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Preparation method of size-stable anode with high oxygen evolution catalytic porous coating

A size-stable, porous coating technology, applied to electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of poor stability, high cost, and cumbersome steps, and achieve improved oxygen evolution performance, easy operation, and high oxygen evolution activity. Effect

Active Publication Date: 2022-01-18
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, amorphous materials with high activity generally suffer from poor stability, and other new processes for preparing porous structures are costly and cumbersome. big new DSA

Method used

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  • Preparation method of size-stable anode with high oxygen evolution catalytic porous coating
  • Preparation method of size-stable anode with high oxygen evolution catalytic porous coating
  • Preparation method of size-stable anode with high oxygen evolution catalytic porous coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The raw materials LiOH and H 2 IrCl 6 ·xH 2 O is placed in an organic solvent, and then ultrasonic treatment is performed to dissolve the raw material to obtain a precursor solution; in the precursor solution, the molar ratio of LiOH:H 2 IrCl 6 ·xH 2 O=4:1; LiOH and H 2 IrCl 6 ·xH 2 The mass ratio of the total amount of O to the organic solvent is 3:1;

[0050] Add the precursor solution onto the substrate dropwise, so that the precursor solution covers the substrate, then put it into a preheated oven, dry and remove the organic solvent, and obtain a substrate with a pretreatment coating; the material of the substrate is Ti;

[0051] Place the substrate with the pre-treatment coating in a preheated muffle furnace for heat treatment, then take it out and air-cool it to room temperature to obtain a substrate with a single-layer coating; heat treatment is carried out at 450±5°C for 5 minutes;

[0052] The substrate with a single-layer coating is repeated the step o...

Embodiment 2

[0060] Method is with embodiment 1, and difference is:

[0061] (1) Molar ratio LiOH:H in the precursor solution 2 IrCl 6 ·xH 2 O=2:1; LiOH and H 2 IrCl 6 ·xH 2 The mass ratio of the total amount of O to the organic solvent is 3.5:1;

[0062] (2) keep warm for 8 minutes during heat treatment;

[0063] (3) The current density is 10mA / cm 2 and 100mA / cm 2 , the potentials were 1.446V vs RHE and 1.490V vs RHE, respectively.

Embodiment 3

[0065] Method is with embodiment 1, and difference is:

[0066] (1) Molar ratio LiOH:H in the precursor solution 2 IrCl 6 ·xH 2 O=3:1; LiOH and H 2 IrCl 6 ·xH 2 The mass ratio of the total amount of O to the organic solvent is 4:1;

[0067] (2) Keep warm for 10 minutes during heat treatment;

[0068] (3) The current density is 10mA / cm 2 and 100mA / cm 2 , the potentials were 1.437V vs RHE and 1.479V vs RHE, respectively.

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Abstract

The invention relates to a preparation method of a size-stable anode with a high oxygen evolution catalytic porous coating, the preparation method comprises the following steps: (1) putting raw materials LiOH and H2IrCl6. XH2O into an organic solvent, and carrying out ultrasonic treatment; (2) dropwise adding a covering substrate, and drying; (3) carrying out heat treatment in a preheated muffle furnace, and carrying out air cooling; (4) repeating the steps (2) and (3) for a plurality of times; (5) dropwise adding the precursor solution to cover a substrate with a plurality of coatings, drying, placing in a preheated muffle furnace for stabilizing heat treatment, and cooling in air; and (6) drying after washing. The method is simple and convenient to operate and easy to implement, and the proportion, the grain size and the porosity can be accurately controlled; the coating has a special microcosmic porous structure and efficient oxygen evolution catalytic performance, and can be stably used under an acidic condition.

Description

technical field [0001] The invention belongs to the technical field of electrode materials in the electrochemical industry, and in particular relates to a method for preparing a dimensionally stable anode with a high oxygen evolution catalytic porous coating. Background technique [0002] In the hydrometallurgical production process of copper, zinc and other metals, the electrolytic deposition step consumes a lot of electric energy, which is mainly due to the high oxygen evolution overpotential of the anode during the electrolytic deposition process. At present, lead-based anodes are commonly used in the copper-zinc electrolytic deposition process, which has a high oxygen evolution overpotential, and has the disadvantages of easily polluting cathode products and prone to creep during the electrodeposition process. The dimensionally stable anode (DSA) proposed in 1963 has the advantages of stable size, low oxygen evolution overpotential, and no product pollution. The oxygen ...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B1/04C25B11/053C25B11/063C25B11/075
CPCC25B11/031C25B1/04C25B11/053C25B11/063C25B11/075Y02E60/36
Inventor 王伟戴武帅谢锋畅永锋路殿坤符岩
Owner NORTHEASTERN UNIV