electrolysis of water.

[0033] The collector material of the modified elec...

Embodiment 3

[0034] High catalyst load modification on the surface of 100mesh titanium mesh: wash the surface of 100mesh titanium mesh with dilute hydrochloric acid for at least three times, remove surface oil stains, wash with high-purity water for at least three times, and dry at 60°C. After fully mixing 10g of sodium nitrate, 130mg of chloroiridic acid and 130g of isopropanol, ball mill at 180r / min for 2h. After ball milling, the mixture was vacuum-dried at 60°C for 2.5 hours until the mixture was completely dry. Fully cover 7.8g of titanium mesh with the dry mixture after sieving (100mesh), the mass ratio of titanium mesh to iridium compound is 60:1, then send it into a muffle furnace for sintering at 350°C for 1h, and cool to room temperature with the furnace. The titanium mesh was taken out and washed, and baked at 120°C for 3 hours to obtain the collector electrode material of the electrolytic cell for hydrogen production by electrolyzing water after modification.

[0035] The coll...

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Abstract

The invention discloses a modification method for a collector electrode material of an electrolytic cell for water-electrolytic hydrogen making. The method includes the following steps that nitrate, an iridium compound and a solvent are fully mixed to form a solution; a pre-treated collector electrode material of the electrolytic cell for water-electrolytic hydrogen making is soaked in the solution, then dried, calcined, cooled, washed and dried, and a modified collector electrode material of the electrolytic cell for water-electrolytic hydrogen making is obtained, or the steps that the nitrate, the iridium compound and the solvent are fully mixed, subjected to ball-milling, dried and sieved to obtain a mixture, the pre-treated collector electrode material of the electrolytic cell for water-electrolytic hydrogen making is uniformly covered with the mixture, then calcined, cooled, washed and dried, and the modified collector electrode material of the electrolytic cell for water-electrolytic hydrogen making is obtained. The modified collector electrode material, prepared by the method, of the electrolytic cell for water-electrolytic hydrogen making serves as an anode electrode of the electrolytic cell, the electric potential is obviously lowered in the electrolytic process, and the activation impedance and ohmic impedance of the electrolytic cell are obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of materials for electrolytic cells, and relates to a modification method and application of a collector electrode material of an electrolytic cell for hydrogen production by electrolyzing water. Background technique [0002] As the shortage of energy resources in the world is becoming more and more urgent, hydrogen energy has attracted great attention from scientists from all over the world due to its clean, efficient and stable characteristics. Hydrogen energy is a secondary energy source, which can act as a storage medium for traditional new energy such as wind energy and solar energy, effectively store these intermittent electric energies through hydrogen energy, and then centrally convert them into high-quality electric energy and incorporate them into the grid, acting as a buffer for energy conversion medium, or use hydrogen as a chemical raw material for the production of chemical products. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/10C25B1/04C23C24/08
CPCC23C24/082C25B1/04C25B11/051C25B11/055C25B11/073Y02E60/36
Inventor 吕洪宋宇琨张存满周伟杨代军郝传璞
Owner TONGJI UNIV
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